[Need advice....Keep blowing head gaskets.] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

Pages:1

Need advice....Keep blowing head gaskets.
(Click here to view the original thread with full colors/images)

Posted by: z400m1x34

I have an 04 yfz 450. With wiseco 13:5-1 high compression piston, with hot cams... this is the third time blowing a head gasket. i have used stock yamaha, and some kind of off brad gasket, dont know the name..any advie on why i keep blowing them, reson i know is because antifreeeze keeps gettin in my cylinder..??

Posted by: bradley300

try putting some 1104 hi temp gasket maker on either side of the head gasket before putting the new one on

Posted by: z400m1x34

You think that would do it...? Its not the valve cover gasket its the gasket between the head and cylinder..Is there any type of special high comp. gaksets out there?

Posted by: bradley300

it's more of a band aide than a fix, but it seems to do OK, ive done it on my hi-comp blaster. not b/c of issues, but more as extra insurance, and it seemed to work. any hi-temp silicone should work

Posted by: daddio

Is the surface of your head and cyl. perfectly flat? Have you ever overheated the motor?

Posted by: z400m1x34

yeah it is all new...all replaced..its flat..

Posted by: daddio

The next time you put it together, do a "leak down test" on it, and that will tell you if and where you have a problem. Bad seal, cracked head or cyl etc.
I've used cometic and Yamaha gaskets (without any special sealer), and the only time I blew a head gasket was when I shortcutted the Factory Yamaha method of torquing the head down. Now I do it exactly like the book says.