[Vwdiesel] 02 TDI, faint tapping when under load

[brian hoeft]

What kind of mileage is on it? Could be lifters but could also be an
exhaust leak..

Just fixed up an ALH for someone spent an embarrassing amount of time and
money going the DIY route. In the end, it appears that it really just
needed a fuel filter and exh. mani gasket(s),, and put together properly...



On Sun, Dec 18, 2011 at 6:52 PM, Stephen Sherman <spsherm at msn.com> 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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-- 
*       -Brian*
      [blinders off&ear <http://208.53.138.125:8068/>plugs out]