(318-360 Cu - In Engine)

Chrysler used only two styles of gasket for the 318 - 360, # 826 manifold. One blocks all water from passing through it. This gasket is used to separate raw water and anti-freeze as well as to allow water to flow out of the manifold from a fitting rather than through the gasket. The other gasket has a 3/4” hole at the top to allow the raw water to flow out through the gasket to the riser or elbow and go overboard. This gasket is used most commonly, and is the gasket used at the fixed riser and elbow (see page 23). Many installers look at the mating surface of the manifold, elbow and riser and see the water passages in the parts. They incorrectly assume they got the wrong gasket and alter it to look like the gasket surface. There is only one 3/4” hole at the top of the Chrysler exhaust manifold to allow water to flow. The rest of the gasket is blocked intentionally. This is correct. Do not modify the gasket. The one hole in the top of the gasket is designed to allow the manifold to fill and remain full of water. By cutting the gasket the manifold will not cool properly.

Tech Tips for Swivel Exhaust

OSCO has improved the clamp used on the Chrysler swivel elbow and riser from the stamped style on the right, to the cone shaped on the left. The cone may or may not touch on the lower elbow, and may remain tilted as shown. The object is to pull the riser down on the O-rings to seal. Install the O-rings with petroleum jelly, which will help avoid damaging the O-rings if the parts are moved during assembly. The bolts and clamps only need to be snug, Do not over-tighten. Do not use silicone or sealers on the O-rings. Remove paint from sealing surfaces using acetone or lacquer thinner prior to installation. Tech Tip applies to: 5639-CL, 7087-MK, 4-EXT-12 and 1812-8 are parts or kits which include the above clamps. 9234, 0402, 5639 and 4-EXT are parts which require these clamps for installation.