Mercruiser Precision Parts keep your engines in good, safe operating condition. It’s a piezoelectric automotive sensor that produces a small voltage signal when it hears internal engine noise that we often call knock and ping. they are specifically written for the do-it-yourself-er as well as the experienced mechanic. Hearing a knocking noise when we put it in gear only. This noise is loudest when the engine is under heavy load. Hg (inches of mercury) or (kPa) to check this specification. Inspecting Exhaust Manifolds And Risers. There is a wide variety of Mercruiser engines and models, so this is a broad guide to troubleshooting most gasoline-powered models. 496 MAG Engine pdf manual download. P0300 Random Misfire Detected Code Technical Description. If the gimbal bearing is not bad you might want to check the magnets on the drain plugs the ujoints will make a knocking noise in turns but no squeal the gimbal bearing shouldn't turn free and still might be the problem under load. I'm not boosting more than 8psi, which is the lowest I can go, and I've been babying the car since the noise got louder. AmazonBasics Noise Reduction Safety Earmuffs $11. Transmission Service. The last few times out my 40 hp Mercury outboard (2-stroke, 2004 model year) has made sort of a squealing or screeching noise at idle or low speed. Ive got a WOT hesitation with backfire/ spark knock that I can't figure out. What results can I expect from worn bearings? From piston slap? From a loose rod?. The noise will diminish when the oil warms up and starts to flow properly. Who’s Knocking? Engine “knock” refers to uncontrolled and explosive gasoline ignition in the combustion chamber. Ten minutes later, I went under an overpass and heard the dreaded knock. 1L Engine Specs: This item must be installed to a torque value of 15 lbs ft with d. Mercruiser alpha noise. If the sound doesn't change, look at parts other than the reciprocating ones. 3 Mercruiser that while idling in gear at trolling speed of 2. Contact our MerCruiser specialists for assistance running through the diagrams and locating the right components. NOTE: If NOT Using MerCruiser Timing Tool: With engine running, set the scan tool or Marine Diagnostic Code Tool to the SERVICE MODE and follow manufacturer’s instructions. 3 mpi timing chain noise mercruiser 4. Didnt sound like a rod knock. Autopartswarehouse. Engine Knocking. Not responsible for typographical errors. Man, I've heard it - would have sworn it was a valve tap!. Each Whipple SC System comes with a recalibrated stock ECU that has all the proper modifications to control idle, fuel, spark and most importantly, diagnostics such as knock control. View online or download Mercruiser Sterndrive 5. Knocking noise on 7. A quick steady tap may indicate lifters or cam lobe, while a clatter may be loose/worn rocker arms. Its gonna stay parked for about a week. Michael Bokros 8,586 views. A whole new sporty feel at the wheel. However she has always made a very audible whirring noise (not a clunking or knocking) as the drive goes close to either steering lock. - Answered by a verified Marine Mechanic. The noise seems to be coming from the port side of the engine towards the transom. 496 MAG Engine pdf manual download. Damaged or worn main bearing noise is revealed by dull thuds or knocks which happen on every engine revolution. 2 MAG ECT which produces 380 HP and the second being the 8. In the version 1. Pinging or spark knock is properly called "pre-ignition" and is often incorrectly called "valve noise" because it sounds similar to loose valves that need adjusting. I get a low knocking sound in my outdrive. One sound is prevelant at idle (Lifters) while the other is under acceleration (Exaughst). Pretty sure it tracks with engine RPM, though it gets a bit quieter with increasing RPM. If it is a ticking noise, it will more than likely be a valve train issue. Use an accurate digital vacuum gauge that reads in either in. Ive got a WOT hesitation with backfire/ spark knock that I can't figure out. Have a 4 cylinder, 3. Abnormal combustion, more commonly known as knock or detonation, has been the limiting factor in internal combustion engine power generation since the discovery of the otto cycle itself. Hg (inches of mercury) or (kPa) to check