wastegate noises? UrS4 - Page 4

quattrokid · 28-10-13, 09:03 AM

Thanks Mark

Hanuman · 28-10-13, 10:59 AM

Other sources of irritating noises-

The metal concertina pipe contains a sleeve welded at the top end- hence the direction arrow. The concertina must be flexible, but it still needs to guide gases.
The sleeve can break loose. It rattles inside forever more, or until the pipe/sleeve are removed.

quattrokid · 28-10-13, 11:20 AM

Is changing the waste gate just a case of unbolting the 1 in situ and stick a replacement in, or does the replacement need to be set up ?

Hanuman · 28-10-13, 01:22 PM

At a guess-
Setting up was originally done at factory. After 20 years, the wastegate spring is unlikely to be as it was at the factory, so I can't imagine anything needs to be done. If I was sure I needed to swap the waste gate, then unbolt, and replace.
But it's a bit of a 'job', especially if the bolts are also 20yrs old.

This Odd noise- it's only when you lift off the throttle, any speed, any RPM?

quattrokid · 28-10-13, 01:33 PM

Yes,mostly but even when steady throttle is being applied it will also make these noises... but mostly coming off boost

Turbo was replaced a few years ago, not sure what / if anything was done to the waste gate or existing 1 was simply fitted to replacement ( factory ) refurbished turbo.

Hanuman · 28-10-13, 02:09 PM

Wastegate is not integral or connected to the Turbo on these cars. wastegate at the rear end of the exhaust manifold , turbo in the middle, ish. Unless I'm thinking of the wrong car.

Turbo, item 1. Wastegate, item 10

28-10-13, 09:03 AM	#31
quattrokid 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Ayrshire Posts: 9,654	Thanks Mark __________________ RS4 B5 (wife's / ours now ) S3 8L Imola Yellow S3 8L Nogaro blue UrWR SOLD UrS4 saloon (SOLD again) S4 Cabrio (SOLD) A4 cabrio 2.5 V6tdi (SOLD) 80 cabrio 2.6 V6 SOLD 90 quattro 10v SOLD 100 2.2e SOLD FOUNDING MEMBER the 200,000 Plus miles Club

28-10-13, 10:59 AM	#32
Hanuman Trickster Classic Audi Club Member Join Date: May 2009 Location: Heckling from the cheap seats, Phnom Penh, KoW Posts: 7,025	Other sources of irritating noises- The metal concertina pipe contains a sleeve welded at the top end- hence the direction arrow. The concertina must be flexible, but it still needs to guide gases. The sleeve can break loose. It rattles inside forever more, or until the pipe/sleeve are removed. __________________ I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor

28-10-13, 11:20 AM	#33
quattrokid 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Ayrshire Posts: 9,654	Is changing the waste gate just a case of unbolting the 1 in situ and stick a replacement in, or does the replacement need to be set up ? __________________ RS4 B5 (wife's / ours now ) S3 8L Imola Yellow S3 8L Nogaro blue UrWR SOLD UrS4 saloon (SOLD again) S4 Cabrio (SOLD) A4 cabrio 2.5 V6tdi (SOLD) 80 cabrio 2.6 V6 SOLD 90 quattro 10v SOLD 100 2.2e SOLD FOUNDING MEMBER the 200,000 Plus miles Club

28-10-13, 01:22 PM	#34
Hanuman Trickster Classic Audi Club Member Join Date: May 2009 Location: Heckling from the cheap seats, Phnom Penh, KoW Posts: 7,025	At a guess- Setting up was originally done at factory. After 20 years, the wastegate spring is unlikely to be as it was at the factory, so I can't imagine anything needs to be done. If I was sure I needed to swap the waste gate, then unbolt, and replace. But it's a bit of a 'job', especially if the bolts are also 20yrs old. This Odd noise- it's only when you lift off the throttle, any speed, any RPM? __________________ I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor

28-10-13, 01:33 PM	#35
quattrokid 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Ayrshire Posts: 9,654	Yes,mostly but even when steady throttle is being applied it will also make these noises... but mostly coming off boost Turbo was replaced a few years ago, not sure what / if anything was done to the waste gate or existing 1 was simply fitted to replacement ( factory ) refurbished turbo. __________________ RS4 B5 (wife's / ours now ) S3 8L Imola Yellow S3 8L Nogaro blue UrWR SOLD UrS4 saloon (SOLD again) S4 Cabrio (SOLD) A4 cabrio 2.5 V6tdi (SOLD) 80 cabrio 2.6 V6 SOLD 90 quattro 10v SOLD 100 2.2e SOLD FOUNDING MEMBER the 200,000 Plus miles Club Last edited by quattrokid; 28-10-13 at 01:40 PM.

28-10-13, 02:09 PM	#36
Hanuman Trickster Classic Audi Club Member Join Date: May 2009 Location: Heckling from the cheap seats, Phnom Penh, KoW Posts: 7,025	wastegate noises? UrS4 Wastegate is not integral or connected to the Turbo on these cars. wastegate at the rear end of the exhaust manifold , turbo in the middle, ish. Unless I'm thinking of the wrong car. Turbo, item 1. Wastegate, item 10 __________________ I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor Last edited by Hanuman; 28-10-13 at 02:12 PM.