Question about 2003 Yamaha YZ 250
I am not sure what you mean by impeller seal so here are a few scenarios:
**Note: Based on YZ250. others may be similar.
-If the gasket around the impeller housing is leaking you can replace that on its own. Open rad cap, drain the coolant using the lower screw with the copper washer behind it. Then remove the other 3 bolts, remove cover, clean mating surface, install new gasket, snug everything up, and replace the coolant.
You don't need to replace the head gaskets unless your leaking from there, or getting coolant in the engine.
The same would apply to your base gasket.
just in case:
-if your transmission/gear oil is milky, your will have to change the oil seals on the impeller shaft.
Posted on Jul 31, 2009
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Posted on Jan 02, 2017
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