Author Topic: Running hot 454 c30  (Read 1157 times)

Offline Twosquarebodys

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Running hot 454 c30
« on: July 10, 2022, 10:07:51 AM »
Helo Square body land, and thanks for all the info on fuel management. Just pulled 7000 lb. 5th wheel 700 miles with the dually. First time it's been more than 30 miles away from home after the NV-4500 swap. Just want to see kids and grand babies over the 4th and to work out any kinks with the truck. I haven't done anything with fuel management or gear reduction and brothers I had some kinks. I had to baby it to my destination. She ran hot up to 230 and did not want to start without a jump after refueling but didn't hurt anything. Had a pro check out pressure, timing and install a new 180 deg. thermostat and starter. Coming home she did fine until halfway there. Stopped to refuel, she was up to 220(per gauge) and new starter hung up after trying to start. Had to let her cool down and beat on the starter so it would stop spinning and engage. Is this normal running temp for a 454 pulling 7000lb.? And heater coil is bad and got 8 miles to the gallon. When it cools it starts find, and when not pulling temp stays around 190 deg. Thanks in advance for all the info and don't want to move forward until this issue is resolved. Again, thanks for your support. 
« Last Edit: July 10, 2022, 02:15:47 PM by Twosquarebodys »
87 R10 358 CID 700R4 <> 86 C-30 1 TON 454 W/NV-4500 <> 05 SILV 2500HD 6.6 DURAMAX/ALLISON

Offline Mike81K10

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Re: Running hot 454 c30
« Reply #1 on: July 10, 2022, 03:08:26 PM »
May want to try cleaning your cooling system with a flush. Then if you have an automatic transmission and you are going to pull heavy loads, it might be good to have a transmission cooler. Your radiator may need to be replaced with one that has more cores if it is not in good shape or if it is a two core or less. You may also need to get a new fan if you have one of those with three or four blades to one with 6 or go with double electric fans. So bottom line is, ensure your cooling system is in good condition or increase the cooling capacity, pulling heavy loads are harder on the system.
"Tell me and I forget. Teach me and I remember. Involve me and I learn." -Benjamin Franklin

Offline peewee0413

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Re: Running hot 454 c30
« Reply #2 on: July 10, 2022, 03:11:51 PM »
I use a heavy duty fan clutch on my build. Spins with more engine percentage, and the larger surface area of the clutch increases the longevity of the clutch because of heat dissipation.  Stays cooler at stop lights.

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« Last Edit: July 10, 2022, 03:13:37 PM by peewee0413 »

Offline zieg85

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Re: Running hot 454 c30
« Reply #3 on: July 10, 2022, 08:39:49 PM »
Do you have the electric fan before the radiator? 
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline zieg85

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Re: Running hot 454 c30
« Reply #4 on: July 10, 2022, 08:44:50 PM »
here is the one on my 85 with a 454
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline Twosquarebodys

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Re: Running hot 454 c30
« Reply #5 on: July 11, 2022, 01:44:33 PM »
New two-layer radiator was installed a few months before I purchased the truck (1 yr. ago), has 6 blade clutch fan that is working properly, again has new NV-4500, fan in front of radiator, and have a separate cooler for AC but didn't run AC on this trip. 5th wheel weight is 5,500lb unloaded and 7250lb fully loaded so she was properly around 6,000lb. so that is a little better than 1/2 of what this truck can pull so I don't think I would consider that being a heavy load for a dually with a 410 re-end and a 5 speed trany. If I wrong, I want to apologize in advance.
87 R10 358 CID 700R4 <> 86 C-30 1 TON 454 W/NV-4500 <> 05 SILV 2500HD 6.6 DURAMAX/ALLISON

Offline zieg85

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Re: Running hot 454 c30
« Reply #6 on: July 11, 2022, 01:58:04 PM »
New two-layer radiator was installed a few months before I purchased the truck (1 yr. ago), has 6 blade clutch fan that is working properly, again has new NV-4500, fan in front of radiator, and have a separate cooler for AC but didn't run AC on this trip. 5th wheel weight is 5,500lb unloaded and 7250lb fully loaded so she was properly around 6,000lb. so that is a little better than 1/2 of what this truck can pull so I don't think I would consider that being a heavy load for a dually with a 410 re-end and a 5 speed trany. If I wrong, I want to apologize in advance.

Verify the radiator.  two-layer??? 2 core???  Every 454 I have ever had, has had a 4 core
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline Twosquarebodys

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Re: Running hot 454 c30
« Reply #7 on: July 11, 2022, 02:08:41 PM »
2 Core
87 R10 358 CID 700R4 <> 86 C-30 1 TON 454 W/NV-4500 <> 05 SILV 2500HD 6.6 DURAMAX/ALLISON

Offline JohnnyPopper

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Re: Running hot 454 c30
« Reply #8 on: July 11, 2022, 02:50:34 PM »
2 Core radiator is way undersized.  ???

I'm sure it cost the PO less than a 4 core, but that's what you need if you're going to tow anything.
1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline Twosquarebodys

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Re: Running hot 454 c30
« Reply #9 on: July 11, 2022, 08:20:18 PM »
Thanks for the info! I'll put a new radiator in and try again.
87 R10 358 CID 700R4 <> 86 C-30 1 TON 454 W/NV-4500 <> 05 SILV 2500HD 6.6 DURAMAX/ALLISON