Quote:
Originally Posted by CBRacerX
NEW LIST (I've lost the ability to Edit Post #1 since it is from 2008...)
Outer Case Halves: Threebond 1104 (now 1184)
Bearing Saddle Surfaces: Loctite 574
#8 Bearing (balancer end) O-Ring: Threebond 1211 (now 1215)
Case Thru Bolts: Dow Corning 111 on Green Viton O-Rings
Flywheel Seal: DRY
Balancer Seal: DRY
Intermediate Shaft Cover to Case: ThreeBond 1211 (now 1215)
Oil Breather Cover to Case: ThreeBond 1211 (now 1215)
Cylinders to Case: Curil K-2 or ThreeBond 1211 (now 1215)
Cam Towers to Cylinder Heads: Threebond 1104 (now 1184)
Cam Chain Housings to Case: Threebond 1104 (now 1184)
Cam Chain Housings to Cam Towers: Threebond 1104 (now 1184)
Cam Chain Housing Cover to Cam Chain Housing: Threebond 1104 (now 1184)
Gaskets: Thin coat of Loctite 574
Thanks a lot folks, I really appreciate the feedback!
EDIT: Most Popular solutions for sealing added to each item above to include superseded items.
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As a professional Porsche engine builder with 30 years experience and over 400 total builts, I can attest to the consistency of this process.
Although many builders find the LocTite on the main bearing saddles to be unnecessary, we find that it adds a definite shear strength at the case joint. This shear strength helps prevent case shuffle. (Not as well as shuffle pins but better than no adhesive at all.
The Dow O-ring lubricant (55 or 111) does exactly what it was/is designed to do. It lubricates the o-ring preventing tears during installation and after the engine/ sealing surface reaches operating temperature, there is a chemical reaction that swells the o-ring filling any void around the sealing surfaces.
The o-ring during operation is constantly in compression, never tension.