this specification. frank_king. 0L Knocking Sound Folks, Just bought a Maxum Bowrider 1990 vintage with what appears to be the original engine (5000 Hrs) and on my first outing engine ran very smoothly but after about 20 minutes power dropped and a loud knocking sound came from the engine although it was still running. It's boating time, and the family can't wait to get on the water. The last few times out my 40 hp Mercury outboard (2-stroke, 2004 model year) has made sort of a squealing or screeching noise at idle or low speed. a tech article on how to prevent detonation, pre-ignition and knock. Torsional vibration damper failure signs Torsional vibration dampers are crankshaft pulleys with a rubber damping element between the two main metal parts. Keeping a wary eye on raw-water cooled manifolds and risers can prevent the premature death of your engine. 7 Mercruiser. 496 MAG Engine pdf manual download. Merc MPI engine does not start, idle or is beeping twice every minute An IAC (idle air control) is designed to adjust the engine idle RPM speed by opening and closing an air bypass passage inside the throttle body. After installing a new starter, the car starts fine, but I get a knocking noise. Either way, it was a high mileage engine, it was making a noise, and it became an actual problem after running seafoam through it. Here we use a Piezo element to detect sound, what will allow us to use it as a knock sensor. The noise you hear is a knock that is heard towards the bottom of the engine. Mercruiser 170 470 or 3. 4l 454 Ci High Output Base Engine With Fuel And Spark. Do be sure you have the transmission filled fully and not running dry. Email, call or reach out on Facebook for quality customer service to help place your order. 3L MPI ECT 220 HP Fly Out of the Gate. How much should a Rod bearing cost to replace/repair? 23 Answers. 0L 861459-1 Ignition Control Module Knock Sensor Uni. kinda hard to say if its coming from the starter area. Applications: All Workhorse Chassis Equipt with an 8. We're sure this How to Replace a Harmonic Balancer article will help you get your car back on track!. As found in a cam-in-block engine, lifters are responsible for transmitting the movement of the camshaft lobes. Not responsible for typographical errors. Not sure what that might sound like? This video is a good example of a textbook exhaust manifold leak. A knock sensor (located at the rear of the engine block) sends signals to an ESC module which then signals the ECM that knocking is being detected. 7 the engine isn't making any unusual sounds like tapping or knocking and the compression is good then they are good work-horse engines. Have a 4 cylinder, 3. Best way I can describe it is a loud metallic knock. boat knocking noise you say it runs OK? Well, if the rubber mounts are weak, it will get metal-to-metal in the midsection, in gear. Now I'm at around 500 hours and it sounds the same. When U-joints get worn they can cause a thumping, knocking sound when stern drives are turned. 0L Alpha MPI 350 MAG COMPUTER ECM 5550204 2003 864271-005 864916. Volvo Penta AD41 Engine Had A Knocking Noise. Not responsible for typographical errors. Picture of rear main seal. Fuel pressure regulator problem symptoms and the diagnosis Like any other mechanical equipment, the fuel pressure regulator can also fail, leading to many problems. Mercury Marine has been in the business of boating since 1939. Mercruiser 5. KNOCK (KS) SENSORS WHAT THEY DO Detect cylinder block vibrations caused by engine knock and send a signal to the computer to retard ignition timing. The system: 2004 Mercruiser 5. 0 is the workhorse engine for Mercruiser. Top quality rebuilt engines for domestic and import applications. You do not have to increase it manually, as stated in the following steps. 