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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Crank seals and head gaskets
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[QUOTE="Ol'89r, post: 715446, member: 17212"] kawdude. That is exactly right. Only push against one side at a time. You can freeze the crank and heat the bearing to make it a little easier but, you have to be careful to have plenty of oil on the crank big end or the moisture from freezing could cause rust in the bearing. Most cranks only have a slight interference fit on the main bearing. Usually only a little amount of assembly lube or anti-seize compound is required for the bearing to slip down over the shaft. It is also a good idea to use heat when spliting your engine cases and removing the crank. Heating the case expands the aluminum and allows the main bearing to fall out of the case rather than be pushed out and take a little of the aluminum with it. Every time you push a bearing out and back in without expanding the case first, it wears the aluminum surface where the bearing goes in and eventually will cause the bearing to be loose in the case. [/QUOTE]
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Forums
MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Crank seals and head gaskets
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