Reviving an old thread here. I had my coolant pipes welded up but Im having an issue w tiny leaks when the car is up to temp. There is zero coolant leaking or coolant system pressure drop when cold.
Im thinking of prepping the welds really well and JB welding the welds once over to catch any pinholes. This seems to have worked in the past for some and EVOMS uses it to repair aluminum that is leaking coolant.
Question...can anyone recommend a better two part epoxy similar to JB Weld that is better than JB or should I just stick w it. I hear 3M makes some good stuff but I am unfamiliar. Thanks all.

You can see where EVOMS used JB Weld (or equivalent) to make a repair and it seems to be holding coolant better than the actuall welds. Who would yhave thought!

 

I could be wrong, but I dont think there is anything better than JB weld for this application. I did a lot of research before I used it. I can tell you there was nothing better 3 years ago. Just make sure surface is rough and very clean, free from oils, etc. tap on the area that EVOMS covered with JB weld, I swear it seems to be harder than aluminum. I am a true believer in JB weld now. I was initially scared, but rested easy when I put it into perspective, its 1000 times than the junk that Porsche squirted on the nipples to hold them in.

I think a lot more people use JB weld for repairs than like to admit and i completely understand why, in theory it seems like the wrong fix and somewhat embarrassing (wait, you are going to use glue to fix my car?!? ) But JB Weld is the real deal, often stronger that the original part. No, I dont have stock in JB weld.

 

Thanks for the heads up. Im going to tackle the job tomorrow. I will be brushing the area down w a wire brush then clean up with acetone and then spread it on. Ill post pics.

 

After wire brush, before acetone, use some 150 grit sandpaper and rough as much up as possible.

looking forward to pics.

 

maybe putting jBweld on top like that after the weld could be a good inssurrance, i think it's a good idea. I'd be a little worried to only put JBweld but as a safety, it might do it.