Thread: Excessive tappet noise on cold start-up
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Old Nov 17, 2010 | 03:55 PM
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Bladecutter
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From: Arvada, CO
Default Re: Excessive tappet noise on cold start-up
Originally Posted by gurudog
My 2005 with 15k miles and newly changed oil is now 'tapping' erratically at start up. After reading all threads...maybe overfilled? Or valve lifter clatter?
Is there any sort of additive to add to synthetic oil that may reduce this problem without ruining something or other? Old school there were 'valve noise reducers' available at cheapo auto stores.
Don't add any additives to the engine oil.
They usually do more harm than good.

You should double check the work that was done.

Check the oil filter housing to see if it's leaking.
That's the most common place for leaks on these cars.

Check the oil that was placed in the engine.
If you did the change yourself, you should know what the oil was you put in.
If you brought it to a shop, you will need to call them, and ask them what they put in your car.

After that, you will need to figure out if it really is the lifters making noise on your car, or if it is actually the fuel injectors you are hearing. They are very loud on these cars.

Typically, the lifters are only heard for about a second or two on a cold start, then they quiet down after they are pumped full of oil again. An engine stethoscope would be very helpful in tracking down where the noise is centered at.

BC,.
 
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