rynojr4644

We lost #6 Piston so I had the head redone and replaced the piston and the injector. Truck was also overheating when this all happened. Now the truck starts getting hot like the water is not flowing thru the block? Do you think the water pump went bad also?

We looked at the block when the piston was out and it did not look cracked.

Also we are not getting and continues bubbles in the radiator so I really am ruling out a cracked block.

Any suggestions?

Thanks Dennis
04.5 Cummins

Andy505

Sounds to me like the overheating is what caused the piston #6 failure. I'd replace the water pump asap and see what it does.

rynojr4644

Replaced water pump and still seams to be air locked or somthing but starts overheating?
A buddy of mine said somthing about a heat exchanger?

GlennRMK

Did you change the thermostat as well?

rynojr4644

New stat was installed and tested before the water pump was done. Also cant get any heat out of the heater?

rogerL1961

sounds like your not getting water to flow somewhere...Start it cold...with the radiator cap off....watch the water as it heats up....you should see it start to flow when it reaches operating temp. Im sure you don't have exhaust leaking into the radiator fluid and no oil leaing into the water...Right?

pind

did you pull the high point threaded plug while adding coolant?

If not, you probably have one heck of an air lock in the system, causing your described problems.

And yes, no heat at the vents is indicative of an air lock in the system.

Good luck

rynojr4644

No I did not pul the plug but have looked at it several time. I will do it tonight. Thanks

mega-engr

This is the number one thing for you to do. You don't have to take it all the way out, but loose engough to let any air escape and let some coolant flow/leak past the threads and this should be good at that point. As posted earlier, no heat in the heater and overheat in the motor means you don't have flow...

I could not find the high point one time on a motor with a similar situation so I had to pop off the radiator cap while hot and that sure did blow the air out....

BigIron70

I agree pull the plug until you get a flow of coolant out. You have air pocket int the head, run engine with cap off until t stat open up. then top off your coolant.

rynojr4644

Not sure now didnt get to pull plug we started it last night after leaving the cap off all day. Found a small crack in exhaust man. and water was coming out might have a cracked head now?

rynojr4644

Milky oil! I think we are going to pull oil pan and pressure test system see if the block is cracked.