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Knocking and pinging are two separate things. "Knocking" usually refers to the sound an engine makes when internal mechanical parts, such as piston rod bearings or connecting rod bearings, begin to wear and cause a deep "knock, knock, knock" sound during engine rotation. "Pinging" refers to the tapping sound you get upon acceleration, either when using fuel that is to loo octane for the vehicle, or when static timing is set too far advanced, or when the cylinder heads are overheating due to clogged water channels or thin oil.
If you are hearing KNOCKING on the left side, it is likely time for an engine rebuild. If you are hearing PINGING, you may need a better grade of fuel, or you are way overdue for either an oil change or a major tune-up.
Hi there? check the oil level. if there is no oil in the engine, it will make it nock especially at the top end.
If the oil level is ok then start the car and remove the oil top up lead and check if there's any oil coming up to the top of the engine. it should pray oil out of the hole. good luck..
Is the knocking a regular rhythm that is proportional to the speed of the car? Driveshaft center bearings generally drive you crazy with buzzing and grinding before they get to the point of knocking, but I suppose that is possible. Drive shaft and rear end bearings would not make noise as you start the car, however.
Is the knocking related to road surface or braking, and is it directly below your feet? If so, it is the control arm bushing. That part is bolted to the bottom of the car directly beneath your feet and it will knock when the rubber part fails and crumbles out. This is common on a car this old, but this part also would not knock as you start the car.
A knock when you start the car is more likely the exhaust pipe hitting the bottom of the car. This can happen if a bolt is missing from a hangar, or the pipe is bent, or an engine mount is broken. The engine mount on the passenger side is the easier one to see from the top, and is usually the one that breaks first, as I recall. I always suggest that engine mount replacement be left to professionals. That job is a good way to loose a finger.
Be sure and check the bolt in the bracket right at the rear of the engine. For some reason, this one works loose and the bolt falls out. You have to crawl under the car to see if that bolt has fallen out.
Another suspect is the transmission mount. Does the shifter move as you step on the gas and let off the gas?
Alternator knocking ????is the alternator light on is it charging as is almost impossible to get a knocking out of a alternator and it still charge at the same time.
Start engine ind get a small plastic tube and put it on the alternator and put your ear to it and you should hear the noise real bad.
And you should feel it getting real hot after run for 3 minutes if not its not ALTERNATOR
If it has a true knock it could be a spun bearing or piston wrist-pin,this being the case you'll need to get in to the motor. One way to locate the issue, as to what cylinder, is to run the engine at idle in park with E-brake on; remove and replace one at a time the spark plug boots. If you find by removing one boot from a plug and the knock sound drops out this could most likely be the cylinder at issue. I hope this may have helped,
It sounds like you may have some sludge in your oil. When the engine is cold the oil is thicker and takes a while for the oil pump to pump it through the engine. The next time you change the oil. Do an engine oil flush first to clean the inside of the engine and ports. If this does not work you might have to have the oil pump checked. There is no need to worry as long as you have oil pressure and the knocking stops. I hope this helps. Don't forget to rate this answer.