6.0L Power Stroke Engine and DrivetrainDiscussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.
Problems:
1. Does not engage 4WD on-the-fly, it must be engage manually.
2. When first turned on in the morning the truck reaches normal temperature, but the heater will not work, and the degas bottle bubbles.
3. The heater starts working when I start driving the truck. When I stop at a red light the heater stops blowing hot air until I start picking up speed.
I have a few thoughts of what could be the cause of these problems, but I do not want to stear anyone in any particular direction. I would like to see what you all think about this issues!
The heater and 4wd system is linked to a bad vacuum pump and the bad head gasket. You are having symptoms like the lack of hot air and it picking up after you increase the pump speed. What's happening inside the motor is the bad gasket is letting the coolant escape also a pressure drop causing the heater core to effectively be dry no coolant this is when you feel the heater lose hot air. When you see the bubbles it is you turbo pushing air past the gasket but it also could be combustion gasses. any way you go about it the motor needs help I am sorry for your loss
GI, I know you busted your hump on that truck! Start w/ test kit/NAPA for combustion gas contamination in coolant? Are you loosing/ puking coolant? Tee a gauge inline w/ degas bottle and post the pressure/ see if it rises w/rpm and load IF no, check for bad impeller/ water pump going south? Could this be pump cavitation issue? Look on the heater hose bundle and find the valve/solenoid and see if the grey vac line is present? Check operation of the solenoid/valve. You may have a cracked vac line... Does the vac pump run continuously? Junkers 88 has some good info on where to look and can show you some areas of interest and where to look /4wd vac hose leak. Hope you get it sorted out. Just throwing some ideas your way. Good luck.
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03 F-250 CC LB XLT 3:73 rear/ almost stock/ early build/ 70,000 miles...03 F-250 ext cab Lariat Fx4 SB 3:73's /stock/170,000 all original injectors...FICM by Ed @FICM.COM / ScanGuage 2 monitoring the vitals...
I am glad you remembered 03 powerstroke! I love this truck, but I will be filling for divorce soon because it is a money pit! The headgaskets were just done about a month ago with ARP studs and OEM headgaskets. The bubbling with the degas bottle happens only in the morning during the first start, and does not happen again for the rest of the day! When I get to work and check the degas bottle there are no bubbles! The EGR valve cooler has been bypassed, and the temprature does not go above the midline. Thanks for the advice on the hubs, I will take them out clean them and relube them. They are truly hard to turn by hand. I believe I will aldo have to buy a vaccuum pump. I placed my hand on the opening of the degas bottle while myu daughter stepped on the gas, and there was no difference in pressure that I could tell. I am going to get a pressure gauge and check again. I really appreciate all the advice. This could not be happening at a worst time. I am deploying in a couple of more months, and I do not want to leave my truck in this condition.
The heater and 4wd system is linked to a bad vacuum pump and the bad head gasket. You are having symptoms like the lack of hot air and it picking up after you increase the pump speed. What's happening inside the motor is the bad gasket is letting the coolant escape also a pressure drop causing the heater core to effectively be dry no coolant this is when you feel the heater lose hot air. When you see the bubbles it is you turbo pushing air past the gasket but it also could be combustion gasses. any way you go about it the motor needs help I am sorry for your loss
The vacuum pump is electric. Engine speed has no effect on its operation.
I really should of explained more in depth you are most correct about the vacuum pump it does not have any tie to the engine. But the lack of vacuum could most definitely effect the operation of both the actuation of the hubs on a 4wd system an the heater and a/c. When I was explaining the symptom of the lack of heat I was not thorough enough. When I described the term of pump speed I was referring to water pump speed I should have stated that clearly.
Last edited by generalmotor; 02-07-2013 at 03:59 PM.
Reason: i am a eastern europe village idiot
UPDATE!!!!!!!!!!!!!!!!!!!!!
Took out the water pump and it is working fine. It was replaced in May of last year. The truck is no longer puking antifreeze or having any bubbles in the degas bottle (do not ask me what happened because I do not know). The only symptom the truck has right now is the heater working only when I am driving, and not while while at a stop light or on my driveway!! I ordered a vacuum pump and will arrive tomorrow (to address the issue with the locking hubs) I will take the hubs out, clean and lubricate them. I will post the results of that later.
I really should of explained more in depth you are most correct about the vacuum pump it does not have any tie to the engine. But the lack of vacuum could most definitely effect the operation of both the actuation of the hubs on a 4wd system an the heater and a/c. When I was explaining the symptom of the lack of heat I was not thorough enough. When I described the term of pump speed I was referring to water pump speed I should have stated that clearly.
I went back and re-read your first post and I now understand what you were saying. I like your reason for editing the last post. I often joke that I'm an American because my ancestors were ejected from the better parts of civilized Europe.
Bought a new electric vacuum pump, removed the front hubs and re-packed them with grease. The 4x4 is working like a charm. I really love this truck and it makes me feel greta that has so many brand new parts and all of them are working, but I will sell it to the first one with 25K. I will be deploying shortly and do not want to leave it sitting tjhe for that long. It is time to move on. (210) 863-6294
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