For those of you with electric fans and a temperature controller
Legend
Joined: Jul 2007
Posts: 7,843
Likes: 13
From: DFW, Texas
RE: For those of you with electric fans and a temperature controller
I'm notfamiliar with that controller, but it has adjustable temps on it.If you think the engine's running hot, start up the truck after its cooled completely downand put your hand on the top radiator hose. As soon as the Tstat opens, the hose will get hot and if the fans don't kick on in a couple of seconds, turn down the controller temp until they kick on.
What temp Tstat are you using? Stock is 195* so 210* isn't that far off. Ifthe fans are set for lower and they can actually cool that quickly, the tstat might shut then reopen again when the block heats the coolant up, though they'd probably have to be pretty powerful to do that. Idle is the hardest to keep temps cool due to no ambient air (ram air) running through the rad's fins.
If you have a gap between the fan shroud and the radiator fill it so the fan is forced to pull thru the rad, not around the gaps in the shroud.
Also, make sure you burp the coolant system throughly. I usually drive the truck up on ramps to make sure the radiator cap is at the highest point on the system, and I run the heater to make sure the heater core is burped as well. It can burp for up to 20 min sometimes, and I usually always have to add a little after a few trips around.
I've heard that if your Antifreeze mix is too high, your system can have trouble shedding heat as the Ethylene Glycol won't give up the heat as readily as water. 50-70% EG to water is thestandard deviation according to the manual.
Finally, research the CFM the fans pull just to be sure. I would think 3500CFM is probably the lowest you'd want unless you tow, then probably around 4500 or so.
What temp Tstat are you using? Stock is 195* so 210* isn't that far off. Ifthe fans are set for lower and they can actually cool that quickly, the tstat might shut then reopen again when the block heats the coolant up, though they'd probably have to be pretty powerful to do that. Idle is the hardest to keep temps cool due to no ambient air (ram air) running through the rad's fins.
If you have a gap between the fan shroud and the radiator fill it so the fan is forced to pull thru the rad, not around the gaps in the shroud.
Also, make sure you burp the coolant system throughly. I usually drive the truck up on ramps to make sure the radiator cap is at the highest point on the system, and I run the heater to make sure the heater core is burped as well. It can burp for up to 20 min sometimes, and I usually always have to add a little after a few trips around.
I've heard that if your Antifreeze mix is too high, your system can have trouble shedding heat as the Ethylene Glycol won't give up the heat as readily as water. 50-70% EG to water is thestandard deviation according to the manual.
Finally, research the CFM the fans pull just to be sure. I would think 3500CFM is probably the lowest you'd want unless you tow, then probably around 4500 or so.
