New Holland TN 90

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New Holland TN 90

FixinCat

New Holland tractor, 4cyl engine. 1093 hours. Started pushing coolant out of overflow. But tractor is not overheating. Replaced thermostat anyway, but no change. No coolant in exhaust, no coolant in oil. With cold engine, run it about a minute. top hose gets very very tight. Does not push coolant out at this point, but when you crack open the cap, it seems to suck air in, and spits out of the overflow tube....never seen anything like this....has anyone? I thought it was head gasket at first...but there is no coolant in oil or exhaust...Any suggestions or help is greatly appreciated...thank you everyone.

Kevin

The best thing to do if you think it is a head or headgasket is to leave the coolant cap off and let it run and see if you see bubbles in the coolant. Fill the coolant and just let run at 1000 r.p.m and let it get up to opp temp. if you see bubbles cracked head or gasket. Unless this tractor has gotten very hot not very likely its a head problem.

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