No. I just put the cap on and put a gates powerclamp on it (was only a regular hose clamp first) and it does not leak.
BYPASS THERMOSTAT UPGRADE (PREVIOUSLY $28 upgrade)
- Thread starter TRS
- Start date
No. I just put the cap on and put a gates powerclamp on it (was only a regular hose clamp first) and it does not leak.
I put this bypass mod on my 12 800 last week......did a good 3 day ride in deep set-up snow (on the flatlands). Temp ran in the 105-109 range when in the good snow....still climbed up as normal on the trails until the scratchers went down.....then back to 107. Our outside temps were -5 to +3 celcius.
Great Mod, easy to do, would do it again in a heartbeat. Big Thanks TRS!
Great Mod, easy to do, would do it again in a heartbeat. Big Thanks TRS!
TSR
The skidoo thermostat will open sooner then the polaris stat but does not shut off the bypass circuit til 155'f.
So you have not completely fixed the problem, the skidoo stat will flow more coolant then the poalris.
This kit fixes the issues for high hp turbos and hard snow conditions keeping temps downs and HP up!
http://www.terraalpsracing.com/product/polaris-cfi-800-2008-2013-performance-kits
The skidoo thermostat will open sooner then the polaris stat but does not shut off the bypass circuit til 155'f.
So you have not completely fixed the problem, the skidoo stat will flow more coolant then the poalris.
This kit fixes the issues for high hp turbos and hard snow conditions keeping temps downs and HP up!
http://www.terraalpsracing.com/product/polaris-cfi-800-2008-2013-performance-kits
Anybody know what temp the older Polaris 600 bypass thermostat opens at? And if it is the same dimensions as the Skidoo one?
Guessing the TA housing uses the large Storm bypass thermostat but I do not know that for fact. I do still have a couple of those floating around though.
Anybody have the dirt? Not sure why skidoo would want the thermostat to start opening at 115-120 and leave the bypass open until 155? That makes zero sense to me. It is early though here, one coffee into the day. May be smarter by noon? : )
LH... These are the TA thermostats if that helps. He doesn't show the stock PRO RMK thermo though.
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The bypass disk is connected directly to the thermostat plunger.
Usually the bypass closes soon after the Thermo "cracks open"...having served its purpose....and the separate spring on the bypass disk allows the thermo plunger to move even after the bypass disk is resting against the housing.
The Ski Doo Bypass plunger does not seem to have this secondary spring in the photos above... maybe uses some diff mechanism to move the bypass disk??
I'm confused here as well.
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Usually the bypass closes soon after the Thermo "cracks open"...having served its purpose....and the separate spring on the bypass disk allows the thermo plunger to move even after the bypass disk is resting against the housing.
The Ski Doo Bypass plunger does not seem to have this secondary spring in the photos above... maybe uses some diff mechanism to move the bypass disk??
I'm confused here as well.
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At least on every bypass thermostat I've had my hands on in the last 30 years but all of them have been from Polaris sleds. Skidoo may well have a different design, but it makes no sense to me to allow it to short circuit the cooler for 35-40 degrees. Not saying he's wrong, just want to learn and discover their rational if it is indeed as he states. Thanks!
There is pics on the Terra Alps facebook page showing the stock polaris stat,
The bypass valve or disk as you called it doesn't close til 155'f on the skidoo thermostat
The bypass is fully closed at 120'f on the Terra Alps stat kit flowing 300% more coolant then the stock polaris stat.
This so called $28 fix will cost more then 28 dollars for the avg joe and still does not fix the problem. but to each there own.
The bypass valve or disk as you called it doesn't close til 155'f on the skidoo thermostat
The bypass is fully closed at 120'f on the Terra Alps stat kit flowing 300% more coolant then the stock polaris stat.
This so called $28 fix will cost more then 28 dollars for the avg joe and still does not fix the problem. but to each there own.
Why would a stat that opens at 99F not be done opening by 125-130F? A little pan of water and a thermometer would test the shut- off dealy. I'm thinking the cheap polypropylene housing has something to do with it. TRS has already found external heat affecting it, internal heat may have something to do with advertised numbers, and, of course, early model housings as Doo was finishing validation (during second year production?)
Okay, I'm assuming your user name is an acronym for Terra Alps Racing, and I have the proprietor of the billet housing and other useful information. With that assumption; will your thermostat fit in the skidoo plastic housing? Or is it larger like the mid nintey's Polaris thermostats? I have no issue with your thermostat or billet housing. I was hoping to cut some weight and gain effecentcy at the same time. Like I posted earlier I still have the large bulky cast aluminum storm style bypass thermostat housings kicking around and don't see spending ~$300 to get essentially the same thing.
Also IMO; looking to social media for technical information is counter intuitive and some of us old farts refuse to endorse FB because we see zero benefit from it, but that is just my spin and don't want this to take a wrong turn on my account. I can have the wife find me your FB if that is where I need to look. I just don't see most guys doing that.
LH..the Doo plastic housing is molded over the T-stat... not removable.
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LH..the Doo plastic housing is molded over the T-stat... not removable.
Bad assumption on my part.
I'll head another direction, thanks to all for their input.
The storm t stat lower housing is no longer avail.
It looks cool... I wonder what the thermostat itself looks like inside.
It looks cool... I wonder what the thermostat itself looks like inside.
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The storm t stat lower housing is no longer avail.
It looks cool... I wonder what the thermostat itself looks like inside.
I'll dig one out and email you a pic to post. Exactly the same as the current bypass thermostats just much larger ( like the physical size of the ones in the muscle car V8's). I've machined and welded custom aluminum housings for them over the years for my mods. Actually put it upside down inset into the "U" cooler. To clean up the engine compartment in my triple cylinder EDGE chassis.
93 storm housing. When I disassembled I found the thermo had separated.
The 2003 XCR housing should work. The thermo from 96-03 was a 120* stat. part#7051017. The top housing fits from 93-03 part#5130942. The bottom housing changed for MY1999. 99-03 bottom housing part#5132025.
The 2003 XCR housing should work. The thermo from 96-03 was a 120* stat. part#7051017. The top housing fits from 93-03 part#5130942. The bottom housing changed for MY1999. 99-03 bottom housing part#5132025.
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....thanks TRS
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