Author Topic: O-rings on COOL HEAD (by Pro Design)  (Read 500 times)

Offline Froggie250FR

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O-rings on COOL HEAD (by Pro Design)
« on: May 15, 2018, 10:42:16 am »
Hello everybody!
I close my top end of my new machine never used yet... A project abandoned by another guy around here...

I have a cool-head in a Ziploc bag with o-rings but I feel like it's missing a groove. Should it be milled?  Is it an unachievable plan?  Is it an oversight by the manufacturer?  Should I be ashamed of my question?  :D

Thank you!!
I'm not weak-minded...  I'm only french...

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Offline Greazee

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Re: O-rings on COOL HEAD (by Pro Design)
« Reply #1 on: May 17, 2018, 06:13:30 am »
They were designed to be used with an oem or equivalent head gasket.... Some folks ( including myself ) will cut grooves for o-rings in the head or cylinder to eliminate the gasket. There is some controversy over cooling issues when doing this, since the restriction
( redirection ) from the smaller orifices of the head gasket are no longer used. ( there is mods to combat this however! )


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