2008 Mercury 15hp outboard (F15M) Not rated yet Hi, Hoping you folks can help me out. Knock Sensor. What Happens When the Timing Is Advanced It has long been held, and demonstrated at the Club's Dyno Days, that advancing the timing to 13 to 14 degrees before top dead centre (BTDC) is a cheap way of achieving lower rpm performance in the Mazda MX-5 1. Started to probe with my stethoscope and found the noise to be worst at the fuel pump. Buy Knock Sensor Switch Sender for Mercruiser Sensor 5. Diagnosing Misalignment and Belt Noise July 30, 2014 at 10:54am. motor ran great. It doesn't ever get better on its own, although when your engine is cold, the noise might be lesser. Volvo Penta is a world-leading supplier of engines and complete power systems for both marine and industrial applications. If the gimbal bearing is not bad you might want to check the magnets on the drain plugs the ujoints will make a knocking noise in turns but no squeal the gimbal bearing shouldn't turn free and still might be the problem under load. Unknown hours but perfect compression and runs great. With today's advanced computer technology adapting to the marine market, the Whipple Supercharger system allows maximum performance to be obtained from a stock engine. How to Get Rid of Engine Lifter Noise by Richard Rowe. Tonight we are going to take a look at what is involved in replacing the harmonic balancer on a V6 Commodore. It causes a knocking or pinging sound, robs the engine of power and can lead to serious engine damage. took it out for the first time last weekend. engine knock when warm If this is your first visit, be sure to check out the FAQ by clicking the link above. Model SE116 replaces MerCruiser's Gen II I/O with Three (3) Year Unlimited Warranty Sale Price From $791. All starters have a $6. Then a loud noise started and I shut it down. 3L MPI ECT 220 HP Fly Out of the Gate. 0 is the workhorse engine for Mercruiser. We ship parts and engines worldwide!* MERCURY PARTS CAN ONLY BE SOLD AND SHIPPED TO ADDRESSES WITHIN THE UNITED STATES. Ok so that's not one of my best Christmas cracker jokes but for one of our Brundall Branch customers up in Norfolk, a strange knocking noise began resonating when their engine was at a low. The knocking or ticking is going to determine if it is in the top end, lifters, push-rod or rocker arm issue or the bottom end that would include pistons or bearings. Mercruiser 470 engine for parts or rebuild complete (kingman) Sold at 200 $ I have a mercruiser 470 4 cylinder engine for sale. 5l with about 170k miles. Make sure oil, filter, drain pan, Lucas, and flush are all ready. Before you know it, the parts are at your door and all you have to do is gather the tools and knock out the project. I have a 2008 15hp Mercury outboard (F15M) that started making a knocking noise. Wristpin noise is loudest on acceleration. 2 MerCruiser is available in two power ratings for skiboats and one output in sterndrive form, the latter being available with. The ECM will retard the timing by as much as 20 degrees in 1 degree increments. Quality Refurbished Lower Units for Yamaha, Mercury & OMC. Spark comes from the ignition system. Your shopping cart is currently empty. The noise seems to be coming from the top of then engine and almost sounds like valve train ticking or possibly low oil level though it has enough oil. As long as you've been paying attention, nobody knows how your engine sounds better than you do, so if it starts to sound odd or even just a little different, there could be a problem. Hg (7 kPa) maximum at idle rpm, 3000, full throttle and back at idle rpm. Before we start we need to look at a couple of things, namely correctly diagnosing a faulty balancer and the tools needed to remove it. DIAGNOSE – ENGINE PINGS OR KNOCKS ON ACCELERATION. It is very possible that there is a bad u joint or an inferior u joint. If the sound doesn't change, look at parts other than the reciprocating ones. If your oxygen sensor has failed, the code checker will generate a diagnostic trouble code that specifically indicates your oxygen sensor is bad. 0L Knocking Sound Folks, Just bought a Maxum Bowrider 1990 vintage with what appears to be the original engine (5000 Hrs) and on my first outing engine ran very smoothly but after about 20 minutes power dropped and a loud knocking sound came from the engine although it was still running. K&N Flame Arrestor 59-5004 for 98-00 Mercruiser 7. The car may also feel rough while idling and the engine may even stall completely at slow speeds. Problem retrieving videos from provider: Not Found 2. And, not always at the same RPM, although, when it is over 2000 RPM in forward in the water or higher RPM you can never. I love this car and it has been very dependable for over 250,000 miles. 