4.6L 4v Tech for the 4V Cobra motors and Mach 1

289 4v Intake Manifold Casting Repairs?

Old 04-15-2018, 09:12 AM
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RoddinRob's Avatar
Join Date: Dec 2017
Location: Sudbury
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289 4v Intake Manifold Casting Repairs?


I have a small leak at the thermostat, so I decided to replace the gasket. When I opened up the housing, I saw that the intake manifold mating surface for the stat has really bad erosion of the lower flange to the point where there is less than 1/8" of good 'flat' flange surface left. Not enough to get good seal. SO - the question is: Is there a way to repair the manifold with something like JBWeld, etc. or do I need to replace the manifold altogether?

Anyone else encounter something like this?


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Old 04-15-2018, 02:34 PM
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Location: Welland
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The cost of set up and remachining could be more than replacing it.
If you can't find one PM me, have a good one, clean painted and ready to go
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