Need advice....Keep blowing head gaskets.

[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..??

[bradley300]

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

[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?

[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

[daddio]

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

[z400m1x34]

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

[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.