Marley
Active VIP Member
REV 600 HO SDI - first the overheating problem: the sled has had intermittent overheating problems usually controlled by jumping into some deep snow. Last time out same thing but at the end of the day nothing worked to cool it down.
What I know:
engine temp sensor says it is too hot,
the heat exchanger at the back of the tunnel is cool to the touch,
The coolant cap seems to work fine,
System is full of coolant,
With cap off and engine revved, coolant is coming (pumping?) up inside the internal tube inside the tank.
Now the starting issue is only when it is cold. Takes 10-15 seconds of cranking to get the engine fired. (My 2011 Summit X fires in milliseconds) When warm it starts fairly quickly. It puts out a lot of smoke when cold.
I'm hoping it isn't the circ pump as that looks like a pain to get to and work on...
I haven't pulled the thermostat yet as it appears it has to be taken out from the underside. Pulled the hose fitting on the of the thermostat and coolant appeared to be getting by (wiped off the coolant and more came up).
Any ideas where to go from here?
What I know:
engine temp sensor says it is too hot,
the heat exchanger at the back of the tunnel is cool to the touch,
The coolant cap seems to work fine,
System is full of coolant,
With cap off and engine revved, coolant is coming (pumping?) up inside the internal tube inside the tank.
Now the starting issue is only when it is cold. Takes 10-15 seconds of cranking to get the engine fired. (My 2011 Summit X fires in milliseconds) When warm it starts fairly quickly. It puts out a lot of smoke when cold.
I'm hoping it isn't the circ pump as that looks like a pain to get to and work on...
I haven't pulled the thermostat yet as it appears it has to be taken out from the underside. Pulled the hose fitting on the of the thermostat and coolant appeared to be getting by (wiped off the coolant and more came up).
Any ideas where to go from here?