I have a 90 NA rebuild kit with the rebuild currently underway. In the kit there are 7-8 o-rings I don't recall seeing during disassembly. They are about 17-18mm OD. They are not part of the tension bolt o-rings or dowel pin o-rings because I have those separated. Anyone familiar with these?

 

Oil filter pedestal? Dowel rings or front cover rings.

 

Good guess, but no. I have the oil pedastal rings installed and dowel o-rings separated. I think the front cover only has two o-rings (white teflon o-ring and black rubber o-ring).

Only thing I can think of is maybe they are for the plastic fuel pieces in the intermediate housing and intake?

 

There should be like 3 or 4 of them. Rear Iron Oil passage seal to the housing, center Iron Oil dowel passage and front iron and front cover oil oring, I forgot to put the teflon one in..

 

Looks like one goes to the hub bolt. Still searching for the other locations.

 

I think the mystery is solved. I pulled a bleed socket (not easy) and the o-ring matches up. There were 8 unknown o-rings and the intermediate housing bleed sockets take 4 total o-rings, and the ones in the intake manifold take 4 total o-rings as well. Now I think I can begin the engine assembly.

 

Well. I must have cheated on my rebuild.. Because i dont know what the hell you are talking about.. Or i forgot to do mine.. this is a 13b right?

 

13b na