85 F150 Overheating Problem
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85 F150 Overheating Problem
There She Blows 
It has a 302 in it. The truck sat for about 2 1/2 years. I gave it a tune up and a new timing gear and chain put in it. Took it out for a drive and it started to over heat, so i brought it home replaced the water pump, thermastat, hose's and had the radiatore flushed. We'll it still over heated. The last thing i did was get a new fan cluch and just got back from triing it out, still no go.
If anyone has any other ideas your input would be greatly appreciated. THANKS in advanced.
Lead Driver
Joined: May 2000
Posts: 9,236
Likes: 12
From: Senoia, GA
85 F150 Overheating Problem
If you don't mind try searching next time man...i answered this question like 2 weeks ago!
To me it sounds like your water pump could be the wrong one maybe...look in your radiator when the truck is running and if the coolant is barely moving then change your water pump to a later model. Also, the thermostat could be backwards....the spring should be facing the block!
Try this http://fordtrucks.com/forums/showthr...hreadid=137859
OR
http://fordtrucks.com/forums/showthr...52Boverheating
OR
http://fordtrucks.com/forums/showthr...52Boverheating
Hope this helps!
-Jason-
To me it sounds like your water pump could be the wrong one maybe...look in your radiator when the truck is running and if the coolant is barely moving then change your water pump to a later model. Also, the thermostat could be backwards....the spring should be facing the block!
Try this http://fordtrucks.com/forums/showthr...hreadid=137859
OR
http://fordtrucks.com/forums/showthr...52Boverheating
OR
http://fordtrucks.com/forums/showthr...52Boverheating
Hope this helps!
-Jason-
Elder User
Joined: Oct 2002
Posts: 513
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From: Lincoln NE
85 F150 Overheating Problem
If the thermostat is in backwards, won't the motor run cooler? Wouldn't it be open all the time? I put mine in backwards (cause I'm a bonehead)
and it ran below normal. I drove it for about a hundred miles this way. So when I got to where I was going, I checked it and sure enough, I had it backwards. Turned it around and it went back to normal. Just my 'sperience (as DW would say).
and it ran below normal. I drove it for about a hundred miles this way. So when I got to where I was going, I checked it and sure enough, I had it backwards. Turned it around and it went back to normal. Just my 'sperience (as DW would say).
Lead Driver
Joined: May 2000
Posts: 9,236
Likes: 12
From: Senoia, GA
85 F150 Overheating Problem
another thing...do you have a radiator shroud? I accidently broke mine and have to find a good replacement and I will sometimes have cooling problems
-Jason-
-Jason-
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Lead Driver
Joined: May 2000
Posts: 9,236
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From: Senoia, GA
85 F150 Overheating Problem
Originally posted by nzabka
If the thermostat is in backwards, won't the motor run cooler? Wouldn't it be open all the time?
If the thermostat is in backwards, won't the motor run cooler? Wouldn't it be open all the time?
I would run without one for a lil bit just to make sure it isn't your problem.
-Jason-
Last edited by fishmanndotcom; Aug 13, 2003 at 01:00 PM.
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85 F150 Overheating Problem
I have been running it without the t-stat and yes the shroud is on. It will run normal for about 10-15 mins then it just start to get real hot and over heats.
Fishmanndotcom are you saying try a pump off of a new modle truck. If not the part number is the same for anything older back to 75
Fishmanndotcom are you saying try a pump off of a new modle truck. If not the part number is the same for anything older back to 75
Lead Driver
Joined: May 2000
Posts: 9,236
Likes: 12
From: Senoia, GA
85 F150 Overheating Problem
If the engine came with a serpantine belt setup and your running V belts the water pump will spin backwards and not pump. If this is the case change the water pump for an early model one.
-Jason-
-Jason-
Senior User
Joined: Mar 2003
Posts: 421
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From: Canyon Lake Texas
85 F150 Overheating Problem
Was it stored without anti-freeze to where you may have a rust-caked block? I've picked up a 289 that drained pure water out of it when I flipped it over on the engine stand, and it sat for 3 years, so I have that concern for it as well. I heard it run-rigged up on a trailer with a radiator, but I didn;t let it run long enough to get really warmed up (the carb was shot, and we were having to bottle feed it). I plan on flushing it with a chemical, but I don't want to tear apart a good motor just to get all the freeze plugs out to blast out the passages. <p> I built a 352 once with all the best, and precision machining, and we never could get that to run cool. I agree with "check your timing", retarded ignition will make 'em run hot (and sluggish). I'd try advacing it till it pings, then back it off a tad. Could your timing chain be off a tooth? You mentioned that you replaced it.
Senior User
Joined: Oct 2001
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From: Crosby TX
85 F150 Overheating Problem
You may need to have your radiator "rodded out".
After sitting for that amount of time, the lower cooling tubes may be clogged with sediment.
Most radiator shops can remove the tanks and clean out the core tubes.
After sitting for that amount of time, the lower cooling tubes may be clogged with sediment.
Most radiator shops can remove the tanks and clean out the core tubes.
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