7 TBI/EFI engine with a Delco ignition. check your oil and if it's full then you may need to think about either. The difference is that loose valves will make noise all the time, whereas pre-ignition happens on acceleration or under a load. But, from my experience and from others, the 3. Throttle up and it goes away, also out of the water on the ears, there is no knock at idle. Idle Air Control Valve (IAC) for MerCruiser engines with 555 ECM. engine does not turn over using only a 3/8" ratchet. Man, I've heard it - would have sworn it was a valve tap!. Mid 2000's 21ft Trophy with a mercruiser I/O Last time out we noticed a knock in the outdrive but only happens in neutral. Diesel Engines; Marine Gensets. What is Engine Knocking? Knocking in your engine, also described as pinging, can mean one of several problems. I have a video of another guys engine with the same knock as mine but his is much louder. As long as you've been paying attention, nobody knows how your engine sounds better than you do, so if it starts to sound odd or even just a little different, there could be a problem. im pretty sure my gimbal bearing is shot on my 4. MAINTENANCE/SERVICE Check connection and signal from sensor when complaints of engine knock are present. Before you know it, the parts are at your door and all you have to do is gather the tools and knock out the project. Loss of exhaust gas recirculation (EGR) is a common cause of detonation (spark knock) because EGR has a cooling effect on combustion temperatures. 2 MAG Inboard, Sterndrive 2013 The latest evolution of big block engines from the team at Mercury MerCruiser is the Catalyzed 8. One sound is prevelant at idle (Lifters) while the other is under acceleration (Exaughst). Make sure oil, filter, drain pan, Lucas, and flush are all ready. Unknown hours but perfect compression and runs great. Just bought the boat. Hey I have a problem about the oil with my Car When the car is on it's fin but wen I step on the gas the oil comes out from the dipstick and the is like if the Pressure goes up to heads you know we're is the breather for the heads Well from there the oil comes out threes is the leak I'm talking about. Mercruiser Alpha One - funny noise Hi Guys, As pathetic as this sounds I actually put the boat in the water for the first time yesterday. K&N Flame Arrestor Vent Hose Adapter for 3 Piece Assembly. Help!!!! I purchased this boat, 1996 Talari 201, 5. 0 GM Mercruiser Outdrive Engine Noise. They are pretty reliable, just not a lot of upgrade options, but like your going to "soup" up your 4 banger???? If it's strictly valvetrain noise your hearing, you'll be OK. Applications: All Workhorse Chassis Equipt with an 8. A lot can be learned by listening to your engine, so if your car starts to change its tune, you should take heed. ~Read me pleeeze~ For up-front payment total on a remanufactured long block exchange engine, add the 3 figures at the right end of the table rows above. On my 2010 Forester, the Check Engine light, Vehicle Dynamics display light with a line thru it went on and the Cruise control light started flashing today. It almost sounds like a conecting rod but we wont go there. 0 350 Mag EFI 806612T MPI 5. It goes away when engaged, and does not seem to be affected by steering or trim. Ring" wrote in message This is a problem that I can't seem to conquer. What is Engine Knocking? Knocking in your engine, also described as pinging, can mean one of several problems. Who’s Knocking? Engine “knock” refers to uncontrolled and explosive gasoline ignition in the combustion chamber. Mercruiser 5. 0 is the workhorse engine for Mercruiser. com recommends identifying the symptoms of a bad knock sensor and replacing the part immediately. How to Get Rid of Engine Lifter Noise by Richard Rowe. 3 Mercruiser that while idling in gear at trolling speed of 2. Only a single knock, not 1 per cylinder or anything. Email, call or reach out on Facebook for quality customer service to help place your order. K&N Flame Arrestor 59-4541 for Mercruiser 454/502 Magnum. Try and pin-point where the noise is coming from. 2, 806612T Knock sensor for GM Small Block marine engines like Mercruiser, OMC, Volvo, PCM, Marine Power and Crusader. A misfiring cylinder in a four-cylinder engine is, pardon