Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Have you checked the EGR cooler?
Sorry I should have said that differently, have you pressure checked the cooling side of the egr cooler. We have a tool for it in the dealership but with a few hoses you can make one and use your coolant pressure tester.
I have seen several of them leak.
internally and can be hard to pin point.
That was my only idea at this time, I'll opt out and see what others my have for you. If anything else comes to mind, I'll check back in. Good luck.
Hi there, I am Cam. Can I get your first name pleasE?With your truck, did you check the heads for being warped?
Ok, if idling, do you get any bubbles after idling? TO get that kind of pressure still suggests head gaskets.
Ok, so to get pressure like that in the cooling system can only be head gaskets or heads. Now I will admit I a have not seem many heads with issues, but its possible. You checked out warpage, did you have them pressure tested by a head shop?
Did you check the deck for warpage? Also what happened originally? Did it overheat? Let me also check a couple other things. Give me 10 mins.
If it overheated in the process and hydrolocked, that is bad. Its very possible there is a bit more damage in the engine. How long did you run it when checking for bubbles? Did you bring the idle up?
No and doubted it damaged lower end, but combustion chamber is my concern. TO push out like that can only be cylinder so we missed something in there. I am thinking you need to have the cylinder heads pressure tested, check deck warpage and likely replace the heads.
The issue is though that the amount of pressure it takes to push coolant into the cylinders is more than you can get in the coolant system without doing damage.
To build pressure like that in the cooling system, no. The only thing I have ever seen cause it to build that much pressure is the heads.