 Pushrod tube seals, wet or dry? |
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| Queenie |
 Sep 30 2003, 02:53 PM
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#1
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Society Is A Hole  Group: Members Posts: 383 Joined: 14-July 03 From: SLO-CA Member No.: 908  |
When installing the pushrod tube seals, do they go in dry or do you use a dab of oil or some sort of sealing compound?
Thanks! |
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| Mueller |
Sep 30 2003, 03:01 PM
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#2
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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I use a dab of engine oil
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| need4speed |
Sep 30 2003, 03:10 PM
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#3
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Member Group: Members Posts: 339 Joined: 11-April 03 From: Arroyo Grande, CA Member No.: 564 |
I don't know if this is a good idea or not, but the local dune-buggy shop in town uses gorilla snot (3m Super Weather Strip Adhesive). I imagine if you got any little bits inside, they might block some of the smaller passages and prevent proper oil flow. But these guys have been fixing aircooled VW's for 20 years, so they must know something. . .
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| MarkV |
Sep 30 2003, 03:25 PM
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#4
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Fear the Jack Stands Group: Members Posts: 1,493 Joined: 15-January 03 From: Sunny Tucson, AZ Member No.: 154 Region Association: None |
You do not use adhesive or sealer on the pushrod tube seals. You can use some lithium grease or engine oil. If you glue them in they will leak.
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| dsmeyer |
Sep 30 2003, 03:30 PM
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#5
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'73 914 2.0 Group: Members Posts: 134 Joined: 30-September 03 From: West Michigan Member No.: 1,210 |
QUOTE(Queenie @ Sep 30 2003, 04:53 PM) When installing the pushrod tube seals, do they go in dry or do you use a dab of oil or some sort of sealing compound? Thanks! In Bruce Anderson's 911 book he writes... "Lubricate the O-rings with a silicon paste or grease-type lubricant. Dow Corning 111 compound works well here. The advantage of the silicon paste or grease over petroleum grease is that it will withstand very high temperatures and will not run off. The reason for lubricating these O-rings is so they will reseal themselves anytime they have been disturbed by thermal expansion of the engine. Do Not use silicon sealer in this application. These O-rings, by design, must be free to move and work to do their job correctly." Bruce is talking about 911 oil return tubes, but 914 pushrod tubes work the same way. |
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| Queenie |
Sep 30 2003, 03:36 PM
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#6
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Society Is A Hole Group: Members Posts: 383 Joined: 14-July 03 From: SLO-CA Member No.: 908 |
QUOTE(dsmeyer @ Sep 30 2003, 01:30 PM) In Bruce Anderson's 911 book he writes... Ah, that's perfect. Thanks, Don! I shall convey all recommendations to my mechanic when he calls me back. He neglected to take his laptop to the "job site" with him this morning, or he'd've posted the query himself. (IMG:style_emoticons/default/smile.gif) |
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| MarkV |
Sep 30 2003, 03:36 PM
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#7
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Fear the Jack Stands Group: Members Posts: 1,493 Joined: 15-January 03 From: Sunny Tucson, AZ Member No.: 154 Region Association: None |
The only problem with using a silicone grease is the fact that silicone is known to degrade rubber. The newer seals may not be rubber, i don't know. They are hard to install without some kind of lube.
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| TheCabinetmaker |
Sep 30 2003, 03:43 PM
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#8
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
I just did this Saturday. I used clean engine oil. 65 miles so far. no leaks.
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| Queenie |
Sep 30 2003, 03:44 PM
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#9
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Society Is A Hole Group: Members Posts: 383 Joined: 14-July 03 From: SLO-CA Member No.: 908 |
QUOTE(need4speed @ Sep 30 2003, 01:10 PM) the local dune-buggy shop in town Just out of curiosity...what shop are you referring to? (I've lived in SLO county for thirty+ years.) |
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| Mueller |
Sep 30 2003, 03:47 PM
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#10
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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the perferred o-rings to use are Viton, which are not affected by silicone
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| Queenie |
Sep 30 2003, 04:00 PM
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#11
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Society Is A Hole Group: Members Posts: 383 Joined: 14-July 03 From: SLO-CA Member No.: 908 |
Just spoke to Pancho (onespeedboy) and what he has available are clean engine oil and teflon grease, so he'll make a decision from there.
He says "No wonder your engine was spewing oil: your old seals are COMPLETELY DEAD." You know, it never occurred to me that we might get the engine out and find that I needed something less heinous than valve guides...but it sure is looking like we're going to be able to track down the sources of the leaking & burning without having to go that far. In any case, our plan is to deal with all these peripherals (seals, harnesses, pcv valve), put the thing back together, and get it back on the road...and then wait to see what happens after that. I may still need the headwork after all, but I'm going to cross my fingers and wait to see. The good compression check that I got last year and the overall good running of the engine give me enough reason to hope for the best. |
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