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?