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Greg, Technician
Category: Porsche
Satisfied Customers: 7284
Experience:  Automotive diagnostic tech
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tapping noise on cayenne 4.5 2004 which tends to clear up over

Customer Question

tapping noise on cayenne 4.5 2004 which tends to clear up over 2000 revs but ticking all the time at tick over.
Submitted: 4 years ago.
Category: Porsche
Expert:  Greg replied 4 years ago.
Name is Greg, My goal is to provide you with excellent service – if you feel you have gotten anything less, please reply back,

This sounds like a typical hydraulic valve adjuster's that are not bleeding correctly .

This is due to the following issue .
1, low oil level
2, Incorrect oil used.
3, Bad oil circulation .

What i suggest you do first is check the oil level if low add to correct level.

If level is correct i suggest you do the following before condemning the oil pump ,as low oil pressure will also give you this problem .

But i would tend to go in the direction you have bad oil so do the following first .

Get a good engine flush agent like one from liquid moly .
Add this to the engine oil and then start the engine and let run for 25 minutes at idle .

After the 25 minutes drain the oil and remove the oil filter .
Replace with an original oil filter and Porches recommended motor oil

The retest the tapping should be complete gone or just tap for a few seconds ,if this is the case then do an engine flush on the next engine oil change , do the oil change not more than 5.000 miles , i would personally do this every 3000 miles but with you using full synthetic 5.000 will be good .

If still as bad an oil pressure test should be carried out to make sure the oil pressure is good .

Should you need further assistance with this issue then please get back to me with the reply box below .

Kindest Regards Greg