Exhaust manifold interchange ? (non-turbo)

[Phil Payne]

> I'm concerned about maintaining all the supporting bits of the exhaust
> system ... hangers, engine mounts, etc in order to avoid more problems like
> crscked manifold .  Would my broken studs be caused by warping of the
> single piece manifold?  If so, would  the two-piece eliminate the problem..
> similar to the MC engine where Audi developed a two-piece manifold for this
> reason?.

Audi realised quite early on that they had a manifold cracking problem.

E.g., on the Type 44, if you check ETKA then it seems the only option is a two-part.  But as
far as I've been able to determine, the two-part was never fitted by the factory.

Lots of people have cast around looking for the problem.  Dialynx in the UK, for instance,
produced a pattern manifold using different metallurgy - more ductile and less brittle.  But -
in the end - a VICIOUS stud-puller on MB and MC engines.

I'm convinced - and with advancing years yet more convinced - that the key to the whole issue
is the right-hand engine mount.

--
  Phil Payne
  http://www.isham-research.com
  +44 7785 302 803