Swagger93

It seems no one believes me that there definitely are two varieties of the two-piece crossover pipe. Hopefully someone here can expound on the specifics of the two types so the information is clear for future rennlist inquiries.

Some asswipe stole my $1000 digital SLR from a party at my house (senior in college), but I was able to go on Ebay and find pictures of the two variations.



Who would paint this blue, honestly.



You can see that the male/female arrangement on the wastegate short pipe to crossover connection is reversed between variations. I first encountered this when helping a fellow '86 owner change his seal ring; his has the male end on the crossover.

My hypothesis is that one variety is from a certain date and after. I'm assuming the difference between my and my friend's 86 cars deals with the time in which the two-piece retrofit was performed, as they are both earlier '86 cars.

Tom M'Guinn

The TSB says this:

8711
September 21, 1987
During the 1986 and 1987 model year several modifications were made to the exhaust system of the 944 Turbo prior to engine number 45H01768. The purpose of this bulletin is to aid you in identifying the latest style components and determining which parts to replace. In addition, removal and installation procedures and some important repair hints are also included.

This information is arranged in the following manner:

Part A - Modification information

Part B - Parts information

Part C - Repair information

Part A - Modification Information
Exhaust Manifold Cylinders 1 and 4. Has new expansion element and modified flanges.

Exhaust Manifold Cylinders 2 and 3. Has modified flanges to adapt to exhaust manifold 1 and 4.
Shield A recess is added for expansion element.
Exhaust Cross Pipe Has new removable pipe for wastegate and one piece flange for manifolds.

Note: As interim production, exhaust cross pipes with removable pipe for wastegate only and previous 2 piece manifold flange were installed as of VIN 95HN151297.


Part B - Parts Information

Only new style parts are supplied for replacement. They are delivered as kits, Part Number 000 043 076 01, which includes the following:

Exhaust Manifold 1 and 4 951 111 131 05
Exhaust Manifold 2 and 3 951 111 133 04
Shield 951 107 065 02
Exhaust Cross Pipe 951 111 096 09

These parts are also available separately under their respective part numbers.
The following gaskets and seal rings must be ordered in addition to the exhaust manifold kit.

Gasket - Exhaust 944 111 196 00 (4 required)
Seal Ring 944 111 205 04 (3 required)
Seal Ring 931 123 195 00 (1 required)
Gasket - Intake 944 110 163 00 (4 required)

420WHP944

Good dectective work swagger 93! I've just recently repaced my crossover pipe and it was the same as arragement as the bottom pic.

Tom M'Guinn

Perhaps the note about interim production up to VIN 95... explains the pipe in the lower picture above? At any rate, it still looks like someone welded up your little pipe, but happy to be enlightened otherwise.

Swagger93

Yeah, mine was definitely welded by the PO, effectively ruining it because it placed undue stress on the other flange. The TSB is a little arcane; I wonder if there is more info somewhere else. I wonder if Ian at 944Online would know?