the pun, hard to miss. 0L Knocking Sound Folks, Just bought a Maxum Bowrider 1990 vintage with what appears to be the original engine (5000 Hrs) and on my first outing engine ran very smoothly but after about 20 minutes power dropped and a loud knocking sound came from the engine although it was still running. We specialize in Volvo Penta Volvo Penta engines, outdrives, propellers, and other accessories, but we also carry MerCruiser, PCM, Cummins, Perkins, etc. And, not always at the same RPM, although, when it is over 2000 RPM in forward in the water or higher RPM you can never. Its a faint whine, If it was a gearbox related issue, would the noise still happen out of gear with the clutch down?. com, the #1 full featured boating site in the world. mercury troubleshooting Engine knock, loss of power - Mercury Marine Genuine Mercruiser 496 Mag & question Usually a knocking sound during acceleration indicates. In the version 1. Where is a knock sensor on a mercruiser engine? If you have a code for a knock sensor and you have a noise in the engine, it will set the code. Mercruiser 4. yet the engine still rattles when accelerating and now does it all the time and sounds like #1 or #2 rod knocking and i can see what looks like tiny little metal shavings in the oil on the dipstick. Whether you love driving off-road or on normal paths only, there are two types of knock sensor that you can pick from: Broadband single wire sensor: This is the older type of knock sensor in the automotive market. Put the "plastic" end to your ear, and the tip to different parts of the engine. What you'll hear has been variously described as a hissing, whistling, sucking, gulping or even slurping noise. Go all around the joint including the back side that you can't see. The excessive pressure developed can damage pistons and cause head gasket failure. 67 View Details. It's boating time, and the family can't wait to get on the water. 7L Mercruiser with the dual prop. :huh: One sound is a definate mechanical clatter, the other sound is compressed air escaping. In many cases of rod-knock or piston slap, more than one is banging so even if you eliminate the noise from one rod the other one will still be a-banging away with a different, more singular tone. Left untreated pre-ignition can severely damage an engine. Mercruiser alpha noise. If your Engine is Burning Oil, or if it is causing Excessive Smoke or Blow By, or if it has Engine Knocking, XL Nanolube can help via Engine Detox with XL Nanolube. If your gauges activate but the engine makes no clicking or cranking noise when you turn the key to the START position, you might have a bad In-Gear-Starter-Protection-Switch. Knock occurs when the peak of the combustion process no longer occurs at the optimum moment for the four-stroke cycle. 4 Reasons Why Engines Lose Power Over Time And How To Win Your Horses Back. Our kit includes three EFI cable adapters: #94010Standard Kit (includes 94005 and 94006 adapters) $781. It also doesn't matter if the car is warmed up or not, it is still there. I can run at around 2200 with no noise also. 4 Magnum? Observation: When underway (never on the trailer), at about 3000 RPMs, the Mercruiser engine alarm goes off for the port engine. It causes a knocking or pinging sound, robs the engine of power and can lead to serious engine damage. It is often said that for an engine to run you need fuel, air, and spark. In fact, you'll literally need to pause, because you can usually only hear the problem while the engine is idling. When there is a deep knocking noise coming from within the engine toward the bottom it means there is a broken piston, seized wrist pin, rod bearing or crankshaft bearing that has worn or gone bad. 3 Knocking Noise Ryan B. im pretty sure my gimbal bearing is shot on my 4. Bravo Three Sterndrive Mercruiser Mercury Bravo 3 Mercruiser NEW USED For Sale Melbourne Bravo III Mercruiser Service Repair Engine Diesel Motor Parts Repower. MechanicAdvice) submitted 4 years ago by jc_king0640 Today my 1998 Volvo s70 ran with very low oil for at least 5 miles. If you hear excessive noises or the engine runs rough and poorly you will be doing the procedure again. Listening to the sound it seems to be from the front of the engine ( passenger side) around belts. The knock sensor is located on the engine block, cylinder head or intake manifold. That aside this sounds like a bearing noise more so than just air creating a noise. im pretty sure my gimbal bearing is shot on my 4. Order by Part No. Hi Guys,I have a mercruiser 350 mag/bravo III set up. The exhaust then pushes the water out the exhaust pipe. Abnormal combustion, more commonly known as knock or detonation, has been the limiting factor in internal combustion engine power generation since the discovery of the otto cycle itself. 