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It would be best if you got the Chilton's manual for your car. This is a fairly complicated task on the 3.1. Not at all impossible, but you have to mess with a lot of things. You'll need to take off the throttle body. Remove the alternator and power steering pump, unbolt the upper plenum. Remove the fuel lines, fuel rail and injectors. Remove valve covers and loosen rocker arms. The push rods go through the gasket and will need to be removed to R & R the lower intake gasket. Keep the push rods in order as they are different lengths for intake and exhaust. Remove lower intake manifold bolts. Reverse the procedure to install.

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Q: How do you change intake manifold gasket on a 1998 Pontiac grand prix with a 3.1 engine?
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