EOT/ECT temps when towing a load
Fleet Owner
Joined: Nov 2003
Posts: 27,919
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First task would be to get the coolant temps down when towing. Then I would worry about the oil cooler issue.
Thermostats are easy to change, I would start there. Lots of people have had issues with the OEM thermostat. I am not a big fan of the Mishimoto thermostats, but some folks really like them. Some people use Stant, and I am going to switch to a Gates thermostat (Rock Auto) soon. I am not happy with my OEM one.
You need to know what coolant you are using. The wrong coolant can cause big problems. The recommended coolant is certainly NOT the OEM Frod Gold or it's GO5 equivalent. You need to be running a CAT EC-1 rated ELC coolant. To switch, you need to THOROUGHLY flush the old coolant out (final 2-3 flushes being w/ distilled water, or better yet, ALL the flushes w/ distilled water) and then after the very last drain, add 3.5 gallons of concentrated coolant. You finish by topping off with distilled water. That way you get a 50/50 mix - which is very important.
Thermostats are easy to change, I would start there. Lots of people have had issues with the OEM thermostat. I am not a big fan of the Mishimoto thermostats, but some folks really like them. Some people use Stant, and I am going to switch to a Gates thermostat (Rock Auto) soon. I am not happy with my OEM one.
You need to know what coolant you are using. The wrong coolant can cause big problems. The recommended coolant is certainly NOT the OEM Frod Gold or it's GO5 equivalent. You need to be running a CAT EC-1 rated ELC coolant. To switch, you need to THOROUGHLY flush the old coolant out (final 2-3 flushes being w/ distilled water, or better yet, ALL the flushes w/ distilled water) and then after the very last drain, add 3.5 gallons of concentrated coolant. You finish by topping off with distilled water. That way you get a 50/50 mix - which is very important.
Fleet Owner
Joined: Nov 2003
Posts: 27,919
Likes: 3,637
Yes, fueling is reduced to try to hold back engine temps at ECT over 221*, EOT over 253*. Mark asked about the fan because multiple factors can trip 100% fan clutch engagement, and EOT being high enough is one of those.
Mark - page 1-33 is the 221*ECT/253*EOT derating language (second pic), the first pic is from a chart on 3-11 as part of the pinpoint tests of concern of "engine down on power with no CEL". I wanted to type 235 for oil but that seemed wrong, I searched in the wrong book and 260* popped up. Weird.
Mark - page 1-33 is the 221*ECT/253*EOT derating language (second pic), the first pic is from a chart on 3-11 as part of the pinpoint tests of concern of "engine down on power with no CEL". I wanted to type 235 for oil but that seemed wrong, I searched in the wrong book and 260* popped up. Weird.
My 2006 PC/ED does not have those higher values in Section 3. In fact it doesn't actually list the defuel values in that section.
Additionally, the injector contribution tests must be done w/ oil temps at or below 246*F which leads me to believe the 253*F defuel point.
Which year PC/ED manual are you using?
More Turbo
Joined: Nov 2004
Posts: 577
Likes: 12
From: Cumming, Iowa
Dustin, My rig in sig line towing my 12K Heartland Cyclone 35 foot toy hauler 98 degrees, A/C blasting last Sunday. Highest coolant temp 212 Highest oil temp 219.(torque Pro) Pushing it from Springfield IL to DSM about 70 to 75 all the way. Now here is the disclaimer. two winters ago about 110K on the clock system chem flush and new coolant then a month later new cooler. I believe my temps are a good example of a cooling system in good shape. Stock cooler will do a fine job if not plugged IMHO.....Bill
Laughing Gas
Joined: Jan 2007
Posts: 883
Likes: 5
Dustin, My rig in sig line towing my 12K Heartland Cyclone 35 foot toy hauler 98 degrees, A/C blasting last Sunday. Highest coolant temp 212 Highest oil temp 219.(torque Pro) Pushing it from Springfield IL to DSM about 70 to 75 all the way. Now here is the disclaimer. two winters ago about 110K on the clock system chem flush and new coolant then a month later new cooler. I believe my temps are a good example of a cooling system in good shape. Stock cooler will do a fine job if not plugged IMHO.....Bill
Token Redneck
Joined: Jun 2007
Posts: 9,339
Likes: 350
From: Breckenridge, TX
2007 - Print date 11/2006. We might just be seeing high/low values; fuel derating for ECT starts at 221 per Sec 1 and ramps up to noticeable power loss at 235* per Sec 3; the point of that pinpoint test is low power with no CEL, so ECT and EOT maximum derating would be a concern they'd have to check for.
Token Redneck
Joined: Jun 2007
Posts: 9,339
Likes: 350
From: Breckenridge, TX
Yes it should. The BPD system completely splits oil cooling separate from coolant to a plate cooler in the radiator stack. Expensive (and IMO not necessary since a correctly functioning stock system should be fine for any 6.0), but it's a permanent solution:
https://www.bulletproofdiesel.com/bu...heavy-duty.htm
https://www.bulletproofdiesel.com/bu...heavy-duty.htm
Logistics Pro
Joined: Jul 2014
Posts: 4,673
Likes: 532
From: Houston, Texas
I just finished flushing my shuttle bus and refilling with G05. Now I'm reading that's not good??? And all my other trucks have that as well. Arrgh.
My truck delta is usually 10-18, but it seems to cool down quickly, and I'm almost always pulling a trailer, plus the one I drive most is an F450 with a heavy flatbed with tool boxes, so I've assumed my higher deltas are OK. Not great, but OK.
I was going to post about my shuttle bus though. I've only had it out a few times since I got it shipshape, only once on the freeway. It got up to 222 just cruising along about 60. It is hot as heck here, and I think Eseries run hotter. The delta was 10-12. But, it has me a bit worried because I was hoping to tow 5000-7000lbs with it once I get a hitch installed. I see E450 RVs pulling cars, and I'm thinking those weigh more than my shuttle. Do y'all think I can do it? Does it sound like it's working right?
Last edited by IHateCommieCars; Jun 4, 2018 at 12:09 AM. Reason: clarify
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More Turbo
Joined: Nov 2004
Posts: 577
Likes: 12
From: Cumming, Iowa
Thanks Mark, Wedge still running stock original fan clutch, and I forgot to mention rad is only about two years old as well it's the third one as the previous two were replaced due to Deer hits prior to the cooler and cooling system service it would do it usually after a long hill pull. Since the service I have maybe heard it roar two or three times......Bill.
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