Corroded water coolant lines

5.0 V10 50v biturbo - 571 bhp
Jim Haseltine
4th Gear
Posts: 902
Joined: Mon Jan 04, 2016 2:26 pm

Re: Corroded water coolant lines

Post by Jim Haseltine » Sat Jun 22, 2019 9:43 pm

On mine it looked like it was the seal at each end of the shaft cover but the one at the chain drive end was much the worse of the pair.
The one that usually leaks is N 904 608 01 which is now a wallet busting 77p, the other is WHT 003 731 and is £10.66.
But when you take into account all the other seals and bits & pieces that it's sensible to replace as part of the job you're looking at well over a hundred quid in parts. You CAN get the pump off without removing the engine but putting it back is a bark of a job - it's a little easier if you have the LH exhaust manifold off and can release the air con compressor bolts enough to allow it to be moved around a bit - but not much easier.

c3nturi0n
3rd Gear
Posts: 467
Joined: Tue May 29, 2018 10:50 am

Re: Corroded water coolant lines

Post by c3nturi0n » Sun Jun 23, 2019 9:55 pm

Jim Haseltine wrote:
Sat Jun 22, 2019 9:43 pm
On mine it looked like it was the seal at each end of the shaft cover but the one at the chain drive end was much the worse of the pair.
The one that usually leaks is N 904 608 01 which is now a wallet busting 77p, the other is WHT 003 731 and is £10.66.
But when you take into account all the other seals and bits & pieces that it's sensible to replace as part of the job you're looking at well over a hundred quid in parts. You CAN get the pump off without removing the engine but putting it back is a bark of a job - it's a little easier if you have the LH exhaust manifold off and can release the air con compressor bolts enough to allow it to be moved around a bit - but not much easier.
cheers Jim - thx for the info.
2008 RS6 Avant (Monza Silver)
- Stage II MRC tune with gearbox (720PS/850Nm)
- MIJ Powerflow exhaust (non-res)
- H&R ARBs

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