Standard RMK VS Pro Cooling System

gunnerthesnowman said:

I added the front cooler to my 2012 pro BB , best $150 I ever spent , the tubing to the front cooler is smaller , so with the T-stat closed the front cooler always flow ( takes a little longer to warm up from cold starts ) once the T-stat starts to open there is enough pressure in the system to make the coolant flow to the main cooler.
I also run Terra Alps T-stat , with both of these mods , my sled runs 37-40 C

Click to expand...

AndrettiDog said:

I guess it comes down to where and how you ride. Here in Colorado I've never really had a problem overheating. I'm accustom to putting down my ice scratchers on the trail. The only time I've seen issues heating up was on a dirt road in the spring, but everyone was struggling.

Are you guys that want more cooling riding the trails a lot or is there another reason for the issues over heating? The third cooler seems helpful. It does add a little weight.

Click to expand...

gunnerthesnowman said:

I added the front cooler to my 2012 pro BB , best $150 I ever spent , the tubing to the front cooler is smaller , so with the T-stat closed the front cooler always flow ( takes a little longer to warm up from cold starts ) once the T-stat starts to open there is enough pressure in the system to make the coolant flow to the main cooler.
I also run Terra Alps T-stat , with both of these mods , my sled runs 37-40 C

Click to expand...

live to ride said:

hey gunner, would you mind sharing some info on your front cooler install? is it the rmk cooling system? was it a complete kit? how difficult was it to install? thanks

Click to expand...

gunnerthesnowman said:

Go to this link ,it was not my idea , it show and talks about some of the details , he made his cooler 15" long , I made mine 18" long ( as I installed a 870 big bore motor ), its two 4" welded together, fits right between the stock tunnel cooler

http://www.snowest.com/forum/showthread.php?t=324778

Click to expand...

gunnerthesnowman said:

I added the front cooler to my 2012 pro BB , best $150 I ever spent , the tubing to the front cooler is smaller , so with the T-stat closed the front cooler always flow ( takes a little longer to warm up from cold starts ) once the T-stat starts to open there is enough pressure in the system to make the coolant flow to the main cooler.
I also run Terra Alps T-stat , with both of these mods , my sled runs 37-40 C

Click to expand...

AndrettiDog said:

I guess it comes down to where and how you ride. Here in Colorado I've never really had a problem overheating. I'm accustom to putting down my ice scratchers on the trail. The only time I've seen issues heating up was on a dirt road in the spring, but everyone was struggling.

Are you guys that want more cooling riding the trails a lot or is there another reason for the issues over heating? The third cooler seems helpful. It does add a little weight.

Click to expand...

Merlin said:

Good evening,





I've been reading about how much more effective the cooling system is on the standard RMK model over the Pro yet after examining the plumbing of the coolers on the standard model, I'm at a loss as to why?



It would appear that the front heat exchanger on the standard RMK would see maximum flow until the thermostat starts to open at which point the flow would begin to pass through the rear coolers. Given the logic that a fluid takes the path of least resistance it's surprising that the RMK doesn't actually run hotter as the coolant would favor the front cooler circuit over the rear when the thermostat is wide open? You'd think the cooling system would be more effective if all three coolers were plumbed in series?



One can't argue with the fact that the standard RMK runs cooler than the Pro, I just wish someone would explain how it's possible.

Click to expand...

Rick! said:

You'll notice that the fittings on each loop of the system are carefully sized to provide the right balance, or flow split between the loops. Couple that with each loop's flow resistance and the bottle collection point and large diameter WP inlet and the cooling done by each loop matches the engine heating very well. The regular RMK doesn't suffer from the the same issues as the Pro. IMO, the Doo or aftermarket stats are not necessary on the regular RMK.

Click to expand...