Overheat Issue??
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Freshman User
Joined: Jun 2006
Posts: 35
Likes: 0
From: JMU/Richmond
Overheat Issue??
Hey guys, got a question for you.. Going home this weekend for Easter, which is an opportunity to work on my truck. The issue at hand is when I am driving the truck, my temp gauge reads all normal levels, however as I come to a stop the needle progressively rises up and up towards the "red" zone. Truck still runs but I'm worried about the potential damage it may be causing.. I'm not sure the last time the coolant was changed/flushed so that's something I plan on doing..
What do you guys think?
Thanks,
Cabell
1992 F150
2wd 300 I6
177,000 mi
31x10.5xR15 BFG AT's
BTW: I also plan on cleaning the EGR valve and throttle body... Plus some potential body work.. Any tips on that would be greatly appreciated.
What do you guys think?
Thanks,
Cabell
1992 F150
2wd 300 I6
177,000 mi
31x10.5xR15 BFG AT's
BTW: I also plan on cleaning the EGR valve and throttle body... Plus some potential body work.. Any tips on that would be greatly appreciated.
Laughing Gas
Joined: Oct 2005
Posts: 1,226
Likes: 42
From: The OC
Drain and flush the system, flush and backflush the heater core, hoses and block, replace the thermostat AND the radiator. While the radiator is out of the way, I would replace the water pump too. If the hoses look old and/or cracked, replace them. Follow directions for the thermostat and pump and lightly coat both sides of the gaskets with silicone. Fill with new coolant and you will be good to go with a new cooling system. Check for codes to make sure your ECT sensor is good. If you have all of your parts, this will only take an hour or 2. I had the same problem, did mine 2 months ago and no more issues.
Cargo Master
Joined: Jan 2004
Posts: 3,118
Likes: 149
From: South Dakota
That part sounds like the fan behind your radiator is not pulling the air through the radiator properly. I would take the steps to correct this.
Posting Guru
Joined: Sep 2008
Posts: 1,123
Likes: 4
From: Baltimore
Ditto on the fan. When you're driving, 'ram air' is cooling the system. When stopped, fan isn't picking up the slack. Either replace the fan clutch, or upgrade to a 'flex-fan'. (One good way to check a clutch fan, other than the leak from the clutch, is to when the engine is off, hold the blades on each side and rock the blades back to front alternately. Any play shows the clutch is failing, and not gripping the shaft.)
Clutch fans have a thermocouple that engages the fan to the shaft when the temp goes up, and releases when the ram-air cools it off.
Hope this helps. Let us know.
Clutch fans have a thermocouple that engages the fan to the shaft when the temp goes up, and releases when the ram-air cools it off.
Hope this helps. Let us know.
Senior User
Joined: Sep 2006
Posts: 137
Likes: 1
I'm thinking it's the fan clutch as well. My issue was the reverse, the fan was engaged all the time and wouldn't disengage when I was driving.
I would start there because it's pretty easy to replace and the part is like $65 at advance auto parts.
I would start there because it's pretty easy to replace and the part is like $65 at advance auto parts.
Posting Guru
Joined: Sep 2008
Posts: 1,123
Likes: 4
From: Baltimore
Also on the fan issue, when you replace the clutch, run the engine at idle till it warms up. Then, reach up and rev the engine a few times. The fan will disengage for a few minutes, then re-engage. You'll notice the sound of the fan and the increased pull thru the radiator.
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Freshman User
Joined: Jun 2006
Posts: 35
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From: JMU/Richmond
Awesome!! Thank you very much guys. I'll be going home Friday so I'll be addressing this problem first thing Saturday..(but got to get a little turkey hunting in first.. 
) I'll keep yall updated and consult yall for any further questions.
Cabell
) I'll keep yall updated and consult yall for any further questions.Cabell
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Tuned
Joined: Jan 2006
Posts: 263
Likes: 6
From: Blue Ball, PA
As 70torino429 and HrdDrv have stated, very easy and accessible fix. Remove the belt, remove the 4 water pump pulley bolts holding the fan clutch assembly to the water pump, remove the 5 bolts holding the fan blades to the clutch, pitch the old clutch, install the fan blades to the new clutch, install the fan clutch assembly to the water pump and pulley, reinstall the belt, job finished and you're ready to go!
Thread Starter
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Freshman User
Joined: Jun 2006
Posts: 35
Likes: 0
From: JMU/Richmond
Awesome. Really appreciate this guys, I think I'll go ahead and flush and replace the coolant as well.. Kinda excited, I hate when stuff breaks on my truck but at the same time I LOVE fixing/working on my truck.. Should be a good little project for the Easter weekend!
Posting Guru
Joined: Sep 2008
Posts: 1,123
Likes: 4
From: Baltimore
Carb cleaner into the intake will do alot of good. Also when the engine is idling, just don't stall it. Have the idle up when it's done. Remove the air filter and either replace it with a new one, or blow it out real good. Keep in touch here, and let us know.