Jeep Engine >> EXHAUST MANIFOLD LEAKS

Jeep Engine >> EXHAUST MANIFOLD LEAKS

Exhaust Manifold Leaks On
Chrysler/Jeep 4.0L Engines


Chrysler Corporation has revised the exhaust manifold gasket and exhaust manifold installation procedure on 4.0L engines used in Jeep Cherokee, Wagoner and Comanche Trucks. The gasket and installation procedure should guard against exhaust manifold leaks on these vehicles.

The revised combination exhaust/intake manifold gasket carries Part #53006244 and should be installed with the following procedure:

Remove any remaining gasket material from the mating
surfaces of the cylinder head or manifolds.

Since the two manifolds are to be mounted as a unit, loosen
the EGR crossover tube that connects the two of them.

Place the new gasket over the alignment dowels of the
cylinder head and mount the manifold.

Install all fasteners finger tight.

Using the torque sequence outlined in the illustration,
torque fasteners #1 through #5 to 23 lbs.ft.

Torque fasteners #6 and #7 to 17 lbs.ft.

Torque fasteners #8 through #11 to 23 lbs.ft.

Tighten the EGR crossover tube nuts to 30 lbs.ft. of torque.

Advise the mechanic who will install the engine, to loosen
the clamp that fastens the exhaust header pipe to the
manifold, if the vehicle is so equipped, before mounting the
pipe to the manifold. This prevents stress in the manifold
itself. The clamp may be tightened after the pipe has been
secured to the manifold.

This procedure is different from the one outlined in most service manuals, but should yield better results in preventing exhaust manifold leaks.


The AERA Technical Committee

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