Crank Case Epoxy

[jbooker82]

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.

[JTmachining]

Epoxy

[trickedcarbine]

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.

[rubberneck]

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

[hoppedupandcutdown]

JB Weld goes on liquid and smooth and shiny.

I've used it a lot, once on a a case.

Always lasts forever.

[jbooker82]

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.

[Whitbread]

Devcon type F. It's what honda uses to repair porous engine block castings at the factory instead of melting them back down.  

[registered user]

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

[jbooker82]

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.

[sleeper06]

I've ported quite a few ex engines, I use marine tek it holds up to the nitro pretty well