coolant pressure
Thread Starter
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Tuned
Joined: Apr 2006
Posts: 331
Likes: 4
From: grorgetown,in
coolant pressure
im messing with a 01 7.3 with 200,000 miles. the coolant tank keeps rising on fluid at idle. there is no diesel fuel in coolant. doesent smoke any. changed thermostat and didnt help. temp guage goes to normal but top rad hose and coolant in tank is cold, and the heat is cold. took water pump off thinking maybe impeller come loose. no luck. im lost at this point, if it was head gasket i would think coolant should still flow. im wondering if coolant has to flow through oil cooler to make its flow. just a thought. any help would be great. im sure im leaving somethig out. any questions just ask and ill answer. thanks.
Lead Driver
Joined: Jun 2004
Posts: 6,362
Likes: 593
From: Amarillo, TEXAS!
Normal on the dash gauge doesn't really mean much. What temperature thermostat did you install, and are you sure it was the right length stem? Do you have any way to see what the engine oil temperature actually is, like Torque Pro or AE?
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
Rising? Are you aware that the "cold" line on the degas is a farce? After the truck has been run to full temp, the fluid settles about an inch or two below the "cold" line. Don't top off and see how this behaves.
Do you have anything that looks like soot in the degas?
Do you have anything that looks like soot in the degas?
Go Bills !
Joined: Jan 2008
Posts: 2,778
Likes: 65
From: Buffalo, NY
Air in the system? Sometimes i will put a small hole in the t-stat (or snip in a V with the cutters) to help with air trap. And as said i have had new t-stats bad out of the the box also. All cars. Many times..
Thread Starter
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Tuned
Joined: Apr 2006
Posts: 331
Likes: 4
From: grorgetown,in
i do have a way to check oil temp. when i say rising i mean it comes from the min mark and will come out the top if i let it run long enough. ill put thermostat in a can and heat it up and see if it opens. its really weird. guy said it done it like 2 months ago just one time then was good. now all the sudden it doing bit again. rising in the tank. i always get the trucks that make you scratch your head.no suet in the tank. it is actually pretty clean.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
Don't top it off the next time it spills. Sure, carry some coolant in a jug... but watch what it does if you don't top it off.
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Logistics Pro
Joined: Jun 2005
Posts: 4,243
Likes: 16
From: AZ
Did you take out and put in a long-stem thermostat like this,
or was it short-stem thermostat? Just curious...
or was it short-stem thermostat? Just curious...
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Lead Driver
Joined: Jun 2004
Posts: 6,362
Likes: 593
From: Amarillo, TEXAS!
Take a look at this post for why you should pretty much ignore the Min and Max marks on the bottle.
https://www.ford-trucks.com/forums/1...l#post14189238
https://www.ford-trucks.com/forums/1...l#post14189238
Thread Starter
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Tuned
Joined: Apr 2006
Posts: 331
Likes: 4
From: grorgetown,in
im not sure what happened, but i put truck back together, started it up and let it warm up. oil temp got to about 200 and water was saying 300. i knew it wasnt that hot, must be air around the sensor not fluid cause i still had no heat. i shut truck off, loosened cap and it burped a few times then the tank went empty. i put coolant back in it started truck and i have heat and everything is good. i just dont get how it got air in it in the first place. guess ill just have to try it and see how it goes.
Posting Guru
Joined: May 2013
Posts: 1,199
Likes: 2
From: Oklahoma
Take a look at this post for why you should pretty much ignore the Min and Max marks on the bottle.
https://www.ford-trucks.com/forums/1...l#post14189238
https://www.ford-trucks.com/forums/1...l#post14189238
I can't belive one of my treads has been offered to help others...
Senior User
Joined: Jun 2012
Posts: 256
Likes: 0
Take a look at this post for why you should pretty much ignore the Min and Max marks on the bottle.
https://www.ford-trucks.com/forums/1...l#post14189238
https://www.ford-trucks.com/forums/1...l#post14189238
Lead Driver
Joined: Jun 2004
Posts: 6,362
Likes: 593
From: Amarillo, TEXAS!
im not sure what happened, but i put truck back together, started it up and let it warm up. oil temp got to about 200 and water was saying 300. i knew it wasnt that hot, must be air around the sensor not fluid cause i still had no heat. i shut truck off, loosened cap and it burped a few times then the tank went empty. i put coolant back in it started truck and i have heat and everything is good. i just dont get how it got air in it in the first place. guess ill just have to try it and see how it goes.