[Vwdiesel] 02 TDI, faint tapping when under load

[Matt Alkire]

My '01 Golf TDI had a similar tapping when it got over around 200K miles.  When I had my last timing belt changed, I also had the lifters swapped out.  The tapping noise went away.

Over time, the lifters start making racket.  How many miles are on your new-to-you Jetta?

-Matt
http://matt_lisa.home.sprynet.com/

On Dec 18, 2011, at 6:52 PM, Stephen Sherman wrote:

> My new to me 02 Jetta TDI has a faint tapping noise which has me concerned. I've had a few people listen to it, and opinions vary, some thinking it is in the dash, others (including me) thinking it is coming from the engine or drivetrain.
> 
> Symptoms are that when the engine is under load, accelerating or going up hill, there is a faint tap, tap tap noise.  If you let up on the go pedal, the tapping stops immediately (so it doesn't seem like it could be wheel/tire related), and resumes as soon as you push on the pedal again.  It does not tap if you just have it in neutral and rev the engine, no load.  The frequency of the tapping varies a bit but is generally in the 5-10 taps per second range (just rough counting here). I've tried to notice if it changes frequency around gear shifts (auto tranny) but have not gotten anything conclusive.
> 
> I have tried listening with a mechanics stethoscope, but did not hear anything that seem to be it (again doesn't tap when not under load. I have checked the CV joints, and no obvious play in any of them.
> 
> Any other things to check out? Ideas on what it might be?
> 
> TIA
> 
> 
> 
> 
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