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1985 John Deere 1050 2WD Coolant Bubbles

G

GrowinBucks

New User
Coolant System. Flushed completely till ran clear, new hoses, new thermostat and gasket, new coolant, getting new rad cap today. This is the overfill tank.

Idled for 30-45min...no change. With cap off the water swells to top then pops the bubble. Over and over.

With cap on and let pressure build, when remove cap you can here water settle back down in system with engine off.

No water or oil mixture in either crank nor radiator.

Unless it's a huge air pocket it looks to me like its air pumped in...

I'm thinking head gasket...what say you?
[video play=false:9cd876e38c]https://forums.yesterdaystractors.com/videos/mvvideo33114.mp4[/video:9cd876e38c]
[video play=false:9cd876e38c]https://forums.yesterdaystractors.com/videos/mvvideo33115.mp4[/video:9cd876e38c]
 
My thoughts are you are right in thinking it is a bad head gasket.

With the engine cold, start it up and let it run for 30 seconds then shut it off.
Now try squeezing your rad hose, if it is hard as in under pressure in this short of a time then not much else it could be.
 

"I'm thinking head gasket...what say you?"

Could just as well be a cracked head, not unheard of if it's been abused/overheated.
 
I have seen 3020-4020's that would get a pin hole in a sleeve letting compression in the cooling system. No water in the engine oil and no oil in the radiator. It did push the seal out of the water pump on one of them. Tom
 
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