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Join Date: Feb 2007
Location: Taipei, Taiwan
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Sealant for oil line
Has anybody tried those engine sealants, especially the non-hardening ones like Curil-T, Hylomar, and Threebond 1211 for those oil line joints that tend to weep a bit no matter how tight they feel? If not, do you think it feasible? Thanks!
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'87 3.2 Targa |
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07-21-2009, 03:58 PM
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I just anti-seize the threads so I can get them tight and hope if I have to remove them it might help.
I have been known to put avation permatex on the sealing surface but I ve gotten away from that. Bruce |
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07-21-2009, 06:29 PM
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I wonder how a refrigeration sealant would work in that application.
The stuff I am thinking of is called Nylog. If it works for refrigerants and oil at pressures up to 280 psi and on threaded fitting on the hot side of compressor heads, it probably would work on mating surfaces for oil lines. Disclaimer, I haven't used it for this so take this for what it is or isn't worth... There are two different types. One is a thickened synthetic for HFC refrigerants and the other is mineral oil based. Kind of feels like stringy snot or slug juice.. http://www.refrigtech.com/nylog.html
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Bill K. "I started out with nothin and I still got most of it left...." 83 911 SC Guards Red (now gone) And I sold a bunch of parts I hadn't installed yet. |
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07-21-2009, 09:31 PM
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Do not put any sealant on the fittings, if they are damaged by overtightening they will weep and can be replaced fairly inexpensively and simply.
The problem is you put sealant on the oil line, it seals OK but then a hunk breaks off inside the line, seals up a hole in the cam spraybar and pretty soon that cam lobe is worn out. I wouldn't take the risk, cam lines are cheap.
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07-22-2009, 02:42 AM
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Bill, the Nylog looks pretty good.
John, I meant those big oil lines between the engine, oil tank, external thermosat, and external oil cooler. Maybe I should not care too much about minor oil weeping.
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07-22-2009, 04:53 PM
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If its tight it wont weep, the old lines weep from shrinkage
Bruce |
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07-22-2009, 06:48 PM
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Those fittings are bare aluminum tapered fittings.They seal by direct contact of the taper pushing into the female fitting. Goop will not help and has the potential of contaminating the oil system.
-Andy
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07-22-2009, 07:15 PM
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That is the thing with Nylog, it is oil that has been thickened.
In refrigeration, we use it as an assembly lube for flared fittings and assembling some components that require gaskets. A little goes a long way. Shouldn't be too much of an issue contaminating an oil system with a few drops of what amounts to be an assembly lube for the fittings. Another plus is the fact that it never hardens or dries out and may make dis assembly easier next time around. I agree that using a sealant that has the potential to harden would not be good in this situation.
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Bill K. "I started out with nothin and I still got most of it left...." 83 911 SC Guards Red (now gone) And I sold a bunch of parts I hadn't installed yet. |
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07-26-2009, 11:12 AM
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1983 Porsche SC
