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Depending on the motor you may need to put a small dot of silicone at the corners where the intake meets the head of a V motor. 4-6 cylindar straight motors don't use sealer.

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Q: Should gasket sealer be used on the intake manifold?
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Related questions

Is there a sealer to stop a leaking intake manifold gasket?

no, but you can replace the gasket entirely add the sealant ensuring a leak free fit.


Can you use a sealer to fix the intake gasket leak?

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Can an intake manifold gasket with a small tear in a narrow section be repaired with scotch tape?

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The thermostat goes in the recess of the manifold . The gasket should be glued to the thermostat housing. Silicone sealer makes a metal surface slippery, so if used, should be done sparingly. Let the two adhere and install the housing to the intake. Do not over tighten as a bolt could possibily break. BE SURE THE SURFACE IS CLEAN of the old gasket.


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The removal and reinstallation of an intake manifold on this FWD transverse application is of Êhigh difficulty. The first steps are disconnecting wiring harnesses, and brackets obstructing the manifold bolts. Once the manifold bolts are off, the factory gaskets should be removed and surfaces cleaned off. The manifold can be run through a parts cleaner to dissolve carbon deposits. The new gasket and sealer as needed should be applied. The manifold can be replaced and re-torqued. The final steps are reconnecting wiring harnesses, restarting and checking for leaks.


What would causes an oil leak at the gasket for the distributor after replaceing head and intake gaskets did not have this problem before?

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What could be leaking coolant between the valve cover and intake manifold on the left front since it sits sideways side of 2001 Pontiac grand prix supercharged 3.8 L engine?

Some bolts pass thru the water jacket so if you don't put sealer on the bolts the coolant can climb up the threads and puddle on the intake. I have removed them one at a time , cleaned the threads and reinstalled them with sealer and this fixed the problem. The dissimilar metals of the aluminum intake manifold and cast iron block have different expansion rates and eventually the lower intake manifold gasket will fail. All the bolts are not accessable without removing the supercharger. These bolts have a specific torque value and tightening sequence. Do the job right and remove the supercharger and intake manifold. Replace the gasket and reinstall the intake manifold using a thread sealer. Torque the bolts to 11 foot pounds and in the proper sequence. Coolant can leak internally into the engine, treat the problem not just the symptom. Hope this helps. "G"


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