700cc White Smoke and Brown Sludge

I

ippielb

Free Member

Jan 4, 2011

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Saskatchewan Canada

• Nov 16, 2011

• #1

I just finished everything on my sled, every last thing, and i start it to load it on my truck. And right when it starts exhaust is clean. But right when it warms up the exhaust smoke starts turning white. I took the plugs off and they are wet. When i started it a couple weeks ago there exhaust wasn't white at all, just the normal 2 stroke smoke. And where the exhaust is on the sled, it drips a chocolate milk colored sludge...

What is the most common seal to go? inner head o-ring? Or base gasket? I hope it's not the case seal. I don't want to pull the engine again, the season is just beginning.

Thanks for reading!

:faint:

 

B

Braaap12

Free Member

Jan 20, 2009

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• Nov 16, 2011

• #2

almost sounds like a head gasket?

 

I

ippielb

Free Member

Jan 4, 2011

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Saskatchewan Canada

• Nov 16, 2011

• #3

I just put new head o-rings on in April. And the engine hasn't been apart since. Both plugs are wet though is what concerns me! I hope it's not the crank case seal!

 

F

Firetrail

Well-known member

Nov 29, 2007

533

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Sioux Falls, South Dakota

• Nov 16, 2011

• #4

Smoke

White smoke sounds like coolant in the combustion. Coolant and oil mix will give you the chocolate milk looking stuff. Sorry to say it sounds like head gasket O rings to me. Somewhere you are getting coolant where it should not be. I am thinking that maybe it is an O ring. Maybe popped out of the groove in a spot. When the sled heats up and the coolant starts circulating under pressire it runs a little past the ring.

 

Last edited: Nov 17, 2011

I

ippielb

Free Member

Jan 4, 2011

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Saskatchewan Canada

• Nov 16, 2011

• #5

I will buy two inner o-rings and try that. Why would the o-ring screw up like that? I've only ridden the sled 2 times after i replaced the o-rings. Started the sled every two weeks during the summer with no white smoke. I'm fine with fixing the leak, but that's not fixing the problem if it happens again.

 

F

Firetrail

Well-known member

Nov 29, 2007

533

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Sioux Falls, South Dakota

• Nov 17, 2011

• #6

O ring

I would hope that when I take off the head I see that the o ring has been flattened from coming out of the groove. If not you may have bigger problems. Crack in the jug or head would be bad, Maybe you got a small piece of something between the head and jug and the surfaces didn't mate right. Possible the head or jug surface is not flat and has a little warp. Be sure and check them with a straight edge as they do warp a little sometimes. A good machine shop can true them up if need be. Make sure you torque the head bolts in a pattern and to the right specs. After that I am not sure where you need to go. I also would not be thrilled if there was a lot of coolant in the crank case. That should be be cleaned out if it is there. All this is just speculation on my part. Hope it is something simple.

 

Last edited: Nov 17, 2011

Blk88GT

Westbound and down

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Nov 26, 2007

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Winnipeg, Manitoba

• Nov 17, 2011

• #7

It's possible they got pinched during install or the head wasn't torqued properly.

 

S

sledtahoe

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Feb 21, 2009

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• Nov 17, 2011

• #8

^^^

Blk88GT said:

It's possible they got pinched during install or the head wasn't torqued properly.

Click to expand...

What he said it happens kinda easy...