Oil lines leaking at thermostat.

[crashmy911]

This is after top end rebuild. Is there anything I can put on the end of the lines so they don't leak. They were very hard to get apart and I had to use alot of heat and penitrating oil. What can I use on the threads to get a better seal?

[Jim Sims]

These fittings don't seal at the threads; the threads are merely a mechanical element to pull the inner spherical profile metal to metal sealing surfaces together. Put nevr-seize on the threads to enable easy future dis-assembly. Check the inner spherical sealing surfaces for debris, scratches and gouging. If scratched I would attempt to polish them out using a circular motion. If scratched it may be possible to butter the sealing surfaces with something like Loctite 574 (orange sealant used to seal case halves) and effect an oil tight seal. John Walker likely will have better suggestions. Jim

[Formerly Steve Wilkinson]

I had the same problem, and after consulting with an extremely knowledgeable Porsche guy--my friend Steve Weiner of Rennsport Systems, in Portland, Oregon--it became obvious that there was no magic elixer I could put on the threads, no Bars-Leak sort of stuff that would work, no amount of pressure on the wrenches that would fix it. What matters is that the compression fitting be super-clean and absolutely free of even the slightest speck of dirt or interference. Take whatever leaks back apart, clean it totally--both ends--and put it back together. You'll need the special oil-line wrenches, which have ends that allow you to put a pipe extension of some sort on them for increased leverage, because although extreme torque won't fix a preexisting leak, you will need to compress the fitting with more force than you'll get out of a couple of ordinary wrenches.

Stephan

[crashmy911]

Thanks these lines are driving me crazy. But I didn't know that the threads weren't where they seal so I will try cleaning them.