90 F150 Thermostat replacement
02-11-2009, 02:24 AM
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90 F150 Thermostat replacement
I Just got a new theromstat for my 90 f150 4x4 5.0lt, and i can't find any pictures online saying where its located... anyone know a good how too ?
02-11-2009, 08:32 AM
#3
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Follow the upper hose back toward the engine. Where it connects is the t-stat housing. Remember the spring of the t-stat goes into the intake not into the housing. If there is a little rivet thing in the t-stat, that is a bleed hole it goes up. Hope I haven't confused you.
02-11-2009, 06:38 PM
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Follow the upper hose back toward the engine. Where it connects is the t-stat housing. Remember the spring of the t-stat goes into the intake not into the housing. If there is a little rivet thing in the t-stat, that is a bleed hole it goes up. Hope I haven't confused you.
Yeah, this is my 1st truck, and 1st car i've replaced one of these things... so i still have no idea where you describe... anyone got a picture and they could circle it or something?
02-11-2009, 06:47 PM
#5
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If you're standing in front of the truck with the hood up, you'll see a large hose coming off the top of the radiator and heading toward the engine. Where that hose connects at the engine is the thermostat housing.
You'll need to take the hose loose from the housing, and then remove the housing. The thermostat is sitting right under there. Make sure to get the stock value - 190 or 195 degrees. You might also need to buy a flex drive or knuckle for your rachet - it's in a tricky spot to get to.
You're gonna lose some coolant during this process - be prepared to top off the radiator with a 50/50 mix of coolant and water when you're done.
You'll need to take the hose loose from the housing, and then remove the housing. The thermostat is sitting right under there. Make sure to get the stock value - 190 or 195 degrees. You might also need to buy a flex drive or knuckle for your rachet - it's in a tricky spot to get to.
You're gonna lose some coolant during this process - be prepared to top off the radiator with a 50/50 mix of coolant and water when you're done.
02-11-2009, 06:53 PM
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This is a pic of where it mounts, with the stat removed. The bottom bolt is the tricky one.
To give you some direction, you're looking at the tensioner pulley on the left, a/c compressor on the right, and distributor right behind/right of the mounting location.
One other thing - replace the gasket with a new one unless you'd like to do this twice...
To give you some direction, you're looking at the tensioner pulley on the left, a/c compressor on the right, and distributor right behind/right of the mounting location.
One other thing - replace the gasket with a new one unless you'd like to do this twice...
02-11-2009, 08:43 PM
#7
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Nice PIC Aliens, and to pull the t-stat and clean up the gasket area in 5 minutes post time is awesome. 
What the dedicated members will do for another. You are my idol! All BS aside, have to admire this person for comming forth and asking for help. Wish all would be so straight forward and just ask!
What the dedicated members will do for another. You are my idol! All BS aside, have to admire this person for comming forth and asking for help. Wish all would be so straight forward and just ask!
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02-12-2009, 09:18 PM
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NICE I found the area i need to get to (thanks large in part to that pic...) So tomorrow when i'm working on the truck (Taking a part the rear diff also, hoping the gears are causing my cars issue's and not the tranny) I'll put in a stock 19X thermo in there then !
Thanks again alien
Thanks again alien
02-12-2009, 09:26 PM
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To make it easier I had a set of shorty wrenches. I believe its a 1/2" on the housing. For the other side a swivel socket and 1/2" socket. Don't use a cheap one I broke one doing this job, and for the gasket and placement, make sure its all good and solid before putting it on/in. I had to do this job 5 F###### times because of bad thermostats bad placement and bad gaskets. The 5th time was very careful slow and used a lot of gasket sealer.