So in all my dumbness i broke a piece of plastic off the top of my radiator so now u can see inside i've tryed using jbweld to get it to stay on there but no such luck it keeps coming off resulting in me not driving.

any suggestions on a product i should use to try to attach that piece again?? If not then i gotta get a new radiator and thats shippy

 

Sorry man, just crack this one up to the "live and learn" category and get another radiator. Any pics? How large is the damage? How'd it happen?

 

if the JB weld isn't holding it you're 1. not applying it right, or 2. not mixing it right. my buddy and i JB welded a BOV into the piping for the FMIC we put on his WRX until we could get a pipe with a flange--which was like a month! never had any problems with it.

 

It's plastic you should use fiberglass... Heres how to do it... Drain the radiator completely. I mean completely dry inside and out, around the broken area. Use a 120 grit sandpaper and sand the surrounding area(around 1 to 2 inches) to roughen it up so the resin sticks. It will not stick to a smooth service. Then mix your fiberglass resin correctly and apply a thin layer around the surrounding areas of the hole. try not to get any on the inside. Block the hole with a paper towel of you want to just don;t forget to remove it after you sand the area. Next, mix your resin and hardener according to the instructions and apply a thin layer to the area you sanded. Let it dry until it feels tacky not like honey but more like spray adhesive. Now get some fiberglass mat and pull it apart to the size you just applied the resin to. DO NOT cut the fiberglass mat. Pulling the mat apart helps it to adhere better to the surface. Now lightly press the mat to the area you applied the resin. Apply another layer of resin onto the mat and allow it to also become tacky. Press another piece of mat onto the surface and follow with another layer of resin to finish the job. Allow the patch to completely dry. I would leave it overnight to be safe. After it is dry you want to make sure the surface doesn't feel sticky. If it is sticky then you have mixed the resin incorrectly and i would recommend you redo the job. it should feel hard like the plastic on the radiator...

*Can anyone chime in on this to clarify if the fiberglass will hold up to the heat...*
i believe it will but just to be sure you should check the labeling.... good luck!

 

+1

 

yea the jb weld held but i keep getting a freakin pin hole and thats is a no can do. I was thinking about the fiberglass too so its funny u mention that but i just went ahead and went for the permanent fix and just ordered an aluminum radiator. and is it even possible for someone to use jb weld wrong its super easy mix equal parts, have the parts ur welding sanded rough, clean with a solvent and then apply jb weld and lightly clamp the parts together (i just taped firmly but not firm enough to push all the jb weld out.)

 

I've been laying fiberglass for...5years now i think, but i appreciate the write up and the idea

 

buy a new one.

 

I did https://www.evolutionm.net/forums/sh...d.php?t=319636