… It sounds like an oil starvation issue where the motor isn't receiving proper lubrication for the first few seconds (hence the audible knock), then once lubricated quiets down. Many of them indicate minor problems with which the car can peacefully “coexist” for a long time. Whats the fix? The sound goes away when the lifters pump up. … I drive ~750 highway miles a month and hope I can get this car to last a few years. If you were knocking real bad from detonation it would always be there and would not be affected by engine temperature. Listening to the audio it sounds like there’s stuck lifters. Some of the above vehicles may exhibit an engine knock noise that begins in the first 19,000-24,000 km (12,000-15,000 mi) of use. Your email address will not be published. Engine knocking is produced when the car’s fuel burns unevenly. Mar 17, 2017 #20 Are you going to check the oil again @domm92? It is louder on the bottom of the engine compared to the top. The key won’t go into the ignition. Rod knock occurs when the bearing has been partially or completely destroyed. How to keep the car interior clean with little money, How to get rid of the smell of cigarette smoke from the car, Guide for checking a used car before buying. 27 Posts . The characteristic sound in the engine also indicates that there are. If you hear a ticking sound, the problem could be a lack of lubrication in the combustion chamber. The sound can either be from a hydraulic valve lifter, or … It sounds like a rock being knocked against a hard surface. It is possible this has been going on longer than the recent oil change, as I can’t hear it in the car. will go and pic some of that stuff up and try it out. Sound to me like valve clatter caused by weak lifters. Both looks cost me $70. NorthernEX-T Senior Member. I can only hear the knocking if I am outside of the car, if I am in the car I can’t hear it at all. I haven’t had any engine issue or power train problems since owning this car (had to replace strut assemblies and hit a deer but those are unrelated). Follow the directions on the can and see if the lifter noise goes away. Hello, first thank you for your time. This sound is characteristic of a worn connecting rod hitting the crankshaft neck. The rod knock you speak of, would it just do it only on a cold start and only for 20-30 seconds? If coolant is leaking in the oil will look like a milk shake and as with the gasoline, the oil should be changed immediately and the problem investigated. If the piston is sufficiently worn, it can also make a tapping sound during operation. Asked by moofar26 in Ramsey, IN on . Run 5w-30 in the engine to help the cold oil get thru the … Rod knock or a spun rod bering (s) will be there all the time no matter what the engine temperature. A cold knock is usually caused by piston to cylinder wall excessive clearence. Is this the 3.4L OHV V6? An experienced mechanic should be able to tell its signature sound immediately. Rod bearing knock can come & go… but it’ll get worse over time until the bearing fails completely. i have 2003 neon/sx2.0 with almost 58000 kms, recently i started hearing engine knocking when its cold in the morning. It might help too if you could record the sound as the engine is revved and post it here. The tick noise may last from two seconds to ten minutes. you are having the knock for 20-30 seconds on cold start? And when the dipstick indicates that the engine is overfilled there is a possibility that gasoline or coolant is leaking into the crankcase. I have a 2002 Pontiac Grand AM GT with 151,000 miles (I have had the car for 6,000). It’s done this for years. That is really the only thing different about the car, but I know things can happen for any reason especially with that many miles. I thought rod knock was continual and gets more progressive as you speed up? There is no odor of gasoline and coolant is not is not getting into the engine. To listen more carefully to the engine sounds, car owners often use a technical type phonendoscope device. At least in my parts there are always neons for $500. There are a lot of reasons for the appearance of noise in the engine, including knocks of various types. There are quite a lot of reasons for the occurrence of knocks in the engine. i have checked the oil and it is fine. 07-30-2005, 11:36 AM. Posting an audio file here might generate some ideas too. the sound is only present when starting a car cold and driving and not when idle, and will disappear after the engine is warm, no noise if coasting and only on acceleration. Thanks to this, with careful diagnostics, you can not only identify the cause of the engine malfunction, but also eliminate it in a timely manner. I would suggest that you start using 10w30 in the future. We can tell a lot better when it's on the stick.. "People are very cruel to things … It is only bad when it is first started. Damaged pistons move freely, as if “walking” in the cylinders, causing a characteristic metallic sound when the “skirt” hits. My car still has the knock. It began with only doing this when it was very cold (negatives or single digits). Perhaps there is an imbalance in the air to fuel mixture, resulting in the gas burning unevenly. The ticking noise appears when the engine has been off for more than 2-hours. March 24, 2013. One of these signal is a knock in the engine when cold. When there’s wear on the … Timing belt vs timing chain. 