Turbo Exhaust manifolds

[steveb@falcon.kla.com (Steven Buchholz)]

... I don't know WHERE I got the "3" piece EM from ... I meant two-piece!

In any event it appears that the major issue is the positioning of the 
wastegate on the EM, and I would suppose that this might affect the 
corrugated tube as well.  The 2-piece EM was designed for the later turbo 
engines, and I have noticed that on the '88 5k turbo the WG is mounted 
farther aft and oriented farther away from vertical as compared with the 
QTC.  I really wonder if it will be possible to bolt in the 2-piece on 
an urQ without including some of the exhaust system of the 5000 as well.
I think I'll try to compare the corrugated tube and exhaust systems on 
both this evening ... I didn't hear from anyone that had BTDT.  

IMO the studs breaking is caused by the warpage of the manifold, not the 
differences in the coefficients of thermal expansion between the head and 
manifold.  My experience certainly supports the "get the manifold resur-
faced and you won't have any further stud breakage problems" theory.  I had
the manifold resurfaced >6 years ago and haven't had a problem since ... 

Steve Buchholz
s_buchho@kla.com
Department of Redundancy Department
San Jose, CA (USA)