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Old 02-03-2012, 10:05 PM
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Thermostat Replacement

I know there are a couple write ups on changing the thermostat on our trucks but I just wanted to throw some pictures of the procedure and how easy it really is, also I might have done some things differently but it all worked out great.

First is the drain pettock on the bottom of the radiator, use a 3/4" wrench/socket and drain coolant into container (I drained about 2.5 gallons which was enough)

Picture of all the crap in the way of getting to the thermostat

Next take 7mm socket to the upper rad hose (or flathead screwdriver), I used a bungie cord to keep it out of the way

Much better view and room to work around with that out of the way

Also I took one of the lines going to the degas bottle off because it was in the way, you could get away with leaving it on

Same pic as earlier but with both hoses out of the way there is enough room to get a swivel socket with a very long extension, or two medium length extensions, no pic of the socket but with the extension and swivel I did not need to remove the air intake at all (10mm socket for thermostat housing bolts)

And wala it is out, no removing the air filter or anything

Thermostat out, very dirty

And here is the new one, Part number RT-1169. It was cheaper for me to get this at my local dealer and they also had it in stock so I picked it up the next day, no shipping. Also came with new oring, the old one had pitting and looked pretty crappy

The most time consuming process was actually letting the coolant drain, overall probably took 45 minutes and this was with the draining and me running back and forth to the toolbox and so on. Overall easy project and very important, before coolant temp would not get over 170 degrees at all since its the winter. Now Im seeing 190 consistently, oil temp 196
Also along the lines of putting what you drained back in or buying new stuff. I still have ford gold in there and what I drained I put back in. I know its probably not the best but no way I was going to go out and buy more ford gold as I am going to do a chemical flush at some point in the future. As far as I know this is the second thing to go wrong with my truck, the first being the serpentine belt. 200,000 miles with ford gold, factory everything and still going

Last edited by dieselburner21; 02-03-2012 at 10:08 PM.
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Old 02-04-2012, 08:40 AM

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Yours is lil differnt than mine. 13 mm housing boots. Thought I could just use a swivel extension. Not working. On my way to buy more toys. I mean tools.
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Old 02-04-2012, 02:34 PM
Compression Ignition Addict

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Guess they changed in 05-07? Mines and 06
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