Coolant bottle absolutely CHURNS when I rev the rpm’s up. Combustion test came back negative for exhaust in coolant…new bottle, hoses, radiator, and water pump last year! EGR is dry as a bone. Thermostat stuck open maybe??
Blown head gasket??
Discussion in 'Ask An Owner Operator' started by wadeenterprisesllc, Apr 19, 2024.
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Rideandrepair and Tug Toy Thank this.
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Could be the air compressor if there's no combustion gases
W923, Rideandrepair, Tug Toy and 1 other person Thank this. -
Rideandrepair Thanks this.
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Look for black specks floating around in coolant. If you have them it’s a sure sign of combustion gas. The combustion gas kit has been known to lie on all makes all models
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Those combustion leak testers are trash IMO. Never had one work yet. Even a little Perkins with a 1" long crack between the valves didn't make it change colour.
I'd rule out the air compressor first.Deere hunter, Ruthless and Rideandrepair Thank this. -
My 12.7 did the same thing. No bubbles or excessive pressure at idle. Increased with RPMs. Coolant would blow out overflow while running to a point, then quit. Meanwhile it was also leaking into oil pan. It will separate and settle on the bottom. Might want to let it sit a little while. drain a bit, see if there’s any coolant in oil.
Jordonh and wadeenterprisesllc Thank this. -
Are you losing coolant?
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