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I have an 03 grizzly, what is the difference in the later water pumps? I ordered one not paying attn. awhile back and it says 04-08, but it bolts right up, should I be worried? im having problems btw.. dunno if head gasket or something else.. Itll run fine for a awhile but when I accelerate above .. say 30, it blows off the coolant bottle lid and white smokes, any help would be appreciated thx. I ran it for several days at low speeds.. even pulled a truck and nothing, but when I get up in MPH this happens, coolant in oil I suspect?
 

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There should be no difference in water pumps from 2002-2008 Grizzly 660's. The engines are identical to my knowledge.
But just look at any online parts diagrams and compare part numbers for different years. That will tell you.

It sounds like you have a blown head gasket though, not a failed water pump. But I have been wrong before.
 
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