[928uk] 928S4 Left Exhaust Manifold Split

[Paul]

Sorry to hear of the manifold failure

Unfortunately it didn't seem very easy to remove or fit manifolds with the
engine in situ, so when I had to remove the heads I did so with the
manifold attached, and likewise when refitting

https://thumbsnap.com/i/n5PG7Jy5.jpg

I hope there is a way to do so, but the risk of snapping studs seems quite
high

Good luck

Paul
87 S4 Manual

On Mon, 1 Aug 2022 at 21:47, Stuart via 928uk <928uk at lists.928.org.uk>
wrote:

> Exhaust manifold split just aft of the corrugated section of manifold on
> underside.
> Is this metal fatigue and how easy is it to replace left side manifold
> with engine in. Looks like access by removing her belly pan.
> Any experiences on how to free the 12 manifold nuts without shearing the
> studs.
>
> The other question I have is I can clearly see exhaust silencer wadding
> pushing through the split. Would this have come from a blockage in the
> first silencer section somehow due to back pressure?
> Or has the exhaust got blocked and cause the manifold to spit at its
> weakest point?
> All in all not a great result.
> Was thinking about changing the first silencer section as a precaution too.
> Right side manifold  looks O.K
>
> Best
>
> Stuart
> 928s4 recommission now MOT’d and back on the road (nearly) after 22 years
> laid up.
>
>