Hello. I have a T800 with an N14 Cummins, and am needing a better radiator. I changed my OEM 3 row last winter due to it having significant external corrosion, and went with a 5 row from my local KW dealer. I was told the 5 row is the cats meow, and I would never overheat again. I'm not impressed, and feel it actually does worse at cooling than the 3 row I had.
I haul big round bales of hay. 10' wide, 15' tall. Usually weigh 83-85k, but those of you that have done it can confirm hay pulls terrible hard. Would prob be comparable to pulling a 100k load with normal wind drag. I am set at 525/1850 with a power box on top of that, and use all the power I have probably 80% of the time. I load in eastern KS, and haul to western Kansas, which is 5.5-6 hrs. Then turn around and come home empty.
The dealer has graciously said they will give me full credit for the 5 row, as it is not performing like it was advertised.
What radiators do you heavy haul guys like to use? 4 row with dimple tubes? Go back to the 3 row OEM? This truck stays on the highway 99% of the time, it's not a field truck that will be getting dirt and hay in the fins. I do drive a few gravel roads (slowly) depending on where I load my hay from.
I would like to be able to pull hard in 100-105 degree temps without overheating. KW dealer says there isn't a radiator out there that will keep up with the demands I am putting on it. I find that hard to believe. I have talked to Pittsburg power, PDI, and several radiator shops, and I get the feeling that there would be options that can keep that engine at it's operating temp of 180-200 even when pulling hard for long periods of time.
I know it's not a thermostat issue (have checked, replaced, checked again, etc), or a water pump or belt problem. The 5 row just isn't getting the air flow thru it I need it seems, which is what I have heard others say is a weakness of the 5 row design.
Thots?
T800 Radiator replacement recommendations?
Discussion in 'Heavy Haul Trucking Forum' started by RogerShilling, Jul 17, 2022.
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kylefitzy Thanks this.
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Strange. Most folks running the T-800 out in these parts are running 140k lbs in the summer and never hear of issues with overheating with the OEM radiator.
All the shrouds/guards are still in place? Fan not installed backwards?Goodysnap Thanks this. -
I know how it does now to within a degree. The other day it was around 95 outside, and I got it to 216 before backing off of it. -
Fan shroud is there, but I do believe there are a couple rubber strips that are missing that used to run vertically along both sides of the radiator. I know they would help prevent air from bypassing the radiator, and I need to install them and possibly do some other things to help force air thru, not let it go around. But I feel like while those things may help, they are not the root cause. -
Why did you back out of it? Is your fan not working? My 3406e has a 700 file and my fan doesn't even kick on until 217. It puts out like 9 something to the crank and 7 something to the wheels with a dimpled 4 row. Also has a "high performance" CAC. It does pretty good but if I had to do it all over again I would take it to radiator shop I trust to build one custom.
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Guess I figure when Cummins says 180-200 operating temp that maybe I shouldn't be trying to see how far above that I can make it go. -
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Are you sure it’s not just dumping too much fuel? What the cac and air filters look like? What’s the egt’s? Also wasn’t it like 110 in Kansas a couple days ago? May just need to back out of the pedal and don’t beat your horse to death.
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My N-14 is similar setup in 379, same also on anything over 80 degrees easier to leave fan on.
I think the glitch is the thermostats not fully opening until 190*, and then fan on at 200*.
Figure out how too get ecm fan on at 210 would probably help alot?
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