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Over Heating issues, please help!

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Old 08-14-2013, 04:32 PM   #1
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Over Heating issues, please help!

Hey so I just got into the yota seen last night when I bought an 85 pick-up with a 350chev in it. Now I took it for a test ride and everything was fine but I guess not really long enough to notice the temps. Last night on the way home the truck over heated, and bolied over. It has 4.88s with 36s with a turbo 400 3speed, so I was doing about 90kmh at 3k rpm. The truck has the rad relocated on the back and has a 16" electric fan pulling. Today I pulled the thermostat, added a 16" fan between the cab and rad to push, and also put a mechanical fan back on the motor to help cool it down up front. I drained the coolant and put brand new coolant in and made sure theres no air in the lines at all.. All of this did nothing really, take a few extra minutes to get up to 220 but gets there in about 10-15m.

I dont know where to go from here, only thing I can think of now is water pump or head gasket. But theres no white smoke at all, and no coolant in the oil or vise versa. The trucks runs great, idles perfect. (after some carb tinkering)

Please help me out guys.





Last edited by tjfudge; 08-14-2013 at 04:34 PM.
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Old 08-14-2013, 04:36 PM   #2
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Is the radiator big enough? Are the fins clean or is it packed with mud?
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Old 08-14-2013, 04:39 PM   #3
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rad is spotless. and I don't know, its out of a ford Taurus. It's a decent size. The old owner said he never had heating issues but thats bull.
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Old 08-14-2013, 04:49 PM   #4
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Was the coolant that you drained dirty? How did it look? You could do a compression and leak down test if you think it could be a head gasket
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Old 08-14-2013, 05:03 PM   #5
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coolant was a bit dirty for a bit, but good for the most part. alot of air came out when I flushed it so I thought it was just air locked but it didnt help either. I dont think its a hg cuz like i said no smoke at all
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Old 08-14-2013, 05:10 PM   #6
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Have you ran the engine with the rad cap off? To get all of the air out. Is the radiator far enough away from the cab to get enough air flow
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Old 08-14-2013, 05:24 PM   #7
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ya ran it for a while with the cap off with the heater blasting. and filled all the lines. and its about 4 or 5" away but there is a 16" fan there pushing air through and another one on the other side pulling so should be a air issue
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Old 08-14-2013, 05:34 PM   #8
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Maybe someone can chime in that has experience with rear mount radiators. My guess would be the water pump though if your getting good air flow
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Old 08-14-2013, 09:17 PM   #9
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i dont know what a ford taurus radiator looks like but just from the sounds of it a bigger unit could be in order.
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Old 08-14-2013, 11:29 PM   #10
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ya im going to replace the waterpump and put a bigger rad on
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