[John_G]

A failed injector tube can cause that, check for combustion gasses in the coolant, a positive test warrants further tear-down of the engine until the cause is isolated.

 

[John_G]

If it popped the HG, there WILL be overheat codes, if it's a liner there often are no codes.

 

[John_G]

I have seen a lot of engines toen down and never a cracked liner from a scuffed piston. Cracked BLOCKs from excessively low coolant, yes more than once.

 

[John_G]

What is your question? What don't you understand about the post?
This scenario happens more than you think on the 466e. The last one we had like this came in with a gaping hole in the radiator from the excess pressure.

Sorry, for that to happen, the rad cap would have needed to be almost welded or glued shut. The industry has a problem with Rad caps NOT holding rated pressure - leaking off much lower than the rated pressure. We do not have a problem with caps sticking closed.

Now, if you have a radiator designed for a 7psi cap and some idiot puts a 15 psi cap on it because the truck is pushing water out, well all bets are off.

 

[John_G]

.....
LoL! Just what I was thinking!

 

[John_G]

[Moderator hat on]

Disagreement is fine but no bashing ok?

[/Moderator hat off]