Blown head gasket?

[rustred]

Oh I was curious why you said to replace it than

I didn’t say to , I was wondering myself why ???

 

[rustred]

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

Waste of time .

 

[Farmall m farmer]

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.

So you think I need to pull the head and not test anything i already used a headgasket tester and it said the headgasket was good

 

[Farmall m farmer]

I will check the head bolts torque before I rip it apart though

 

[rustred]

I will check the head bolts torque before I rip it apart though

That’s not going to go a thing on an engine sitting for 20 years. It’s all going to be stuck tight. It’s not like the engine was just assembled and the threads are free. Try it if you want but I have yet to see that process work. Plus crack each nut loose first. Just trying to tighten them won’t cut it.

 

[used red MN]

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

It doesn’t take much compression leaking into the coolant to make it bubble or push coolant out. I am not sure how reliable those cooling system test kits are. What does the literature say about accuracy of the test and possible causes of faulty results?

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

A forum gives you information to use, the information is based on knowledge, experience and to a degree opinions. It is up to you to decide what information you use or bypass. I think this reply is relying on an opinion of how this individual would approach this machine. I personally see where you are coming from, the items mentioned don’t seem to be a direct cause of your problem. I will leave it at that. The torque of the head bolts/nuts, yes definitely could be a contributing fact.

 

[Ray,IN]

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

Right now it''s immaterial which cylinder is leaking compression into the coolant system. You know it's happening, pull the head and replace the gasket, unless each cylinder has a standalone head.

 

[Jim.ME]

When you say you used a head gasket Leak detector, what type was it? If it uses a fluid in a tube, did you have the right fluid for a diesel? The Lisle 75500 I have required two different fluids depending on whether the engine is gas or diesel. In the kit the fluid for gas comes with the tester hard parts, the diesel fluid was a separate purchase item. Just curious as to what tester you used.

 

[Fritz Maurer]

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.

There is no reason that should not work, although it may take a little longer since the compression is considerably higher pressure than shop air.

 

[Fritz Maurer]

Right now it''s immaterial which cylinder is leaking compression into the coolant system. You know it's happening, pull the head and replace the gasket, unless each cylinder has a standalone head.

It might not be the gasket.... then what? You have to know where to look. Which cylinder is leaking is quite the contrary very important information.

 

[Fritz Maurer]

One other avenue in lieu of removing the pan is to pull all the injectors and put pressure in the cooling system, and spin the motor after awhile and the affected cylinder will be obvious when the coolant blows out.

 

[Ray,IN]

It might not be the gasket.... then what? You have to know where to look. Which cylinder is leaking is quite the contrary very important information.

Where else can compression get into the cooling system?

 

[rustred]

Where else can compression get into the cooling system?

Right through the sleeves. Cavitation or electrolysis . Cracked head , head gasket . To find cracks the block and head should be magna-fluxed. You don’t just replace a gasket and hope for the best. You
Got up have eyes on the actual problem.