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Discussion Starter #1 (Edited)
I was wanting to get some opinions on this. When sitting at an idle the fan will not cool down the engine temp. It actually starts to raise when the fan comes on, as soon as I give it a little throttle the temp will start to drop. When riding around it will act normal. The fan will cut on at 204 and start cooling it down. I am thinking maybe water pump impeller? I have been experiencing some vapor locking as well so im sure a new fuel pump is in order but im not sure if that could the source of the problem. What does PRC say?
 

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I was wanting to get some opinions on this. When sitting at an idle the fan will not cool down the engine temp. It actually starts to raise, as soon as I give it a little throttle the temp will start to drop. When riding around it will act normal. The fan will cut on at 204 and start cooling it down. I am thinking maybe water pump impeller? I have been experiencing some vapor locking as well so im sure a new fuel pump is in order but im not sure if that could the source of the problem. What does PRC say?
Langston, low fuel pressure will always make it run lean/hotter. If your fan speed is good and the radiator is clear of mud and debris, I would make sure that the coolant is good and full and all air is bled out of the system. A radiator cap not holding 13 psi will also allow it to run hotter. The impeller is easy to check but unless you have really scorched it, I doubt it is your problem.
 

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I would lean more to some air needing purged, if so let all possible out at the the air vent located by the thermostat and then pull it forward up on a steep bank and run the throttle up to push the air forward up to the radiator and vent out the radiator cap (when cool of course). If you have heater make certain to set it to heat to allow the water to flow through it. I have also seen where some mud in the fins restricts air flow and causes heat up at idle ?? Hope this helps.
 

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Discussion Starter #4
Langston, low fuel pressure will always make it run lean/hotter. If your fan speed is good, I would make sure that the coolant is good and full and all air is bled out of the system. A radiator cap not holding 13 psi will also allow it to run hotter. The impeller is easy to check but unless you have really scorched it, I doubt it is your problem.
I just bought a fuel pressure tester yesterday. The next time im at the lease I plan on checking the pressure. This past weekend was the first time it happened. I cranked it up in the morning to warm up and it and it overheated spraying coolant out of the tube at the top of the radiator just below the cap. I let it cool down and put some water back in it but it kept getting hot at idle for the rest of the weekend
 

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"spraying coolant out of the tube at the top of the radiator just below the cap."

The hose to the recovery bottle is obviously not there which means that the cooling system is open and taking on lots of air. Need that back on and then fill her up and open the air bleed screw.
 

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Discussion Starter #6
Thanks guys, I'm goin to check that out. I didn't even think about air being in the system. I will post up what I find.
 

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That's what it was. I just pulled the front tiresup on railer and opened the radiator cap, started it up and when it got hot enough to open the t-stat a bunch of bubbles started coming up. Toped it off with coolant and didn't have anymore problems! Thanks again guys
 

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If the hose to the recovery bottle Kris mentioned is missing, you're problem will eventually reoccur. The hose goes from the top of the radiator fill neck to the bottom of the recovery bottle (1/4" ID).
 

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Discussion Starter #9
Yea I had forgotten about that, I remember seeing it coming out of the top of the radiator but I need to check to see if it has pulled loose from the recovery bottle. Thanks!
 
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