turbo 6.9 over heating

[The_fabricator]

im thinking it has a blowin head gasket but im not 100% sure. Changed the rad and thurmostat but still over heat's and when i pull the rad cap off when its cold and start it up it pushes alot of coolent out. So that's why im thinking head gasket.

Thanks Mike

 

[hesutton]

Mike, I had a similar problem with my 6.9. But, mine only puked coolant when pulling the camper, but still very similar. When I pulled it out, this is what I found:

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The gasket failed at the #1 cylinder. Found out why at the machine shop. The deck was warped there.

I hope that isn't your problem as it's not a fun thing to find and repair.

Heath

 

[The_fabricator]

hmmm k thanks

 

[Kevin 007]

You could try to re-torque the heads if you need to get by for a bit longer till you replace it...
6.9's need to have heads retorqued at 30,000miles after leaving the factory, then they are good. But most 6.9's out there have never had that done and lo and behold...head gasket issues down the road

 

[The_fabricator]

good to know thanks

 

[The_fabricator]

ttt

 

[Black dawg]

what conditions does it overheat in?
does it puke fluid?

 

[The_fabricator]

it starts to over heat and puke out the over flow bottle after about 10 to 15 min of driving upper rad hose and heater core hose's are also very hot and under a lot of pressure

 

[Agnem]

If it's puking, you have a cracked head or bad head gasket. You may be able to isolate the head the problem is in by removing all the injectors and glow plugs from one head, and then cranking it to start it while someone watches the coolant for bubbles. Another pair of eyes could watch the open bores to see if coolant is shooting out. Just an idea. It won't run that way, but the cylinders will fire, and you may be able to isolate the head easily.

 

[The_fabricator]

good info thanks ill try that tonight

 

[Black dawg]

I prefer to remove the rocker arms and air up the cylinders individually.

 

[The_fabricator]

yep its the head gasket

Thanks for all the pointers Cheers Mike

 

[Black dawg]

did you yank the heads?