TDI Rattle Under Load

[mr_walker]

Anybody else get a quiet flutter/rattle in their TDI when it's revving low and under load? It's been driving me nuts, and because I've been straining to hear it for a while now, my ear is tuned in and it seems to be as loud as hell.

I found a post here that seems to describe my Jetta's symptoms. They say it's a heat shield, so I might get my head in there this weekend and see what I can find.

I took it for a drive with the workshop foreman from the dealer, and he had trouble hearing it. He pretty much told me that if I book it in, then there's not much they could do anyway (without a definite fault).

[Spoddy]

http://www.vwwatercooled.org.au/newf...663#post170663

"Clicking Noise"

Something similar?

Hopefully getting to the servicing dealer next saturday (their invite to have a look as I sent them a PM )

[mikinoz]

I have noticed that I get some strange sounds, clicking knocking and grinding, at stopped and slow speeds.

I sourced it to the climate control - as soon as it is off these sounds go away - so it must be expanding/compressing gas?

Not your problem - but sharing anyway

[warb]

yeah, i dont push under 2000rpm, just not worth it, sounds like you need to drop a gear, should be easy with six of them . i got me 30k service this week, and not a prob yet (and i thrash the ringer off the ol' TDI) .. however i do use a little oil between service

[Preen59]

Sounds like you're labouring the snot out of it...

Rev the bloody thing. Contrary to what some people think, labouring an engine is FAR worse than revving it high. Keep thing thing up in the revs and on boost, much better for everything. Between 2 and 3.5 thou is the go i think.

[mr_walker]

Thanks guys - it's the DSG, which I don't have much control over when in auto mode. It seems to shift up pretty early, and when cruising at 80 it will shift to 6th. This is where I first noticed the noise: doing between 70-80k's, DSG shifts to 6th, revs drop to about 1200. If I knock it back a gear in manual mode and increase the revs, it's all good.

I know the DSG is meant to "learn" your driving habits, but mine doesn't seem to want to budge on this. If you continually knock it into tiptronic mode when it's doing something you don't like, does that "train" it?

[motk]

yeah, i dont push under 2000rpm, just not worth it, sounds like you need to drop a gear, should be easy with six of them . i got me 30k service this week, and not a prob yet (and i thrash the ringer off the ol' TDI) .. however i do use a little oil between service

The 2.0 TDI engine has max torque at 1750 RPM, so I don't think that that should trouble it too much - haven't noticed any unusual or obvious symptoms of labouring in ours. DSG is smart enough to knock it down a gear when needed, it seems.

[cetane]

Don't want to introduce a new variable, guys... and my knowledge of PD computer-controlled engines is scant...but if this were an IDI motor I would suspect a dodgy injector. It's worth investigating anyway.