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redrad Member

Joined: Sep 17, 2020 Posts: 33 Location: Cresson, Tx
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Posted: Wed Jan 05, 2022 9:37 am Post subject: M38 Overheating |
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While driving Jeep last Sunday, it overheated to the point of steam coming out of radiator cap relief. I shut it down, and after it cooled off I removed radiator cap to add coolant, looking down into the radiator I cannot see the tubes because of some sort of baffle. My problem may be a stuck closed thermostat, so i will remove and test, but also i need to flush all the crud in the cooling system. the real question is how to know when radiator is full if you cannot see top of the tubes. I will attempt to attach pic from my album.
http://willysmjeeps.com/v2/modules/gallery/albums/album718/IMG_2776.thumb.jpg
Well that did not work out very well _________________ Johnny D
1951 M38 Ser#1723 |
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keats Member

Joined: Apr 14, 2005 Posts: 341 Location: Middletown Ct
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Posted: Wed Jan 05, 2022 10:55 am Post subject: |
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from the manual.
Fill the cooling system with water, or antifreeze solu- tion, of sufficient strength to protect the system against the lowest anticipated temperature, to a level approxi- mately 1 inch below the bottom of the filler neck. _________________ Gary Keating
1949 C3A, 1952 M38,
1954 M170, 1957 Cj3B |
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redrad Member

Joined: Sep 17, 2020 Posts: 33 Location: Cresson, Tx
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Posted: Wed Jan 05, 2022 7:34 pm Post subject: |
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Thanks for the info, Gary _________________ Johnny D
1951 M38 Ser#1723 |
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redrad Member

Joined: Sep 17, 2020 Posts: 33 Location: Cresson, Tx
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Posted: Wed Jan 05, 2022 7:40 pm Post subject: |
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[/img] _________________ Johnny D
1951 M38 Ser#1723 |
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OKCM38CDN Member

Joined: Feb 17, 2012 Posts: 530 Location: Del City, OK
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Posted: Thu Jan 06, 2022 8:51 am Post subject: |
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IMO time for a good flush... _________________ Hal, KB1ZQ
TSGT, USAF (Ret)
1952 M-38 CDN CAR 52-31313
1952 M-100 Strick #104
1951 Willys Wagon (For Sale)
1954 Willys M38A1 201001205
Tornado Alley
Del City, OK |
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Mike_B Member

Joined: Dec 10, 2017 Posts: 349 Location: Southern Maryland
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Posted: Thu Jan 06, 2022 7:51 pm Post subject: |
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If it were mine I'd pull the radiator and turn it upside down and flush it backwards with the garden hose. If you put it on top of a 5-gallon bucket you can catch the junk and see how bad it is. Don't pressurize the radiator, just let the water run free. so you don't split a seam.
You can also run water down the thermostat hole and back flush the block as well.
Mike B  _________________ Mike B
1953 M38A1 Brush Truck
1952 M38
1951 M100 Trailer |
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redrad Member

Joined: Sep 17, 2020 Posts: 33 Location: Cresson, Tx
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Posted: Sat Jan 08, 2022 10:44 am Post subject: |
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Next warm day I am pulling thermostat and flushing engine and radiator,
Thanks as always for the tips _________________ Johnny D
1951 M38 Ser#1723 |
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JBJeep Member

Joined: Nov 16, 2021 Posts: 73 Location: NE Washington
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Posted: Mon Jan 10, 2022 12:56 am Post subject: |
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Lord knows, I'm no mechanic...but with every restoration I have done, cleaning/flushing/repairing or replacing the radiator is one of the first things done.
If you don't know the service history of a car and you plan on driving it, it just makes sense. _________________ 1955 M38A1 MD 82551
Former owner/restorer of 1977 CJ-5, stock with factory V-8.
Used as a daily driver for seven years. |
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