Degas bottle running over
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New User
Joined: Dec 2006
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Degas bottle running over
I recently replaced my waterpump and thermastat and now if I start my truck and let it sit and idle it will build pressure and blow my collant out from under the cap.What will cause this ? I have been reading the forum and find that there is two thermostats for this model truck, could it possibly be this or am I looking at a blown head gasket ?
2001 7.3L powerstroke
no water in the oil and none coming out the exaust.
What to do?
2001 7.3L powerstroke
no water in the oil and none coming out the exaust.
What to do?
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
Well i have to say at idle, it probably is a headgasket going bad. Thats a slow RPM to have that much gasses in the system. It could be a very severely cracked injector cup and broken copper o-ring on the tip of the injector body, but even that would cause a situation with alot of fuel in the coolant, and coolant in the fuel (white smoke).
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Bought the pump at Advance and the Thermastat at the ford place and it is the short one. Its 1 3/4" long and from top to bottom the pump measures 2 1/8".
I do have a little white smoke but after the engine warms, no smoke.I think bad glow plugs. Worse on cold mornings until warm then no smoke.
I do have a little white smoke but after the engine warms, no smoke.I think bad glow plugs. Worse on cold mornings until warm then no smoke.
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New User
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It builds as soon as I start it. The water will slowly start to rise and then blow out from under the cap. My temp always shows normal.
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Postmaster
Joined: Sep 2006
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if you didnt have that problem before , id say its somthing fishy about the t-stat, and or waterpump. did you srain the whole system? but it sounds like you have wrong t-stat or like zx250 said its reversed, and wont open against the preassure of the pump, blowing the coolant through the overflow tank.
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Of the next Riffraff East
Joined: Oct 2004
Posts: 8,679
Likes: 2
From: Concord NC
Since you can't put a pump on backwards and the engine is not running backwards, something is blocking the flow, if its not the t-stat, then you need to find that rag you left somewhere. I'm gonna go with a bad or upside down t-stat.
Postmaster
Joined: Sep 2006
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well if you didnt drive it and didnt overheat the motor than you will be fine, just take it apart and check the t-stat, sounds like its stuck in closed position. and make sure its long housing one.
good luck and let us know your findings.
good luck and let us know your findings.
Of the next Riffraff East
Joined: Oct 2004
Posts: 8,679
Likes: 2
From: Concord NC
Originally Posted by PETE'S_7.3PSD
well if you didnt drive it and didnt overheat the motor than you will be fine, just take it apart and check the t-stat, sounds like its stuck in closed position. and make sure its long housing one.
good luck and let us know your findings.
good luck and let us know your findings.
Postmaster
Joined: Sep 2006
Posts: 3,048
Likes: 1
thinking about it, it don't make sense. so it might be a lot of air traped in, causing the gases to back the fluid up?
i would try to disconnec the upper radiator hose off and make sure its full (hose and radiator), before you put it back on.
otherwise it might be a big problem.
i would try to disconnec the upper radiator hose off and make sure its full (hose and radiator), before you put it back on.
otherwise it might be a big problem.
Of the next Riffraff East
Joined: Oct 2004
Posts: 8,679
Likes: 2
From: Concord NC
A lot of air could cause the problem, but shoud correct itself fairly quick. I can't imagine anyway the rad. hose could have gotten crossed, maybe the heater hoses? Just grabbing for straws now.