Crankshaft filling

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Old 03-02-2010, 11:34 AM
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Default Crankshaft filling

Does anybody knows what can I use for crankshaft filling?something should be between engine sealer and epoxy,but what exactly?
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Old 03-02-2010, 01:02 PM
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Originally Posted by gabor szilagyi View Post
Does anybody knows what can I use for crankshaft filling?something should be between engine sealer and epoxy,but what exactly?
I used red hi-temp rtv silicone . put a little amount in the crank and cut a piece of lexan the same width as the crank opening and round it at one end to smooth/ramp the silicone, mine came out really nice and is holding up......
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Old 03-02-2010, 02:03 PM
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I been moding some of my motors for a while now and have had Great luck using good qauilty high temp red RTV silicone. Take ur time use somthing small an flat to help make it real Smooth. I also sand the inside of the crank with 1000 grit sandpaper and then clean with brake cleaner let dry and then apply. Speedrob
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Old 03-02-2010, 02:38 PM
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Thanks for the respond!
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Old 03-02-2010, 02:51 PM
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Permatex has Nothing in their lineup that is Rated for Nitro Methanol.

1 product i use and Know works like a charm is Three Bond 1211.
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Old 03-02-2010, 02:58 PM
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May not be rated for it but no problems using it. What is that three bond 1211 away down to try something different? Thanks speedyrob
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Old 03-02-2010, 03:03 PM
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Originally Posted by Speedyrob View Post
May not be rated for it but no problems using it. What is that three bond 1211 away down to try something different? Thanks speedyrob

come again ?
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Old 03-02-2010, 03:05 PM
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+1 for three bond 1211, that's what i use to fill all my crank, and to seal all my nitro engines.
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Old 03-02-2010, 03:08 PM
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whats this 3 bond 1211 stuff never heard of it
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Old 03-02-2010, 03:08 PM
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What is three bond 1211??? Always down to try somthing different sorry for my fast typing. Where can i buy it at same place auto zone Etc. Thanks speedy
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Old 03-02-2010, 04:41 PM
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http://www.reidrc.com/news.htm
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Old 03-02-2010, 05:08 PM
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I dont see how that GE silicone in the link above can come close to the proper crank fill? The reason it is so expensive and hard to find is because it will resist expansion or contracting up to like 500 degrees. Also it is chemical resistant both synthetic and petrolium based fuel and oils. Thats what happend with the trinity engines that had so many crank plugs coming out and ruining engines or causing problems. The fill they used was not up to par. The chemicals in some fuel and after run oils compromised the integrity after a short time.

I myself used to run trinity engines and I bought a tube of the stuff from japan that is $80 a tube. because I had a few crank plugs come loose. The proper stuff will last past the life of the engine.

I would just hate to use cheap stuff and have a plug come out and jam between moving parts in an engine full throttle on a straight and ruin it. I mwan, I am sure a lot of stuff will work for a short time, but eventually maybe a gallon maybe 3 it will end up coming loose, at least from my experience......
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Old 03-02-2010, 05:53 PM
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not hard to find at all actually, been using it for a few years now.

http://www1.mscdirect.com/CGI/GSDRVS...00000129140355
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Old 03-02-2010, 05:55 PM
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Originally Posted by wfo View Post
I used red hi-temp rtv silicone . put a little amount in the crank and cut a piece of lexan the same width as the crank opening and round it at one end to smooth/ramp the silicone, mine came out really nice and is holding up......
Holding up for how long?
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Old 03-02-2010, 06:47 PM
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I use the Threebond 1211, works great, it is white.

Rex

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