I am looking the use JB WELD to build up spacers for the inside four bolts of my intake. I am using an a 1989 TPI intake, on a 86 block. I have already ovalled out the holes to work, and plan to be liberal witht the RTV. Here's the plan.
I am thinking of installing the 4 bolts until the inside edge of the bolt touches the manifold. Then I will back out 1 turn. Stuff a bunch of jb weld in the gap, and let set up.
Now i know i will use little pieces of paper, so as the weld doesn't touch the intake or bolt.
After is sets up i should be able to torque down, with a home spun spacer.........
What do ya think???
shawn

 

The JB Weld will crack when you torque the manifold. Here is another idea. Coat the bolts with vasoline (not too much just make em slick) also put a little on the heads where the hogged out holes are. Put the manifold in place and put the bolts in their holes. fill around the bolts with your JB Weld until level with the manifold, let sit 24 hrs. Remove the bolts and manifold and check the under side to make sure it is level and check the top of the JB weld for level too. Get some alumnium stock rod the diameter of the bolt heads and cut out some thick "washers" from it and drill the center for the bolts. Usig a file (Vixen file would be best) file the angle you need for them to sit flat on the manifold with the bolt through them. Viola, filled holes and "proper" beveled washers for the bolts.

 

like Morley said.. JB weld will crack.


a easy solution is also like the 2nd half of what he said.. make your own spacer...


i used a soild square alum bar last time i made them... drill your hole, stick it on the manifold and get a idea of what you have to take off....

alum is nice and soft.. easy to cut..
cut it close, file it until it fits perfect.....

be sure to use a washer on top so that you dont gall the alum when you tighten the bolt.