Horton Fan Clutch Parts and such.

[NIsaacs]

Michael, thank you for the post. I guess I missed it. I just noticed you had a Horton in your signature and went here to ask about it, then saw you already did.

I noticed you seem to be well versed in a lot of subjects on these trucks, any advise on a simple fix for my truck?

I just hauled a heavy load up a mile long 6% grade, cool out (55*) in 5th gear, cruise set at 58 mph and at the top I was at 215 and the clutch finally engaged. On a hot day it really sucks. I don't know if you noticed or not, but every thing connected to the cooling system is new. Turning my juice down, below level two, is not an option

Nick

 

[Michaelsloft]

Michael, thank you for the post. I guess I missed it. I just noticed you had a Horton in your signature and went here to ask about it, then saw you already did.

I noticed you seem to be well versed in a lot of subjects on these trucks, any advise on a simple fix for my truck?

I just hauled a heavy load up a mile long 6% grade, cool out (55*) in 5th gear, cruise set at 58 mph and at the top I was at 215 and the clutch finally engaged. On a hot day it really sucks. I don't know if you noticed or not, but every thing connected to the cooling system is new. Turning my juice down, below level two, is not an option

Nick

Nick, thank you for the kind words, but I can't say I'm well versed nor am I knowledgeable. And I must say I learn something every time I log onto the TDR forum from the many knowledgeable and well informed members! Been driving the same truck for almost 19 years and more than 250,000 miles all the while trying to get it to last and run reliably for as long as possible.

The Horton EC450 is a well designed piece of equipment and I was fortunate to have gotten the advise to install one from a retired engineer that happened to still be working for Cummins on the 800 tech hotline!

Soon after delivery of the truck and a few thousand miles I called the tech line to inquire about the fluctuating engine temps while climbing and descending hills/long grades etc. Was advised this in normal, but the OEM Dodge fan would not cool the truck adequately under some conditions and to consider the Horton. Also, the engineer ( who sounded like an "old timer" with many years experience) emphatically stated to only use a 180 degree thermostat in the 1999 24 valve Cummins and to check what thermostat was in the engine. Fortunately, it was delivered from the factory with a 180 degree thermostat which is even more important to use when having a Horton EC450.

The EC450 with the stock temp sensor that was included with my kit in 2001 is a 192 degree unit to turn the fan on automatically at 192 and off at 185 degrees where the 180 degree temp thermostat is fully open. The fan rarely operates automatically at speed on the road and I on occasion switch the fan on to cool down the engine temp before a long uphill grade - per the advise of the Cummins engineer. Also, after installing the Horton the engine runs quieter and runs more steady temps on the road. I get improved MPG of about 5 to 10% depending on conditions. The Horton is noisy when operating above 1600 RPM, but does not stay on very long to cool the engine to 185! The fan is used mostly to cool off the engine for shutdown and to operate the A/C when not moving or at speeds below 15 MPH.

I don't run a tuner and have adequate power for my uses of the 1999, but I have never seen my engine temp above 192 (or similar using the stock OEM fan) with the Horton and the Cummins engineer emphatically stated to never operate the engine above 195?? I'm not an engineer nor a mechanic, but I would recommend trying to cool things down a bit. I don't remember what temp thermostat you are running in your truck??
I have used Rotella ELC ever since my conversation with the Cummins engineer and it has really helped with cooling, engine is quieter and steadier temps!

Just some thoughts Nick and I look forward to hearing how you make progress with your cooling system on your Gen 2.

Michael

 

[NIsaacs]

Nice write up, thanks!

I still run the oem recommended 192/195, I like the extra heat generated in the winter with Dodge's junky heater. I am thinking of changing to 180 this summer and see what happens. It might kick the fan in sooner. My '91 is the recommended 180, and it doesn't overheat, but it does have less power.

Nick