Thermostat Install
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Senior User
Joined: Nov 2013
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Thermostat Install
As from my other thread, some members here said my thermostat is bad based on my ScangaugeII reading. Here's the thread https://www.ford-trucks.com/forums/showthread.php?p=13999012#post13999012 . I have never done this and am trying to figure out if this is something that I could do myself or do I need to go to a shop. What all is involved to change out a thermostat on a 2003 F250 6.0? Will I need to add more coolant? What are some good brands of thermostat?
Elder User
Joined: Dec 2007
Posts: 971
Likes: 1
From: IA MN SD
Get a thermostat from Ford. Too many poor thermostats available from other suppliers.
Drain a couple of gallons of coolant out of the bleeder at the bottom of the radiator. Then the thermostat comes out by loosening a hose clamp and the two housing bolts. Nothing to it. Put everything back together and poor the coolant back in.
Drain a couple of gallons of coolant out of the bleeder at the bottom of the radiator. Then the thermostat comes out by loosening a hose clamp and the two housing bolts. Nothing to it. Put everything back together and poor the coolant back in.
Cargo Master
Joined: Jun 2007
Posts: 2,723
Likes: 5
From: Roseburg, OR
Get a thermostat from Ford. Too many poor thermostats available from other suppliers.
Drain a couple of gallons of coolant out of the bleeder at the bottom of the radiator. Then the thermostat comes out by loosening a hose clamp and the two housing bolts. Nothing to it. Put everything back together and poor the coolant back in.
Drain a couple of gallons of coolant out of the bleeder at the bottom of the radiator. Then the thermostat comes out by loosening a hose clamp and the two housing bolts. Nothing to it. Put everything back together and poor the coolant back in.
I leave the hose attached and use it to pull the t-stat housing up for easier access.
Thread Starter
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Senior User
Joined: Nov 2013
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Great, I won't need a shop then. Whats the torque on the bolts and where is all this located? I just had my coolant flushed last month so could I re-use the coolant if I keep it clean as possible?
Cargo Master
Joined: Jun 2007
Posts: 2,723
Likes: 5
From: Roseburg, OR
17 ft lbs is correct
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Hotshot
Joined: Jul 2005
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From: Middle Tn.
About 5 minutes once you have it down.
Fleet Mechanic
Joined: Sep 2013
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I just did this last night on my 05' I had bolts. Absolutely no need to pull the air filter or housing or cac pipe. Yes it makes for a little easier access but it took longer to drain the coolant than I did to loosen the two bolts and swap the thermostat. I also left the hose on to make it easier to pull it out. 17 ftlbs is what I found in All data as well. A rag stuffed In the opening and a piece is scotch Brite to clean the sealing surface mine wasn't to bad but I like mating surfaces clean.
New User
Joined: Jan 2014
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What do you think about an aftermarket intake for the air filter?
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
I don't. Unless you have some extreme build up of the engine you'll gain nothing with an am filter except emptying you wallet.
Cargo Master
Joined: Oct 2009
Posts: 2,283
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From: missouri
Oem is the best you can get unless your producing big hp. Air filter is easy to get out. Take off your return coolant line. Take off your boot that runs to your turbo right before the ccv. Pull up from the back and it all comes out in one piece. Oh unhook your two sensors before you pull up.