3 mpi timing chain noise mercruiser 4. We strive to give our customers the right product, with the right qualities. Knocking noise on 7. Get the best deal for Mercruiser 3. If your oxygen sensor has failed, the code checker will generate a diagnostic trouble code that specifically indicates your oxygen sensor is bad. Oxygen sensor failure can often be traced to one of three common factors: Age and high mileage, an internal contaminant (poisoning) or an electrical issue. Vehicle Won't Start or Engine Noises Main Bearing Noise. If your Engine is Burning Oil, or if it is causing Excessive Smoke or Blow By, or if it has Engine Knocking, XL Nanolube can help via Engine Detox with XL Nanolube. After about only 20 hours running time I noticed a whirring and grinding noise from the engine, but only at idle. The system: 2004 Mercruiser 5. 3-97-0000484 : Sensor, Knock Noise Seadoo / Ski-Doo. 5 mph or less makes a horrible knocking sound. When you sign up for a specific newsletter, we (Marine Parts Direct UK) add your email address to a corresponding mailing list. 200 hours Knock sensors are like $50 or so, I spent that much on 4 spark plugs. Call us now for more info about our products: 01202 600596. Volvo Penta AD41 Engine Had A Knocking Noise. Related eBook Available are : Dead Lucky Dci Michael Lambert Book 2,The Ailing City Health Tuberculosis And Culture In Buenos Aires 18701950, The New Bible Cure For Weight Loss Ancient Truths Natural Remedies And The Latest Findings For Your Health Today. Mercruiser 3. The symptom is more pronounced when the engine is at operating temperature. 0 V8 LX knocking noise -Now with vid! The knocking is the thread which is sitting vertical embeded in the piston hitting the head. HEI Distributor Conversion. However she has always made a very audible whirring noise (not a clunking or knocking) as the drive goes close to either steering lock. Its a faint whine, If it was a gearbox related issue, would the noise still happen out of gear with the clutch down?. In many cases of rod-knock or piston slap, more than one is banging so even if you eliminate the noise from one rod the other one will still be a-banging away with a different, more singular tone. Features may include: Durable. After installing a new starter, the car starts fine, but I get a knocking noise. This tool is the choice of MerCruiser and independent marine dealers worldwide. 3 Vortec V-6 developed a loud knocking noise and removal of the valve covers revealed that the engine had a dry side. These are new MerCruiser universal joints. It’s a piezoelectric automotive sensor that produces a small voltage signal when it hears internal engine noise that we often call knock and ping. Mercury Marine has been in the business of boating since 1939. Like many luxuries in life, once you get used to them being there, they start to feel more like requirements than luxuries. One side of the engine was clean and gleaming with oil, while the other side was charred and blacked due to oil depravation. where I could once again hear the knocking from the stern. Engine Knocking. Most the time the gimbal bearing makes almost a growling noise. It seemed like the props were suddenly cavitating and engine revs started to increase a bit as the boat started to fall of plane. We are taking advantage of the processors capability to read analog signals through its ADC - analog to digital converter. Some merchandise may be limited in supply or available only by special order. This noise often has a rapid frequency and is much faster than the knocking noise mentioned previously. A cold engine is a lot more comfortable to work on. The noise you hear is a knock that is heard towards the bottom of the engine. Pretty sure it tracks with engine