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Assuming it's a V-8, either a small block or big block, how to fix it depends on whether it's a vacuum leak or an oil leak.
A vacuum leak would be from the gaskets between the manifold and the head. Just scrape clean and install new gaskets. No goop, gasket seal or RTV Silicone, install it dry.
The most likely leak would be an oil leak and would be from either the front or rear rubber gasket between then intake manifold and the top of the lifter galley of the engine block. (probably the rear, too!)
These can be a real problem for someone who doesn't know the 'secret'. GM has replaced these seals with RTV Silicone in a successful attempt to stop the problem. It's possible the 95 is RTV Silicone only, can't remember. I'll give both options.
If there is a rubber seal, DO NOT put any RTV Silicone, or anything else on them. Make sure the manifold and block are clean and free of oil. Then correctly tighten the manifold, in order and to correct torque. The pressure and the temp after the engine heats up will 'bond' the seal in place. Most anything you put on it will act as a lube and the seal will ooze out as you tighten the manifold.
If the 95 has no seal and only uses RTV Silicone, make sure all surfaces are very clean and then use the High Temp Red RTV Silicone, at least, don't use the blue.
Good luck
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∙ 15y ago
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