Noisy TDI?

TDIMAXIMA said:

...why does it only do it when hot?

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Because the exhaust system components expand when they get hot. You've likely got something barely touching.

dave3dg said:

Do any of you learned M8's know if the valve swaps U are discussing applies to UK / Europe cars as my A3 does the same but I must say I was under the impression that the noise sounded a bit like the transmission groaning @ low revs?

regards,

dave3dg

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Silence was the answer to my question, Maybe us Brits are not welcome on this forum?

Ive just discovered that my motor is burning more oil then I would like. Maybe .25L every 1000km's. So, my noise may be the cat.

whats the sender your all mention the n18 are they on all tdis my 1.4 is doing the simular sort of thing

Dave3dg: us brits are very welcome on here, and all the engine bits are virtually the same, bar items related to emissions many!!

the N18 valve is the one that controls the EGR valve, I have had the seals damage and allow uncontrolled vacuum to the EGR controller

2 ways I know to test,
1: swap the valve with the one that controls the turbo (n75) and you should notice a difference on start up
2: undo the pipe from the exhaust to the EGR valve, and block it with either metal plate or even some cardboard (not to be driven on!)

Well, I have recently changed my pressure hose that connects to the egr with the c ring clamp. That pretty much fixed my problem with the rumble at low idle, and the rattle at 1800-2000 rpm. One of the teeth on the hose was slowly coming off, causing the rattling. Finally, when it broke completely, I noticed alot of nose and loss of power. I changed the hose and done.

TDIMAXIMA,

Which pressure hose are you talking about? The elbow joint hose that connects to the egr and intake (above the timing belt area)?

This is the one that I know has the C ring clamp that holds it to the EGR (by the anti-shutter or shutoff valve).

I still suffer what I think to be the rumble noise you speak of.

Tom

Yes, that hose. Check to see how much play you have.

It does have some free play at the C-Ring/EGR side of the pipe. Hmmmm.....

All im saying is it helped me. Its not gone completely, as Im sure what caused it the first time will do it again eventually.