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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van SPONSORED BY:




 
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Old 12-07-2009, 07:18 PM
bjohnson bjohnson is offline
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how to change the thermostat on a ford f-350 diesel 2003???

do anyone know where it is?
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Old 12-07-2009, 07:20 PM
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ya follow the upper rad to hose to the engine at you will find it there.
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Old 12-07-2009, 11:08 PM
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69cj did a nice step by step on how to remove it.

Thermostat Removal Option: (Thank you 69cj)
A) Pull air cleaner assembly.
B) Drain coolant.
C) Remove upper radiator hose.
D) Remove 2 nuts on t-stat housing.
E) Lift and move press sensor bracket to the side. Not a lot of play in it but it will move.
F) Remove 2 more nuts on t-stat housing.
G) Remove housing. It will lift right off of the studs.
H) Reverse procedure to re-install. Use a new O ring (5 bucks at dealer). I used Vaseline to hold the O ring in place.
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Old 01-06-2010, 05:55 PM
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thermostat question

my ford 6.0l is running cool so would it be a thermostat problem it seems as tho its stuck open cuz there is a lil heat from dash but not much just wondering if thats the problem
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Old 01-06-2010, 06:00 PM
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my ford 6.0l is running cool so would it be a thermostat problem it seems as tho its stuck open cuz there is a lil heat from dash but not much just wondering if thats the problem
Could be, did you check the coolant level? Low coolant can cause heater to run cold.
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Old 08-22-2010, 12:45 AM
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Mine was running hot today pulling many long hills. I think it might be sticking closed, gonna change it out in the part store parking lot as I'm on vacation. If they don't have it would it be possible to run without it until I can get one in a different town?
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Old 08-22-2010, 07:41 AM
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Welcome to FTE bjohnson and Ed31 Be sure to check out our Tech Folder located at the top of the forum, enjoy your stay.
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Old 08-22-2010, 08:31 AM
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Quote:
Originally Posted by Ed31 View Post
Mine was running hot today pulling many long hills. I think it might be sticking closed, gonna change it out in the part store parking lot as I'm on vacation. If they don't have it would it be possible to run without it until I can get one in a different town?
Not a good idea but if you have too you have too.
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Old 12-06-2010, 11:14 AM
Jayybird Jayybird is offline
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I am thinking about replacing my T-stat as well. I have about a 20 min commute in the morning to work 55/65 mph. My ECT's are holding at 178. That seems too low. I didn't really notice this back in the summer when its hot. I assume this due to the thermostat sticking. If i run it up to 75 mph and hold it there, ECTs run up to the upper 180s but not much more.

Also, I've noticed my fuel economy has dropped since I started noticing this....would that be a coincidence??...I assume not as the engine should be more efficinet once at operating temp.

Would yall recommend changing the t-stat for this one?

I've read seveal posts and these temps seem to be a little different for everyone. As for now and what i am basing my decision on is the ECTs should be 190-200 and EOT should be 200-210 under normal operating conditions without a load and should have a max of 15 degree difference between the two...anyone disagree with that.

Thanks
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Old 12-06-2010, 12:56 PM
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It's winter and every year about this time my mpg's go down. When the temperature does not get past 50*F during the day you cannot expect good mpg's.
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Old 12-06-2010, 04:02 PM
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Quote:
Originally Posted by Jayybird View Post
I am thinking about replacing my T-stat as well. I have about a 20 min commute in the morning to work 55/65 mph. My ECT's are holding at 178. That seems too low. I didn't really notice this back in the summer when its hot. I assume this due to the thermostat sticking. If i run it up to 75 mph and hold it there, ECTs run up to the upper 180s but not much more.

Also, I've noticed my fuel economy has dropped since I started noticing this....would that be a coincidence??...I assume not as the engine should be more efficinet once at operating temp.

Would yall recommend changing the t-stat for this one?

I've read seveal posts and these temps seem to be a little different for everyone. As for now and what i am basing my decision on is the ECTs should be 190-200 and EOT should be 200-210 under normal operating conditions without a load and should have a max of 15 degree difference between the two...anyone disagree with that.

Thanks

I have the same problem you have, only get to 174/176. Everything I have read says it is the thermostat getting weak/opening early. I am just waiting for a day in the upper 40s to get a chance to change it! may be next spring. it was 16 this morning!!!
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Old 12-06-2010, 04:02 PM
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2003, 60, 60l, change, diesel, drain, f350, ford, installation, powerstroke, radiator, removal, replace, therastat, thermostat

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