Blown head gasket?

[Farmall m farmer]

I’m stumped my backhoe pukes coolant out of the radiator cap so I got a new 7 pound generic cap from Napa that’s what the manufacturer called for it had a 10 pound in it before I pulled it the backhoe out of the weeds probably a year ago with a very recent engine rebuild hours wise. The guy I got it from he had ran it dry of oil and locked up the motor so his brother a good experienced mechanic rebuild it than by this time he had bought a new backhoe so he didn’t put very many hours on my backhoe it was fine until about 2 months ago when I was driving down the road and that’s when it started blowing coolant out of the radiator cap last week I got one those head gasket Leak detector and followed directions and it tested good we pulled the cap off with it running and it got to about 160-165 and it just bubbled out of the filler neck and I think the radiator has a hole in it would that do it? Not sure. It does not burn coolant or get any in the oil I’m at a loss any ideas

 

[rrlund]

You're sure it wasn't just over filled and leaking out from heat expansion?

 

[rustred]

i presume its a diesel ? what make model and engine ? if you can physically see the bubbles then no dought you have compression leaking into the coolant. a hole in the rad has nothing to do with coolant blowing out. cause would be cracked head or head gasket. loosen the fan belt and disconnect it and fill the rad to the top and start it, if its bubbling then its tear down time. i presume you have a thermostat in it also.? and when an engine runs out of oil that requires a bare block rebuild, including turning crank and replacing all engine brgs including the cam shaft brgs. pretty much start from scratch. but what was done to it ?

 

[Farmall m farmer]

You're sure it wasn't just over filled and leaking out from heat expansion?

Yes I’m sure the radiator level just to the bottom of the top tank

 

[Farmall m farmer]

i presume its a diesel ? what make model and engine ? if you can physically see the bubbles then no dought you have compression leaking into the coolant. a hole in the rad has nothing to do with coolant blowing out. cause would be cracked head or head gasket. loosen the fan belt and disconnect it and fill the rad to the top and start it, if its bubbling then its tear down time. i presume you have a thermostat in it also.? and when an engine runs out of oil that requires a bare block rebuild, including turning crank and replacing all engine brgs including the cam shaft brgs. pretty much start from scratch. but what was done to it ?

It’s a case 580c backhoe it’s a diesel I’m not sure what model engine I will look I’m not sure what was done to it the engine got rebuilt probably 20-25 years ago the guy that did it is dead and the PO didn’t remember exactly I was just told it ran dry of oil and he rebuilt it

 

[rustred]

It’s a case 580c backhoe it’s a diesel I’m not sure what model engine I will look I’m not sure what was done to it the engine got rebuilt probably 20-25 years ago the guy that did it is dead and the PO didn’t remember exactly I was just told it ran dry of oil and he rebuilt it

should be 207 cid diesel engine. ooh wow thats years ago . and if it was sitting all this time that dont help matters. could be a head gasket.

 

[Farmall m farmer]

should be 207 cid diesel engine. ooh wow thats years ago . and if it was sitting all this time that dont help matters. could be a head gasket.

That’s my gut feeling I hope it’s just a head gasket and not a cracked head or block I’ve all ready had to replace the rear main seal because it dried up and started leaking

 

[Roger in Iowa]

Yes I’m sure the radiator level just to the bottom of the top tank

To check for compression bubbles in radiator the radiator has to be full to the very top.

 

[Mule Meat]

I would begin with the simple since it sat in the weeds for so long.

Belts
Hoses
Water pump. A new water pump for a 580C only cost about $50.

Then I would check to see if the Head bolts were torqued to final specs.
Nuts - 95 - 105 ft lbs
Bolts - 105 - 115 ft lbs

 

[Fritz Maurer]

If all of the above fails, you should put pressure tester on it if possible. Take the pan off and note where the water is coming from.

If it turns out to be a difficult to find leak, it would be helpful to know which cylinder was leaking from, so your inspection can be concentrated in a small area. Be as careful as you can peeling the gasket off, so as not to destroy any evidence.

 

[cjunrau]

If all of the above fails, you should put pressure tester on it if possible. Take the pan off and note where the water is coming from.

If it turns out to be a difficult to find leak, it would be helpful to know which cylinder was leaking from, so your inspection can be concentrated in a small area. Be as careful as you can peeling the gasket off, so as not to destroy any evidence.

Is it possible to pull an injector and hook an air compressor into the hole and ad air like that to check a head gasket leak. I don't know if this sounds nuts or not, just a brain fart.

 

[Farmall m farmer]

To check for compression bubbles in radiator the radiator has to be full to the very top.

I filled it up today and I still got bubbles

 

[Farmall m farmer]

I would begin with the simple since it sat in the weeds for so long.

Belts
Hoses
Water pump. A new water pump for a 580C only cost about $50.

Then I would check to see if the Head bolts were torqued to final specs.
Nuts - 95 - 105 ft lbs
Bolts - 105 - 115 ft lbs

My belts are in good shape and tight what would the water pump have to do with it doesn’t leak?

 

[rustred]

To check for compression bubbles in radiator the radiator has to be full to the very top.

Not really , all depends on the leak. If you start the engine and it’s pushing coolant out , u know u have a problem. He said it was pushing it out.

 

[Farmall m farmer]

Is it possible to pull an injector and hook an air compressor into the hole and ad air like that to check a head gasket leak. I don't know if this sounds nuts or not, just a brain fart.

Thats what a friend said to do but he said to pressure the cooling system and then bump it over with injectors out and see which cylinders had water in them I was going to try that before I pull the head

 

[rustred]

My belts are in good shape and tight what would the water pump have to do with it doesn’t leak?

Nothing !

 

[Farmall m farmer]

I haven’t done anything major yet because I’ve got to finish putting in a water line before it freezes for the year when I get it done I will pull the injectors and test it

 

[Farmall m farmer]

Nothing !

Oh I was curious why you said to replace it than

 

[trackrat]

Head gasket or cracked head most likely cause of problem, wish I had a better idea for you

 

[rustred]

Thats what a friend said to do but he said to pressure the cooling system and then bump it over with injectors out and see which cylinders had water in them I was going to try that before I pull the head

Your compression is by far gonna go
into the rad before it leaks into the cylinders. 500 lbs vs 10 lbs,… where do u think the compression will go.