Two Stroke Motocross

Two Stroke Motocross Forum => Technical => Topic started by: opfermanmotors on March 04, 2011, 11:57:12 AM

Title: Leaking Watercooled Heads
Post by: opfermanmotors on March 04, 2011, 11:57:12 AM

The old style watercooling heads had some paper mache around crush metal.  Unfortunately, these are prone to leak if they cannot be fitted perfectly as heads do warp.  I may go and shave the head, had to do that with my Cr500, but what are some tried and true other methods of creating a seal?  I know some have used types of sealent, I tried Honda Bond HT unsuccessfully though, still leaked.  I have heard of silver spraypaint on the head gasket as well to create a bond. 

Title: Re: Leaking Watercooled Heads
Post by: Charles Owens on March 04, 2011, 12:12:10 PM

You need some Copper Coat. Get it at advance auto or anywhere like that.
It's made for your problem. :)

Title: Re: Leaking Watercooled Heads
Post by: opfermanmotors on March 04, 2011, 12:15:16 PM

Awesome, will give that a try. Need to get a new head gasket now  :)

Title: Re: Leaking Watercooled Heads
Post by: Charles Owens on March 04, 2011, 12:16:19 PM

It's good stuff. It comes out like a thick spray paint, seals well :)

Title: Re: Leaking Watercooled Heads
Post by: juliend on March 06, 2011, 06:47:30 AM

Yep, Copper Coat. I keep a can on hand. Works great for those crush gaskets like you are talking about.