RPM, though it gets a bit quieter with increasing RPM. 0 MPI User Manual. AmazonBasics Noise Reduction Safety Earmuffs $11. The oil pump inside any vehicle is an important part of the engine's mechanical system and operational health. hello i have a xsara Picasso hdi 2l 2003 plate, my problem is each time i turn a corner (especially turning right) i get a knocking sound as if something is loose, i can go over speed bumps perfect with no noise, its just when cornering and if the corner im turning has few bumps in road its worse. If that's OK, then you're onto the air flow meter. Remove the ports and visually inspect them for deposits that would restrict the water flow. Knock occurs when the peak of the combustion process no longer occurs at the optimum moment for the four-stroke cycle. 90-863757--1 DECEMBER 2001 2001, Mercury Marine PCM 555 DIAGNOSTICS SN 0M000000 and ABOVE SERVICE MANUAL 2. Mercury/Mariner. But I can say that the scenario for a shorted knock sensor (a common failure on Nissan V-6 engines) to cause a fault code P0500 for a Vehicle Speed Sensor would involve a rodent eating wire insulation off of your engine harness causing some crossed wires. Features may include: Durable. Mercruiser 170 470 or 3. Fuel injector symptoms for bad, faulty, dirty, clogged, leaking injectors: poor starting, idle, performance, fuel consumption, failed emissions, detonation. Autopartswarehouse. Hi Everyone! I'm about to order my first boat ever the 2020 R5 !!Im so excited but since Im so new at this I have some questions. Hi Guys,I have a mercruiser 350 mag/bravo III set up. I have a 2008 15hp Mercury outboard (F15M) that started making a knocking noise. a tech article on how to prevent detonation, pre-ignition and knock. The Boating Forum - Knocking / Rattling noise - 3rd trip out in my new (new to me) boat this sunday. 3L does the same, and has for over a year (has 86K miles on it now). Before we start we need to look at a couple of things, namely correctly diagnosing a faulty balancer and the tools needed to remove it. The 240 had to be rebuilt at 290 hours because it dropped a ring and again at 520 hours, I wasn't impressed with the vibrations and noise they had but boy can they scoot. Stop browsing in the dark. If your gauges activate but the engine makes no clicking or cranking noise when you turn the key to the START position, you might have a bad In-Gear-Starter-Protection-Switch. We ship parts and engines worldwide!* MERCURY PARTS CAN ONLY BE SOLD AND SHIPPED TO ADDRESSES WITHIN THE UNITED STATES. It had a slight lifter noise, I added a qt of MMO to the oil, the noise went away. This is much the same as a gasoline engine suffering from pre-ignition or spark knocking. I have a 1989 4. My check engine light is flashing fast all the time. If it is a ticking noise, it will more than likely be a valve train issue. The knocking or ticking is going to determine if it is in the top end, lifters, push-rod or rocker arm issue or the bottom end that would include pistons or bearings. I love this car and it has been very dependable for over 250,000 miles. Fuel and air comes from the fuel system and carburetors. All cars made in 1996 and after are equipped with an OBDII interface. U-joints will make a noise when turning hard to port or starboard. To fix the problem, follow the service procedure below for installing a new tensioner assembly kit. Use an accurate digital vacuum gauge that reads in either in. If the sound doesn't change, look at parts other than the reciprocating ones. The 389 in my 57 Poncho started with a knocking wristpin after a top-end race with a 55 chevy. Unknown hours but perfect compression and runs great. How can I be sure that it is in fact a rod. Try and pin-point where the noise is coming from. Valve train noises generally are loudest up to 1500 rpms. or: Mercruiser Inboard Sterndrive Parts. Hearing the distinctive sound of a jammed valve lifter while you're driving can quickly become dangerous. In the version 1. 1S Horizon DIAGNOSTICS Service Repair Manual SN:0M000000 and Above 1. These converters read a voltage value and transform it into a value encoded digitally. 3L MPI ECT 220 HP Fly Out of the Gate. Re: Mercruiser 4. Now I'm at around 500 hours and it sounds the same. Otherwise this motor has been great.