Jeep 5037510AJ Intake Manifold

After removing the lower intake manifold, clean and inspect the sealing surfaces and gaskets, replacing them if needed.

Tighten the bolts in several steps to the specified torque, and complete the installation in reverse order of removal.

Disconnect the electrical connectors from the MAP sensor and the throttle body.

Next, remove the heater hoses and coolant hoses, loosen the remaining manifold mounting bolts/nuts in 1/4-turn increments until they can be removed by hand, and be cautious not to pry between the manifold and the heads to avoid damaging the gasket sealing surfaces.

The first step is to relieve the fuel system pressure.

Remove the fuel rails and injectors.

To remove the lower intake manifold, drain the cooling system and remove the upper intake manifold. Label and detach any remaining hoses and remove the fuel rail and injectors. Remove the heater hoses and coolant hoses. Loosen the remaining manifold mounting bolts/nuts and carefully break the gasket seal. Turn the manifold over, replace the O-ring on the heater supply tube, and remove all traces of old gasket material and sealant. Clean the mating surfaces with lacquer thinner or acetone. Apply RTV sealant around the front and rear cylinder head water passages and lay the new gaskets in place. Position the manifold on the engine, aligning the gaskets and manifold with the ports in the cylinder heads. Install the fuel rail and injectors, then tighten the nuts/bolts. Refill the cooling system, run the engine, and check for leaks.

Ensure the mating surfaces of the cylinder heads and intake manifold are perfectly clean.