Duramax Diesels Forum Truck of the Week
  #16  
Old 07-11-2016, 09:05 PM
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Did GM not ever install a ECM controlled fan clutch on an LMM.? It would be an expensive upgrade.

http://www.wholesalegmpartsonline.co...ssembly=370284


http://www.thoroughbreddiesel.com/ppe/1121100.htm
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  #17  
Old 07-12-2016, 03:57 AM
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I dont have a ecu clutch and harbin has stated his '10 didn't con with on either
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  #18  
Old 07-12-2016, 06:27 AM
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Quote:
Originally Posted by c20elephant View Post
Did GM not ever install a ECM controlled fan clutch on an LMM.? It would be an expensive upgrade.

http://www.wholesalegmpartsonline.co...ssembly=370284


http://www.thoroughbreddiesel.com/ppe/1121100.htm
That referenced C4-C5, would that not be for the kodiak trucks?

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  #19  
Old 07-12-2016, 07:05 AM
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Quote:
Originally Posted by countrycorey View Post
That referenced C4-C5, would that not be for the kodiak trucks?

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Probably so. I know the Kodiak/Top Kick did get an electrically controlled fan clutch with the LMM.
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  #20  
Old 07-13-2016, 06:03 PM
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It is for the 4500 trucks, 2008 pictured.

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  #21  
Old 07-31-2016, 04:46 PM
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Bumping this up. Dealing with an 03 that is running hot. T-stats are getting replaced and I think the stock fan clutch is shot too. Will the 2886 work or should I stick with the replacement number Hayden provides?
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  #22  
Old 07-31-2016, 04:50 PM
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I just put the 2886 on my 05 (LLY) should work fine on your LB7.

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  #23  
Old 07-31-2016, 04:53 PM
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Thank you sir. I did enough searching to make myself 99% sure. Just wanted to BE sure.
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  #24  
Old 07-31-2016, 09:37 PM
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My hayden with 70k miles on it died on my trip last month(always fun sitting in a parking lot in bfe alabama swapping one out because you hit 235 withno fan even attempting to come on). Replaced it with a murray from oreillys(all I could find in bfe alabama where I was). It appears to be a repackaged hayden right down to the 2843 part number. This POS made it about 500 miles and hasn't engaged since. Even hit 240 doing 50 up a 8% grade, and no attempt from the fan when the day before had it roaring away at 215. Less than impressed with hayden right now, plan on a borg warner from kennedy next go round.
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  #25  
Old 07-31-2016, 10:22 PM
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Ferman, I had one of those Murray clutches sent to Oreillys local to me, I don't recall any numbers stamped on but do recall it was made in the USA. Last resort after reading about yours it's either the dealer ACDelco or Borg-Warner from Kennedy.

If you do purchase one from Kennedy post some pictures of it. I spent several hours looking for a Borg-Warner for my 2006 to no avail. Sucks to hear about your trip gone to crap...
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  #26  
Old 08-01-2016, 02:57 PM
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Trip was fine, just had to play it safe on the grades. I went with the speed up to force more air through the stack approach. Only hit 240 the one time, and I probably should have slowed down as I was passing powerstrokes left and right that were pulling smaller travel trailers than I was.
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  #27  
Old 08-01-2016, 03:31 PM
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i have everything running tip top and still cant keep the coolant temp off 240* up hills

i got some changes to do. that said, my 2886 from amazon is still kickin. i have my old stock one as it still worked fine come to find out.

has anyone ever noticed that the fan runs at 2 different speeds when you get into the high RPMs? you really notice it on hot days towing and headed down a grade with the a/c on. its like it kicks up a speed, then down a speed depending on the temp coming through the cooling stack. my stock fan and this clutch do it.
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  #28  
Old 08-01-2016, 07:08 PM
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Viscous fan clutches do engage at different rates depending on the temp of the coil. Good fan clutches engage completely variably where cheaper clutches engage more on or off. I used to run alot of JEEP XJ's, and when you work them, they get warm even with the electric fan roaring away. The afetrmarket fan clutches tended to just engage either on or off whereas teh stock AC DELCO clutches would gradually come in and gradually disengage. Noticed the same on other vehicles as well. I plan on going with the BORG WARNER from KENNEDY at this point in time. I was actually holding out for ther electric one, but he still hasn't finalized it, and I need something soon as my MURRAY from O reillys doesn't even engage cold now with less than 1500 miles on it.
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Old 08-01-2016, 07:53 PM
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Quote:
Originally Posted by THEFERMANATOR View Post
Viscous fan clutches do engage at different rates depending on the temp of the coil. Good fan clutches engage completely variably where cheaper clutches engage more on or off. I used to run alot of JEEP XJ's, and when you work them, they get warm even with the electric fan roaring away. The afetrmarket fan clutches tended to just engage either on or off whereas teh stock AC DELCO clutches would gradually come in and gradually disengage. Noticed the same on other vehicles as well. I plan on going with the BORG WARNER from KENNEDY at this point in time. I was actually holding out for ther electric one, but he still hasn't finalized it, and I need something soon as my MURRAY from O reillys doesn't even engage cold now with less than 1500 miles on it.


This engages the exact same as my stock clutch did with 190k on it and does the same change in speeds like my stocker, it just comes on much sooner. I'd really like to stay on at the higher rate.
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02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
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  #30  
Old 08-01-2016, 09:07 PM
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You could always swap in an EV fan clutch from a van, and try out one of the hayden ev controllers. Then you could control when and how it engages.
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