coolant leak at GP

[greenskeeper]

My BIL picked up an 04 yesterday with 144k miles. Zero blowby when removing the oil filter cap.

First problem there is a coolant leak at the GP on the passenger side. Only leaks when sitting cold and isn't enough to make a spot on the driveway. The leak goes away while the engine is running.

I told him at the worst case he needs a new head, and while in there he should bulletproof the engine engine.

Prior to going that far, is there an o-ring or anything that can be checked?

I've never worked on a 6.0 but have two 7.3s sitting in my driveway.

 

[79jasper]

Any chance he has a pressure gauge on the coolant system?

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[greenskeeper]

Any chance he has a pressure gauge on the coolant system?

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no. he is going to clean the engine and look for the leak.

 

[greenskeeper]

He drove the truck about 300 miles and the coolant level hasn't gone down a bit. Just wet now around the glow plug. Hooked up to my AE and the coolant/oil temps never exceed 5 degrees difference during level driving.

 

[79jasper]

If it is actually coming from the glowplug, they sit in a cup. Much like the Injector cups.
While they can be changed with the special tools, it appears most just replace the head.

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[Ford F-350 Man]

There's no way coolant is leaking from a glow plug, and coming to the outside... There is an air gap between the hole in the rocker box, and the top of the head where the glow plug sits. Has he actually pulled the glow plug boot and or passenger side valve cover to inspect it further?

Most likely the wetness is oil leaking through or around the plug. Just order a new glow plug harness and call it a day...