greg g Posted September 26, 2007 Report Share Posted September 26, 2007 I don't want to pull my intake off but I do want to address the leaks that were discovered. I bought some JB WELD clone that is like modeling clay you can cut it knead it and role it out like clay than form it to the application. I am contemplating putting the snake around the flanges and working it in to see if it will block the air leaks. I guess if it works, but if it doesn't it might be a bear to remove. says it has a five minute working time sets in 15 minutes and cures in an hour, chemically resistant good to 300 degrees. I know I should do it right but am being seduced by the ease of the quick fix. (hopefully) Quote Link to comment Share on other sites More sharing options...
RobertKB Posted September 26, 2007 Report Share Posted September 26, 2007 Greg, easy seduction often leads to undesired results. Pulling the manifolds is not that time consuming and you should have no trouble with hard to undo bolts and nuts as your rebuild is fresh. Do it once, do it right. Quote Link to comment Share on other sites More sharing options...
rearview Posted September 26, 2007 Report Share Posted September 26, 2007 Greg... I was afraid to pull my manifolds, but it was pretty quick and easy. The JB will just waste your time and maybe cause more problems in the long run Quote Link to comment Share on other sites More sharing options...
Normspeed Posted September 26, 2007 Report Share Posted September 26, 2007 I do love my JB Weld, but I think I'd pull the manifold and put in new gaskets. For one thing, it may be hard to really get the epoxy all the way around each flange with the manifold installed. And later when you want to do it right, the remains of the epoxy might be difficult to get off. Quote Link to comment Share on other sites More sharing options...
bob_amos Posted September 26, 2007 Report Share Posted September 26, 2007 Greg, Step up and pull the manifold. Yu will NEVER be happy with a "Mickey Mouse" job. It'll haunt you and you will never be happy with it. Winter's coming and you will need something to do on those cold days... Quote Link to comment Share on other sites More sharing options...
claybill Posted September 26, 2007 Report Share Posted September 26, 2007 jb is jb...clones dont cut it. especially that modeling stuff. if it is a gasket...it wont work. if there is a pinhole or crack or somethng in the metal jb will fix it. bill Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted September 26, 2007 Report Share Posted September 26, 2007 Greg; What happens when this stuff starts flaking off. Think your valves and pistons can chew it up? Quote Link to comment Share on other sites More sharing options...
greg g Posted September 26, 2007 Author Report Share Posted September 26, 2007 Well upon further consideration, I am going to try the same thing temporarily with plumbers putty, as it will likely stop the air infiltrationand be easily removed, I don't think there is any way for it to actually get into the manifold. I just do not want to struggle with that one famous nut up and under the center branch yet....... Quote Link to comment Share on other sites More sharing options...
Lou Earle Posted September 26, 2007 Report Share Posted September 26, 2007 What is the problem? where is the leak? that can determine if JB will do the job and by the way sounds like you have the fast activating kind. Regular JB is slower and does not really cure fro 24 hours. My view is entirely different. I assume the leak is from a crack in the manifold. I if that is true I would definitely try the JB route. I fixed -and I mean fixed a cracked intake manifold and a split carb gas inlet with JB weld in 1966 and when I got the 31 A model back in 1991 that repair - fix was still intact and A model truck ran for me that way for about 3 more years until I got mew manifold and carb _ I still have the carb and it still works. So my view is - Try it if it fails so what? I do not think you can put enough on the crack to get into the engine - if that is possible then the crack is way to big to be repaired. JB weld is good stuff if properly used - I have also v grooved an external 3 inch crack crack in the water jacket of an a model engine with the JB weld to it and then some dirt while still tacky then painted and you still cannot see the repair. Have had that engine running in friends car over 20 years. So just my 3 cents worth Lou Quote Link to comment Share on other sites More sharing options...
Guest 57plymouth Posted September 26, 2007 Report Share Posted September 26, 2007 Is it a leaking gasket or a flaw in the casting? I would be loathe to use JB to fix a leak. If my car was as nice as yours, I would replace the offending gasket or weld the flaw up. If you have a warped flange that won't seal right you can use Permatex Ultra Copper RTV to make the gasket seal. It works a charm on my exhaust pipe flange. Quote Link to comment Share on other sites More sharing options...
Guest jjmorrse Posted September 27, 2007 Report Share Posted September 27, 2007 My uncle fixed a block cack in his 50 gmc with the jb. I did not believe it until he showed me. Quote Link to comment Share on other sites More sharing options...
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