removed the cooling fan for the winter

[Smileyshaun]

In the winter months put a piece of cardboard or other material to block the radiator . had to do it every winter with my diesel trucks or it would take over an hour of driving to get the motor warm and the heat blowing . Much quicker than removing the fan and accomplishes the same affect

 

[CrazyDrei]

As some of you know the 2500 model trucks come with a heavier duty cooling system and can take FOREVER to warm up in the cooler months, so last week I read up on removing the fan/clutch assembly on our 2003 Yukon 2500. After a lot of reading to support removal I decided to take it off on Saturday before we set out for many hours of shopping. All I can say is I should have done this last year as well, even with the typical parking lot traffic and letting it idle while airing up all 4 tires to proper pressures (had new tires put on the day before and Big O only put 40 pounds in load range E tires, doh!) the temps were spot on, and the heat was so much more consistent. I tossed the fan in the back in case we need it at some point but doubt we will until it's warm enough to tow the boat in 5 months. Throttle response was much better and saw 1 mpg better even before calibrating for the taller tires. Also have a complete OEM dual electric fan setup including relays going on in the spring.

Jeep-N-montero,

I noticed exactly the same gains in MPG and throttle response when I removed the clutch fan and put in the dual electric fans. Also as long as you can keep the truck moving at least 15-mph the airflow across the radiator will keep it plenty cool when outside temperature is below 50degrees, your AC is not running and you are not towing anything.

Also, when you wire in the electric fans run a manual on/off switch, it will come in handy when you least expect it. And if you are running factory relays, you should be able to fine tune the temps and fan speeds if you have a Diablo intune or a flashpaq f5.

Good luck!

 

[Deleted member 9101]

Also, when you wire in the electric fans run a manual on/off switch, it will come in handy when you least expect it.

Yeah...I suggested that too... he didn't seem to seem to happy about it...lol.

 

[jeep-N-montero]

Now this is some interesting info, quoted from another page

"No one talks about this but e fans help in cold weather too. The viscous clutch fan freezes on and will overcool the engine at idle to the point the thermostat closes and the truck starts to cool off. Once I did e fans that has never happend again. On the cj2 digital dual climate control trucks your a/c clutch is locked out below freezing so your fans will only run on temperature. Oddly my friends cj3 equipped manual climate truck does not do this and since the a/c clutch cycle the e fans will kick on and off based on system pressure no matter the temp outside... annoying but I can't fix that. Just another reason I won't buy a truck without digital climate control lol."

 

[CodyY]

This hurts my brain.

If the engine isn't warming up properly it needs a thermostat. You said you replaced it, but what temperature did you replace it with?

1mpg is not worth the effort. Especially when you're talking about 1mpg "in town shopping" . We see 100 days over 100 here annually. The thought of pulling a mechanical fan from a 3/4 ton truck is beyond my comprehension. Worrying about 1mpg city in a tow rig tells me things: 1, buy another car for farting around town and use the tool as intended. 2, swapping to electric fans is great, especially if you add an overriding switch for when you know it's going to need additional cooling, but removing it altogether means something isn't right.

If you see that much cold weather why not just run a block heater? I've never needed one, but isn't that what they're for? Or maybe remote start?

Even on single digit days my 2008 5.3 truck was cranking (some) heat within 5 minutes or less.

Sent from my SM-G955U using Tapatalk

 

[CrazyDrei]

This hurts my brain.

Mine too. But that is the expected norm from a theoretical arm chair philosopher with little to no hands on experience with thermostats, engine cooling or towing.

Yeah...I suggested that too... he didn't seem to seem to happy about it...lol.

Jeep-N-Montero seems like a fun dude, he will end up running an on/off switch, might not admit it though.

Even on single digit days my 2008 5.3 truck was cranking (some) heat within 5 minutes or less.

You have just said the worst possible thing in this thread, how dare you compare our inferior, weak and underpowered 5.3 to the superior in all ways 2500 6.0 the OP is trying to cool by removing the clutch fan, LOL.

All jokes aside, removing my clutch fan, replacing the 180degree thermostat with a new one and installing factory dual efans with a flex-a-lite adjustable variable speed fan controller set at 170 degrees, with a wired on off switch for deep water crossings increased my MPG, decreased my engine and transmission temperature and increased the throttle response. I spent a total of $250 on the efans and controller without messing with factory relays and attempting to tie them into the ECU.

 

[CodyY]

All jokes aside, removing my clutch fan, replacing the 180degree thermostat with a new one and installing factory dual efans with a flex-a-lite adjustable variable speed fan controller set at 170 degrees, with a wired on off switch for deep water crossings increased my MPG, decreased my engine and transmission temperature and increased the throttle response. I spent a total of $250 on the efans and controller without messing with factory relays and attempting to tie them into the ECU.

This is the troof.

Yanking it out and running nothing at all is just



Sent from my SM-G955U using Tapatalk