 Pushrod seals, Silicon??? |
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| BenNC |
 Aug 14 2003, 04:23 PM
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#1
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Member  Group: Members Posts: 140 Joined: 7-February 03 From: Cary, NC Member No.: 267  |
When I replaced the o-rings on my pushrod tubes I noted that whoever had been in there previously had gooped the ends with silicon. The o-rings were pretty shot, so I thought that it was a cheap fix and got a chuckle out of it. Now I'm wondering if I should have added it.
Any thoughts? Thanks |
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| MarkV |
Aug 14 2003, 04:29 PM
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#2
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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 did the right thing. The seals are made to move w/ engine temperature. A light coat of grease is all that is required.
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| airsix |
Aug 14 2003, 04:34 PM
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#3
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I have bees in my epiglotis Group: Members Posts: 2,196 Joined: 7-February 03 From: Kennewick Man (E. WA State) Member No.: 266 |
Like Mark said. The new viton (sp?) seals are very good on their own. I did mine two years ago and of the 16 seals, only two seep just a tiny bit (probably my fault).
FYI - FAT Performance is notorious for caulking the crap out of them with RTV. -Ben M. |
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| Brad Roberts |
Aug 14 2003, 05:03 PM
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#4
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
I use a small brake cylinder hone and clean up the area that the seals sit into on the heads (if I see they are shiny from wear).. the area needs to be a little rough for a good seal.
NO SILICON. FAT does this on their upright fan shroud engines... because they cant get proper crank case ventilation (the fan housing sits on top of what used to be the breather box). B |
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| Bleyseng |
Aug 14 2003, 05:35 PM
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#5
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
I clean and touch up the sealing surface with #1 steel wool on a drill bit. It spins and cleans them up nice.
NO RTV or Silicon.... Have to try the brake hone sometime... Geoff |
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| mr914 |
Aug 21 2003, 10:24 AM
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#6
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914 Hillbilly Group: Members Posts: 576 Joined: 11-January 03 From: Lincoln NE Member No.: 131 Region Association: None |
I clean my mating surfaces with a white scotchbrite pad.
I then use Parker O-ring lube to install the seals. I built a tool for installation a few yearrs ago that makes it much easier. |
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| tat2dphreak |
Aug 21 2003, 02:10 PM
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#7
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stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region  |
ok, he did the right thing... but I think I screwed up... I saw that RTV had been used and went back with it along with the new O-Rings? do I need to pull everything apart again and remove the RTV?
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| Bleyseng |
Aug 21 2003, 02:14 PM
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#8
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Hopefully no RTV has entered the engine where it blocks small oil passeges, ie the mains or cam bearings.
Keep that crap away from your engine! Works great on sealing a water pumper but there is no water in a 914 motor! Geoff |
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| tat2dphreak |
Aug 21 2003, 02:38 PM
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#9
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stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region |
I was careful about that when reassembling it... but should I go back in and get it out before it does any harm? (IMG:style_emoticons/default/sad.gif)
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| mr914 |
Aug 27 2003, 09:58 AM
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#10
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914 Hillbilly Group: Members Posts: 576 Joined: 11-January 03 From: Lincoln NE Member No.: 131 Region Association: None |
I'd wait till it starts leaking in about 1000 miles.
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