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Temperature spike after shut off on a new motor?
#1053092
08/14/11 10:35 PM
08/14/11 10:35 PM
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Joined: May 2004
Posts: 4,920 Joplin, MO USA
Robbins
OP
master
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OP
master
Joined: May 2004
Posts: 4,920
Joplin, MO USA
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My 440 has less than 500 miles on it and I was just curious to see what's normal for temperature spike after shut off.
Thanks for your time.
Moparlee
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Re: Temperature spike after shut off on a new motor?
[Re: Robbins]
#1053094
08/14/11 10:45 PM
08/14/11 10:45 PM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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they will do that. mine is about 20*-30* increase at shut down from a 40 mile run,maybe less in the winter. I just added a 7 blade thrmo clutch fan to my BB in the 88 truck,it would climb past 190*-200* idleing for a long time with the 5 blade,it now stays right at 180* or just under. has about 10*-20* increase now
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Re: Temperature spike after shut off on a new motor?
[Re: scratchnfotraction]
#1053095
08/15/11 12:23 AM
08/15/11 12:23 AM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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Iron heads? It's normal
The cast iron will hold heat, once it's shut off, that heat soaks into the water. Aluminum heads help to reduce this as they dissipate heat into the water faster, and won't "hold heat".
As long as the temps drop again once you start it and get the water flowing, then you don't have a problem. Only way to remedy the issue is to get an electric water pump and fan to continue the cooling after the engine is shut off, but going all electric cooling isn't needed on the street
**Photobucket sucks**
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Re: Temperature spike after shut off on a new motor?
[Re: 70Cuda383]
#1053096
08/15/11 07:15 PM
08/15/11 07:15 PM
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Joined: May 2004
Posts: 4,920 Joplin, MO USA
Robbins
OP
master
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OP
master
Joined: May 2004
Posts: 4,920
Joplin, MO USA
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Thanks guys I appreciate the feed back. I've got the live temp and guage on the dash also that I'm looking at also using the new temp gun from Amazon........Raytek(a fluke company)AutoPro gun. I was checking things out on it too.
It crawls up towing also, and once driving also. Not real bad, just thinking of going with the help of an electric fan, maybe in the shroud like my 2002 Dakota has.
Last edited by Robbins; 08/15/11 07:16 PM.
Moparlee
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Re: Temperature spike after shut off on a new motor?
[Re: Robbins]
#1053097
08/16/11 11:01 AM
08/16/11 11:01 AM
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Joined: Feb 2007
Posts: 230 Long Island, New York
Tony H
enthusiast
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enthusiast
Joined: Feb 2007
Posts: 230
Long Island, New York
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Just was playing with Thermoststs and E- fans last night on a new engine install. I shut off the engine, I left the E fans running. As the engine spiked about 15 degrees ( about 3 minutes after shutoff) I started it back up for about 5 seconds. The much cooler fan from the radiator was pumped into the Motor. Temp came down imediatley. I think this will be my shut down ritual in the future.
'75 CJ5 with all glass body and a 350 Chevy SB '85 Chevy Stepside (the wife's) '89 Volvo All 100% maintained by me. '70 valiant DD for my son '74 Dart Swinger..Latest endeavor http://home.lyse.net/brox/TonyPage4.html
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