Re: 1954 packard pacific / GM 700-R4 transmission lens / radiator cap / pin hole leak

Posted by HH56 On 2020/6/22 22:08:49

I have never tried it for that purpose but JB Weldhttps://www.jbweld.com/products has a decent reputation for other repairs and a couple of their products might work providing you can get the surfaces completely clean of paint and grease for a good bond.

The regular epoxy is liquid and might flow enough to get down in a crack or hole from the outside to bond with both surfaces. There is also another of their products called Waterweld which is in putty form and designed for use in wet environments. It might also work but being putty you would need to work and force the material down into the crack thoroughly. If the area is accessible from the filler opening than possibly a bit could be added from both sides although I don't know how well it would stick inside the radiator if there is oil present.

The regular epoxy has a higher temp rating but either should be able to handle a radiator temp. No idea how long or if they would hold so it may still come down to removing the radiator and taking it to a shop.