Head gaskets ?

[BLK]

6.4 no mods. Loses coolant out the degas cap only sometimes but mostly while hauling or towing light loads.
No white smoke, no coolant in oil, truck runs normal- strong.

Mechanic says EGR cooler is fine but motor needs head gaskets. Wouldn't I see coolant in the oil?

 

[jus10keith]

Not necessarilly. I had the same issue with mine and it was just letting the excess cylinder pressure into the cooling system and blowing it out the de-gas bottle.

 

[f350guy]

Does he know there are two EGR coolers?

My truck (original owner, Job 2, '09) lost the horizontal cooler years ago. Around 40-60k I guess. No internal coolant showed on the oil samples. Only way I noticed it was leaking out of my EGR blockoff plates!

 

[sootie]

i would strongly suggest checking the egr coolers. they are prone to cracking.

Head gaskets are extremely rare on stock trucks

 

[kleake]

Like the others mentioned, EGR coolers are the first suspect on a stock truck, but I just went though the head gaskets on mine because of the exact symptoms you are having. Mine started only when towing or staying on the throttle hard for more than 2-3 seconds. Eventually it got bad enough I couldn't go over half throttle and it would do it. Head gaskets and studs (along with several other preventative items) fixed her up. How many miles are on yours?

 

[ajklaus97]

Mine is doing the same thing. Except my egr is ******d. Did a coolant pressure test and it never once went over 16.5, 17 lbs. Dealer says needs head gaskets. Not trying to high jack the thread or anything just seeing everyone's thoughts.


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[kleake]

If yours is puking under heavy throttle, and is del-ted, you likely are looking at gaskets. I just did mine for the same reason. Got a big thread of the repair.

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