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Old 11-09-2017, 10:44 AM   #3
Sid
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Join Date: May 2010
Location: Rathdrum Idaho
Posts: 737
Default Re: rear main seal replacement

Getting the old rope out is the biggest problem. It helps slightly by loosening all the main caps. As you may already know there is now a 2 piece neoprene type seal.Only use the one made by Best gasket co. Other brands don't seem to hold up well. When you install this seal slightly "clock" the upper half so the one side of the seal is above the edge of the block by 1/4 inch or so. Do the same with the lower half to match. This puts mating surface of seal away from the block mating surface. Be sure to put a small dab of silicone on the lower half of the seal retainer before installing.You may also a very small amount of silicone in the grooves for the side rails also. Leave the bolts slightly loose,then put a dab of silicone in the side rails,install side rails,then the little metal pieces then finish tightening your seal retainer. That little metal nail piece goes between the block and side seal. I also prefer Permatex "Right Stull" for this but the red silicone works well if you prefer. Your new seal should have a small "shoe horn" with it to assist getting the upper half started around the crank. Eaton Balancing in Texas Or John Mummert in Calif. are good sources for the seal.
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