View Full Version : 04 PSD loosing coolant

May 12th, 2010, 09:48 PM
cant figure out WTF is going on.

04 6.0 PSD.

keeps loosing coolant, oil is clean, cant find any leaks or any coolant on the ground.

yesterday didnt have any heat (yet again) took 1 gallon to fill up the over flow.

9/10 its used for pulling a 36ft goose with 2 jeeps on it.


May 12th, 2010, 10:11 PM
Maybe check these things below but check that heater core hose fitting and restrictor even though yours is not an econoline since you have heater issues as well.

Coolant Expelling From Degas Bottle:
Trucks built with the 6.0 PowerStroke engine may exhibit coolant loss, low coolant, or coolant blowing out of the degas bottle. First, ensure the coolant level is not too high and the expulsion is not due to normal expansion. The coolant level in the bottle at normal operating temperature should be at the MIN mark. 2005 trucks should be checked to see if recall 05B32 applies to them.
The coolant bottle cap should be checked to see if it is capable of holding 16 PSI, and it is sealing properly on the coolant bottle. Pressure test the cooling system to verify there are no leaks. Note: It is advised to either disconnect the right exhaust manifold from the right side turbo Y-pipe, or to raise the rear of the vehicle and remove the EGR valve to check for an EGR cooler leak. Failure to do so may result in a hydralically-locked cylinder. Repair any leaks as necessary.
Inspect the coolant for oil, which would indicate a leaking oil cooler. Check the engine oil sensor reading against the coolant temp sensor. An EOT that is 25 degrees higher may indicate a failed oil cooler. On Econolines, if the engine oil cooler is replaced, the heater core inlet hose should be replaced with part 5C2Z-18472-AA, which includes an internal restrictor. If oil is present in the cooling system, the system will have to be cleaned using a solution of 1/2 cup low-sudsing liquid dishasher detergent to six gallons of water, possibly up to three times. Flush the system afterwards with clean water.
If the coolant expulsion occurs under high load conditions, suspect head gaskets that are leaking compression into the cooling system. It may be necessary to test drive the truck with a pressure gauge TEE'd into a hose and the cooling system sealed so it will not vent to verify over-pressure. When replacing the head gaskets, it is necessary to install new head bolts--they are not reusable. There is a revised torque sequence and specification for the head bolts. The head gasket kits have been revised to include parts needed in the service, but the gaskets themselves are not updated. Recommend using kit 5C3Z-6079-B, which includes all parts for both sides of the engine and covers 2003-2005. You will have to purchase the two intake manifold to head gaskets, oil filter, oil filter base o-ring, oil vent tube o-ring and heater pipe to timing cover o-ring seperately. Note: The turbo should be checked for sticking/overboost to prevent reoccurance of the head gaskets blowing.
TSB 06-3-8.

May 12th, 2010, 10:45 PM
Does it blow white smoke? EGR coolers go out often if you pull out the EGr valve and it's wet soot* probably your problem

May 12th, 2010, 10:58 PM
no smoke.

also stock, no mods.

May 13th, 2010, 09:46 AM
Suspect list:
1. head gasket
2 EGR cooler - call Bulletproof Diesel-they are the best I have ever dealt with and great parts-bullet proof EGR cooler
3. oil cooler- see #2
4. Head gasket
I have seen several 6.0s , as well as Duramax in the initial stages of head gasket failure give the same symptoms as you describe, without the normal visual clues (smoke and coolant in the oil).
call Todd at Colchin Auto and Diesel...great guy, knows his stuff and will take the time to talk to you. 303-431-5421

May 13th, 2010, 11:06 AM
X2 on the head gasket and egr cooler. We just put a new motor in a 05 because the egr cooler blew up.

May 13th, 2010, 11:11 AM
Our son's '04 F350 PSD had the exact same symptoms about a year ago. It was the EGR cooler. Common problem on that year PSD.