I recently had to replace my intake manifold gaskets because of coolant leakage. When I had the lower intake manifold off the engine, I inspected it vigorously for cracks and I found none. But after putting everything back together and putting the bolts to torque, I noticed a crack beside the bolt behind the alternator. I was just wondering what I could do to possibly repair this crack. Even if it's only temporary. I was going to use JB weld but their site says not to use it on manifolds because the manifold could get higher than 500 degrees. Anyone used JB weld on an intake before with no problems? Is there anything else I can use to fix the crack? I don't want to braze it because of the possibility of warpage from the soft aluminum.
2007-05-12 02:13:02 · 7 answers · asked by boredpenguin2 2 in Cars & Transportation ➔ Maintenance & Repairs
If your intake manifold is getting over 500 degrees, you have other problems. The right thing to do is have it welded by a good repair shop with a TIG welder. I would try the JB weld and see how it works. I've used it in unusual situations and it holds up very well. If the crack isn't very big, it should work.
2007-05-12 02:20:34 · answer #1 · answered by Nc Jay 5 · 1⤊ 0⤋
I saw a neet trick on one of those auto shows where they had a product that reformed the broken end, they drilled a hole in it and it tested stronger than the original, sorry I can't remember the name of the stuff. It might be cheaper to replace it with a used one though. When putting one on if it calls for 35 lb. of torque and is new go for it. If it is a used manifold use a bit less torque. The one you replaced the gasket under probably wasn't cracked until you torqued it back on too tight.
2007-05-12 02:25:34 · answer #2 · answered by samhillesq 5 · 1⤊ 0⤋
Give it a shot. You won't hurt it or anything if it's all ready cracked.
I don't know how well it will hold up with constant heating and cooling though.
Be prepared to replace it soon. It will probably not seal very well against the head anyway without the proper torque at all the bolt holes.
And next time, follow the proper "sequence" when tightening the new one down.
2007-05-12 02:55:43 · answer #3 · answered by Mr. KnowItAll 7 · 1⤊ 0⤋
grind or file asmall relief in the crack then fill it with the jb weld. it will hold for a while unless the crack is leaking from the bottom side were you can,t get to it to seal it. the heat warning on manifolds is for the exhaust.
2007-05-12 02:26:18 · answer #4 · answered by tott1 5 · 0⤊ 0⤋
A blown intake gasket on the 3.1 engine can leak coolant on the inside of the engine or the outside.You should take you malibu to your local chevrolet dealer to have the gasket checked.If bad they will give the best repair with no problems later.And a good warrainty for the repair.
2016-04-01 07:57:03 · answer #5 · answered by Anonymous · 0⤊ 0⤋
You don't braze it. Aluminum can be welded. Just about any machine shop should be able to do this.
2007-05-12 02:18:24 · answer #6 · answered by Anonymous · 0⤊ 0⤋
your intake should NEVER get over 500* lol jbweld will work dude dont worry
2007-05-12 02:17:36 · answer #7 · answered by Anonymous · 0⤊ 0⤋