Issue on Sidewinder... need some help or ideas.

[MrSled]

My thoughts are a leak or Head gasket... now this is whats strange. No signs of leaking, drives and runs perfect, no overheating, no loss of power, no smell of antifreeze. Fill over flow tank to line. drive 30 to 40 miles. No loss of antifreeze. Keep on driving until about 70 to 80 miles tank empty. Refill it and keep on going , no loss again until we hit about 70 miles. We randomly check out from 0 to 70 miles and it stays at line or above the line when hot.... WTH

 

[cannondale27]

Gotta be a leaky line somewhere. I would look at the ones under tunnel. Conditions were right for extreme icing last few weekends. That ice can move things.

 

[KnappAttack]

My thoughts are a leak or Head gasket... now this is whats strange. No signs of leaking, drives and runs perfect, no overheating, no loss of power, no smell of antifreeze. Fill over flow tank to line. drive 30 to 40 miles. No loss of antifreeze. Keep on driving until about 70 to 80 miles tank empty. Refill it and keep on going , no loss again until we hit about 70 miles. We randomly check out from 0 to 70 miles and it stays at line or above the line when hot.... WTH

Dang, makes me wonder if it's that cracked head syndrome like a few have had where the anti-freeze is getting into oil. ???

 

[MrSled]

Gotta be a leaky line somewhere. I would look at the ones under tunnel. Conditions were right for extreme icing last few weekends. That ice can move things.

Been fighting this on my buds sleds all season.. It has to be a leaky clamp or something.. the damn sled runs perfect.. oil looks perfect, no hard starting.. all the signs of a head gasket are not there.

 

[72Gran]

What about a coolant leak at the turbo. The turbo is so hot it just vaporizes the coolant and you don’t see or smell.

 

[MrSled]

What about a coolant leak at the turbo. The turbo is so hot it just vaporizes the coolant and you don’t see or smell.

We had a leak on that line before, Ill double check that line again..

 

[jonlafon1]

Any chance its going out the overflow tube under motor? Any way you could pressure test it?

 

[MrSled]

Any chance its going out the overflow tube under motor? Any way you could pressure test it?

I am going to pressure test system this week. I thought maybe it was pushing it out but there is no signs of that.

 

[jonlafon1]

I had a really strange thing happen to mine a couple weeks ago. I had a small spot under my sled one morning and thought I had a leak somewhere.. IT HAD to of come out the overflow tube under motor as I saw a very slight drip coming from the holes under by the access panel. I looked EVERYWHERE after returning home and trying to find it.. Still a mystery to me.. So after this /slight drip I drove it 1300 + miles in 10 days and the anti freeze never moved? So for some reason my sled burped a few ounces out the overflow???

 

[SledFreak]

It maybe the one down under the motor to the lower heat exchanger? Its probably a clamp you have not checked yet or cant see?

 

[MrSled]

It maybe the one down under the motor to the lower heat exchanger? Its probably a clamp you have not checked yet or cant see?

I hope so.. I am thinking the pressure test should get her to leak.

 

[72Gran]

I was thinking internal on the turbo. If there is a crack in the coolant passage? Typically an external leak leaves some evidence especially in the snow.

 

[MrSled]

I was thinking internal on the turbo. If there is a crack in the coolant passage? Typically an external leak leaves some evidence especially in the snow.

How do find that? But wouldn't it loose coolant all day , why 70 miles?

 

[TPAY243]

Did you check the oil level to make sure it's not getting into the oil somehow.

 

[MrSled]

Did you check the oil level to make sure it's not getting into the oil somehow.

Sure did!! I posted that in my info.