Sealing the Thermostat housing

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kampinguru
Posts: 84
Joined: Mon Dec 07, 2015 10:15 am
Location: Milton, Ontario

Sealing the Thermostat housing

#1 Post by kampinguru » Mon Apr 10, 2017 9:15 am

Good morning
The parts fiche shows no gasket between the cylinder head and the thermostat housing. Mine is leaking when I filled it with antifreeze. The manual does not show using any kind of sealant on the connection but I do not see how two pieces of metal will seal themselves. Am I missing something here? Should I be using permtex to seal the surfaces? Thanks

tacky1
Posts: 950
Joined: Wed May 13, 2015 1:11 am
Location: Pacifica,,

Re: Sealing the Thermostat housing

#2 Post by tacky1 » Mon Apr 10, 2017 10:40 am

The seal is a rubber gasket that surrounds the thermostat, The thermostst fits into the seal and that gets compressed when you tighten it all up.

This is the complete stat with seal http://www.ebay.com/itm/Yamaha-RZ500-Ma ... bh&vxp=mtr" onclick="window.open(this.href);return false;
1985 RZv500
1984 RZ500 Hybrid
1986 RG500 Walter Wolf
1986 RG500 Skoal Bandit
1984 RZ350
1984 RZ350 Hybrid
1981 RD350LC
1981 RD350LC Hybrid
2009 CR500AF Supermoto 250X
2007 CR500AF 250X
1988 YSR50 (2)
1984 GPZ750 Turbo
1989 VFR750R RC30

justind97
Posts: 202
Joined: Mon Aug 10, 2015 8:57 pm
Location: Ottawa, Canada

Re: Sealing the Thermostat housing

#3 Post by justind97 » Mon Apr 10, 2017 11:11 am

There's someone on here that had taken the housing off, and machined a groove for an o-ring.

kampinguru
Posts: 84
Joined: Mon Dec 07, 2015 10:15 am
Location: Milton, Ontario

Re: Sealing the Thermostat housing

#4 Post by kampinguru » Mon Apr 10, 2017 1:43 pm

justind97 wrote:There's someone on here that had taken the housing off, and machined a groove for an o-ring.
That would be the perfect solution. If you want to run without a stat, something needs to provide the seal.

Bare
Posts: 1196
Joined: Sun Jan 29, 2006 2:18 am
Location: vancouver

Re: Sealing the Thermostat housing

#5 Post by Bare » Wed Apr 19, 2017 7:25 pm

You should be using the thermostat and it's rubber seal.
Which (the rubber ring) is the same part as that found on a Saab 900 or 9000.
Likely others as well. But that's what I have on hand.
Beyond that, Goop the hell out of the flange .. and hope

kampinguru
Posts: 84
Joined: Mon Dec 07, 2015 10:15 am
Location: Milton, Ontario

Re: Sealing the Thermostat housing

#6 Post by kampinguru » Mon Apr 24, 2017 8:59 am

Thanks guys. I broke down and bought the thermostat. All tight now.

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