metal filled epoxies...

[jerrym]

what do you guys prefer? I am looking to fill/reshape the intake ports of an engine head and was wondering what's out there besides JB weld. I've done a lot of searching but have yet to some up with much that is as heat resistant as JB weld and as strong.

[hankj]

I wiuldn't trust any of them to hold up in a head intake port. I'd rather weld it up and machine it.

Just my 2¢.

Hank

[jerrym]

your 2cents is always appreciated

[Thomas Harris]

jb weld regular is only rated for 500*F, The quick set is only rated for 300*F. That seems pretty low for anything but something in constant fluid contact. Such as oil, coolant , etc. It's dang handy stuff though.

[MXtras]

Well - I used Marinetex to reshape an intake port on a 125CC two stroke in my younger years. It held up very well. This was on a watercooled motor, by the way.

Scott

[Brianstick]

I used JB weld to repair a hole in a motorcycle gas tank. It held up fine for nine years until I finally pulled it off the road because of engine problems.

[cncworks]

http://www.devcon.com/devconcatsolution.cfm?catid=34

[jerrym]

yeah devcon was one of the first places I checked out but if you notice that while their epoxies are stronger than JB weld they are less heat resistant.

I found this stuff called Lab-metal:
http://www.alvinproducts.com/

Supposedly it resists temps of up to 1000 degrees but it doesn't appear to be very strong since it says that it cannot bind two objects together so it must not have very high tensile strength.