2022 2500 6.4l blows top radiator hose when towing

[keithhud]

Hopefully the dealer you bought it from will be willing to help you out.

That's what I am hoping as well.

 

[Crusty old shellback]

I'm at 4 1/2 years and 107K. And I drive it like I stole it.

Maybe it overheated once or twice?

 

[keithhud]

Heard back from the shop. They are saying there is a crack is between the exhaust port and cooling on the block? So they are recommending a whole new motor. it would could with a 3 year 100k warranty. I am just beside myself right now. Once I have the quote, I'll submit it to the dealership and see where we go from there.

 

[whitexc]

Wow. Sorry for the troubles. That’s a pretty rare failure in my opinion. As stated, wondering if it ran hot a time or two. That’s impressive miles on a 2022. My ‘21 is about to roll 40k. Imma shed a tear.


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[jetrinka]

Heard back from the shop. They are saying there is a crack is between the exhaust port and cooling on the block? So they are recommending a whole new motor. it would could with a 3 year 100k warranty. I am just beside myself right now. Once I have the quote, I'll submit it to the dealership and see where we go from there.

I'm assuming they're saying there is a crack in one of the cylinder heads from an exhaust port into a cooling passage internal to the head?

How did they verify this without a tear down? And how did they verify combustion gasses in the cooling system indicating either a blown head gasket or crack in the block or a head? Did they perform a block test first?

Hemi head gasket failures are extremely rare. A crack into a coolant passage even more-so. Confirmation of a crack certainly requires disassembly of the engine and usually sending the heads to a machine shop for a pressure test.

Anything is possible but man I'd want a better explanation than just "hey it needs a new engine." Sounds very lazy to me....

 

[keithhud]

I'm assuming they're saying there is a crack in one of the cylinder heads from an exhaust port into a cooling passage internal to the head?

How did they verify this without a tear down? And how did they verify combustion gasses in the cooling system indicating either a blown head gasket or crack in the block or a head? Did they perform a block test first?

Hemi head gasket failures are extremely rare. A crack into a coolant passage even more-so. Confirmation of a crack certainly requires disassembly of the engine and usually sending the heads to a machine shop for a pressure test.

Anything is possible but man I'd want a better explanation than just "hey it needs a new engine." Sounds very lazy to me....

Great points. The crack in the block comment came from speaking with the Service Tech over the phone so it's a little different than what was written up. Not sure if that's from their own experience or what. Here is what the diagnostics in the quote I received on Saturday had to say: Engine oil appears okay, coolant level in expansion tank is low. Add fluid run vehicle for 5 minutes. Temperature gauge never showed above half. But pressure building in system. Road test vehicle and Use for gas analyzer. Found hydrocarbons climbing above 100 parts per million at idle. Indicating exhaust breach into cooling system. When towing vehicle suspect breach getting worse causing pressure to go above regulated cooling system pressure. Recommend remove cylinder heads and inspect.

Yes you are correct, the heads need to be removed to verify a crack or blown head gasket. I forwarded the quote over to the dealership I purchased the truck from and as I expected they want to conduct their own diagnostics which is fine. Now I just have to schedule time to drive the truck two in a half hour's back to the dealership.

 

[jetrinka]

Great points. The crack in the block comment came from speaking with the Service Tech over the phone so it's a little different than what was written up. Not sure if that's from their own experience or what. Here is what the diagnostics in the quote I received on Saturday had to say: Engine oil appears okay, coolant level in expansion tank is low. Add fluid run vehicle for 5 minutes. Temperature gauge never showed above half. But pressure building in system. Road test vehicle and Use for gas analyzer. Found hydrocarbons climbing above 100 parts per million at idle. Indicating exhaust breach into cooling system. When towing vehicle suspect breach getting worse causing pressure to go above regulated cooling system pressure. Recommend remove cylinder heads and inspect.

Yes you are correct, the heads need to be removed to verify a crack or blown head gasket. I forwarded the quote over to the dealership I purchased the truck from and as I expected they want to conduct their own diagnostics which is fine. Now I just have to schedule time to drive the truck two in a half hour's back to the dealership.

That makes a little more sense. Certainly combustion gasses straight into the cooling system would cause sudden pressure spikes that the expansion cap couldn’t deal with.

Keep us posted. Thanks for the details.