Cooling System Question
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Cooling System Question
On my 99 F350 with 173K miles.....if i run 75 mph at approx 2300 rpm, my truck will start to overheat and when i back it off to 70 mph (2000 rpm) it cools back down. I have already changed and put in the new 203 thermostat, as well as flushed the system. Would this be my waterpump going out or something with the radiator? Thanks
Lead Driver
Joined: Jan 2006
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From: Hartford, WI
I don't know if there is another sensor on the truck. Maybe there is one that the ECM sees and one that the gauge sees. My car does have it that way so maybe the truck does too. If that were the case, get a scanner to check if both sensors read overheat.
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From: Rio Rico, AZ.
Originally Posted by wolftan
On my 99 F350 with 173K miles.....if i run 75 mph at approx 2300 rpm, my truck will start to overheat and when i back it off to 70 mph (2000 rpm) it cools back down. I have already changed and put in the new 203 thermostat, as well as flushed the system. Would this be my waterpump going out or something with the radiator? Thanks
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I guess the easiest and safe way is to go ahead and replace both water pump and radiator.....might as well if i have all that off. Where can i buy the tool needed to get that fan off?
Also, i notice some pretty cheap waterpumps on ebay for $85...wonder if those are any good.
Also, i notice some pretty cheap waterpumps on ebay for $85...wonder if those are any good.
Last edited by wolftan; Jun 5, 2006 at 09:35 AM.
Lead Driver
Joined: Jan 2006
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From: Hartford, WI
I would first go the sensor route to see if it IS really overheating or not. Then use a high pressure wash to clean off all the bugs. That is what I do whenever I see the condenser with too many bugs. Usually I do it once a month or so in the summer.
After that, I would go replacing parts. After all, if you do replace the radiator and the sensor is bad, would that cure the problem?
After that, I would go replacing parts. After all, if you do replace the radiator and the sensor is bad, would that cure the problem?
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Post Fiend
Joined: Apr 2004
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From: Silver Lake Dunes, MI
the sensor is only for the gauge. the computer only looks are oil temp and doesn't care about water temp. i would check as many things as possible before you just replace the water pump and rad you would be at about $500 if you got really good deals on everything.
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From: Northwest OH
Originally Posted by aklim
...Then use a high pressure wash to clean off all the bugs. That is what I do whenever I see the condenser with too many bugs. Usually I do it once a month or so in the summer...