The best way to repair that known and common defect is to replace the thin steel pan with a billet aluminum piece and a quality gasket or welded to the upper manifold. Replacing this gasket per the factory service manifold is a very temporary fix and WILL fail again. Check DodgeTrucks.org for additional info, photos, and how tos.
The intake gasket is the gasket that conncects from your air filter into your intake manifold
jaguar 2001 Lower Engine Intake Manifold Gasket
Assuming this is a 4.3L engine, the upper intake manifold gasket would be between the upper intake manifold and the lower intake manifold.
What engine? and ensure it is a bad gasket, not an intake plentum.
Simple method... get some carb cleaner or starting fluid. With the engine running, spray the area where the intake manifold gasket is. If you experience sudden bursts of increased RPMs, you have an intake manifold gasket issue.
Yes, you must install a new intake manifold gasket.
An intake manifold gasket is a malleable material that is set between the air intake manifold, the cylinder heads and the block in a gasoline powered internal combustion engine. Intake manifold gaskets prevent leakage of air or the air-fuel mixture by sealing the gap between these various metal engine parts.
It is the sealing part that seals the intake manifold to the cylinder heads and to the top of the engine block. The intake manifold is the part that distributes the air to the cylinders. It also can house the thermostat, the injectors, the throttle plate. An intake gasket could leak coolant, engine oil, or engine vaccuum.
Between the intake manifold and the cylinder head.
between the head and intake manifold
Yes. If an intake manifold gasket was not installed properly or has somehow become damaged the engine will pull air through the opening.
directly under the intake manifold