2005 Dodge Neon. i understand that it is always best to have a pro look at it, but is it really worth it for a $500 car? What is causing the knock? I drained some of the oil. If I press the accelerator (when in park) the knocking goes away, and if I let off the accelerator then it comes back. And that is usually a much better situation, @Samsus. Can you post a sound file so that we can hear it? When an engine knock is most pronounced when releasing the throttle a “rod knock” as in Rod Knox, is indicated. I think it is lifters like one of the replies suggested. Sounds like piston slap, it's about the only 'knocking' noise that completely goes away when warmed up. July 4, 2016, 8:25pm #1. Who: 2003 Toyota 4Runner SR5 V8 AWD automatic What: Engine knocking sound Where: Omaha, NE When: This happens when I first start my car, typically in temps around and below freezing, there is a slight knocking sound. It's not normal knock - it's pretty damn loud. Stuck lifters will cause valve clatter in the valve train until the oil reaches them and pumps them up. Rod bearing knock will, when you rev it by hand under the hood, become a hard rapping sound. Required fields are marked *. It goes away once the engine is warm. I had the same problem, it ended up being the tensioner going bad! http://seafoamsales.com/sea-foam-motor-treatment/. This is actually quite normal and is a "feature" of the oil paths in the engine. ckostas. engine knocking only when cold. It sounded terrible like a valve noise for a bit then would go quiet. In short, I’d suggest having an old timer look at it. It will hold this RPM stable for around 30-60 seconds before slowly bringing the revs back to a more normal 800 RPM. It just seems weird that there are replies here for a car worth $500 to have a pro that is going to cost $50-$100 for a diagnosis. Car(s) 17 Type R Vehicle Showcase 1. I probably would have never heard it but I just happen to start the car and needed to grab something from the garage. Discussion Starter • #1 • 1 mo ago. I just wanted to be sure I'd eliminated the possibilites before I fit the … Any car owner is happy with the smooth, correct, almost silent operation of the car engine because this indicates its fully operational. Hard to tell though. I know I should do all the routine maintenance when getting a used car (spark plugs, etc), but I bought from a friend who put spark plugs on maybe 25,000 miles ago. When the car is first started from stone cold, the engine appears to make a random knocking / tapping sound which is difficult to locate. @lbstefanski … diagnosing engine noises is what pro mechanics are especially good at. I will switch the oil weight and see how it likes this. Save my name, email, and website in this browser for the next time I comment. It just seems weird that there are replies here for a car worth $500 to have a pro that is going to cost $50-$100 for a diagnosis, Powered by Discourse, best viewed with JavaScript enabled. What Causes Engine Knock? What is the time frame I should repair this? ive only had … Advantages and disadvantages, Cloth vs leather vs Alcantara car seats. they learn by the school of hard knocks … no pun intended … lol …. After one year or so I started hearing a weird knocking noise coming from the engine when the outside … Volvo Mechanic: Ryank, Volvo Master Technician replied 11 years ago Yes, that sounds like the propeller shaft.Only does it cold and when driving. Some knocks indicate only minor problems that can be easily diagnosed and corrected. What to chose, Car Air Purifier Ionizer 3 in 1 - Safe Wide Input 24V - 12V Plug-in Car Air Freshener Ionizer With Dual USB Fast Charger 3.0 QC & Digital Display - Removes pollution, Cigarette Smoke, Pet And Food Odor, Ionic Ozone Air Purifier For Car - USA Seller (Black), Drive Auto Products Car Cargo Trunk Organizer, Folding Compartments Are Easily Expandable To Suit Any In-vehicle Organization Needs, Secure Tie-down Strap System, Made Of Durable Oxford Fabric (Black), BDK PolyPro Car Seat Covers, Full Set in Solid Black – Front and Rear Split Bench Protection, Easy to Install, Universal Fit for Auto Truck Van SUV. Various knocks in the under-hood area can be caused by various breakdowns of attachments and units, such as the water pump generator, timing, etc. And when the dipstick indicates that the engine is overfilled there is a possibility that gasoline or coolant is leaking into the crankcase. What is the cabin air filter and why is it important for our car? 1 Posts . I don’t drive it much (usually down to the creek and back for the dog, and 25 miles for a trip each month). However, if your car produces rattling, ticking, or knocking sound, it could be a sign of engine trouble. I once took my car to 2 places at they both said it was the serpentine belt and ended up being the timing belt. Dear Tim: It is not unusual to hear some engine when first starting on a cold start. The design of the engine implies the interaction of many parts and components that are subjected to quite significant loads during operation. Use it year round, a synthetic 10w30 will help with cold winter starts. Username Post: cold engine knock.. (Topic#205455) chevySilverado97 Member Posts: 184 Age: 37 Loc: Minnesota Reg: 08-24-06 a low down in the engine … 10 Posts . To free up stuck lifters you want to add this to the engine oil. The occurrence of any sound is because one element of the internal combustion engine hits another, while each of the impacts may have its sound, intensity, duration, and frequency. Piston slap is also a possibility. I just don't know why it only happens when the engine is cold. i won;t hear the noise again the through out the day. after that it doesn't seem to be as prominent, but i can still hear it ever so faintly. One of these is the tapping noise of rod knock. So far it seems pretty good, have only had to change the ECT sensor and thermostat on it, suspension bushings still look good. Than 2-hours s wear on the can and see how it likes this the. Throttle a “ rod knock occurs when the dipstick indicates that the engine when may. 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Not work hatchback which i bought new ( 1.6 gasoline engine ) as requested longer to get pumped critical!

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