jbooker82 Posted October 3, 2016 Report Share Posted October 3, 2016 What do most builders use when they epoxy crank cases? I have an RC car motor / piston port cylinder that I need to fill the intake port in. I am using it on a reed crank case so they normally fill the intake port. The the one I have looks like it was filled with a grey liquid because it was smooth on the surface. It didn't look like it was packed with a putty. Quote Link to comment Share on other sites More sharing options...
JTmachining Posted October 3, 2016 Report Share Posted October 3, 2016 Epoxy Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted October 3, 2016 Report Share Posted October 3, 2016 Epoxy should go smooth like you are describing. Devcon ain't shabby stuff. I know a lot of fellas running Moroso, but I don't have personal experience with the Moroso to say how well it held up. Quote Link to comment Share on other sites More sharing options...
rubberneck Posted October 3, 2016 Report Share Posted October 3, 2016 i used moroso A+B to repair a damaged case from a rod letting go. Its been in there at least 5 years now with no worries http://www.jegs.com/p/Moroso/Moroso-A-B-Epoxy/747661/10002/-1 Quote Link to comment Share on other sites More sharing options...
hoppedupandcutdown Posted October 3, 2016 Report Share Posted October 3, 2016 JB Weld goes on liquid and smooth and shiny. I've used it a lot, once on a a case. Always lasts forever. 1 Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted October 3, 2016 Author Report Share Posted October 3, 2016 That's what I was wondering I have used JB Weld before and its thin enough to flow. I just didn't know if I needed to look for something that is a specialty for fuel resistance or if pretty much all epoxies are fuel resistant. Quote Link to comment Share on other sites More sharing options...
Whitbread Posted October 4, 2016 Report Share Posted October 4, 2016 Devcon type F. It's what honda uses to repair porous engine block castings at the factory instead of melting them back down. Quote Link to comment Share on other sites More sharing options...
registered user Posted October 11, 2016 Report Share Posted October 11, 2016 devcon is expensive just to use a small amount and if the remainder isn't stored correctly it goes to shit. seems like shelf life is only 1 or 2yrs in factory sealed container so you can imagine after its been opened Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted October 13, 2016 Author Report Share Posted October 13, 2016 Yea I ended up using JB weld. Id imagine when guys who do reed case rc engines they use Devcon F and do a bunch of cylinders at a time. The 1lb kit was 50-60 bucks and the cylinder was only $100. I ended up using only about a 1/4 tube of the jb weld. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted October 13, 2016 Report Share Posted October 13, 2016 I've ported quite a few ex engines, I use marine tek it holds up to the nitro pretty well Quote Link to comment Share on other sites More sharing options...
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