Overheating?

From VC-1 to WC64-KD.
Kaegi
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Location: Allyn WA

Re: Overheating?

Post by Kaegi »

if the fan on backwards? sorry have to ask. also are you running a stock water pump pulley and crank shaft pulley?
June J
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My garage: 1942 Dodge WC 53
1941 Willys MB
1960 M38A1 Nekaf
Location: New Zealand

Re: Overheating?

Post by June J »

Hi Kaegi,
So stock water pump and pulley. I'm pretty sure that the fan is on the right way, it sucks a sheet of cardboard hard against the radiator when I slide it up, and I can feel a good strong draught when I'm under the hood with the engine running.

The thick boss of the fan is against the water pump pulley.
Cheers
Ian
1942 Dodge WC 53
1941 Willys MB
1960 M-38A1 Nekaf
Adam in Wa
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My garage: 48 Power Wagon
42 WC53

Re: Overheating?

Post by Adam in Wa »

Is it possible the carb is running too lean? Check the plugs, and tailpipe color. Run it with the choke partially closed to test it? Do you have another carb to swap on?
motto
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My garage: Harley Davidson 42WLA, Dodge WC63, Dodge WC57, Chevrolet 1-1/2 ton 4x4. Originally an Earth Borer, Pole Setter. Drilling rig gone and truck now mounts a #7 Set Lifting Frame. i.e.: Light Wrecker.
Location: 70km from Melbourne Australia

Re: Overheating?

Post by motto »

I once purchased a Jeep that the owner could not stop from boiling soon after setting off though it would happily idle all day. The PO had the head off twice to get it crack tested and given up in disgust.
A friend played around with it to see if he could sort it out. He hadn't been at it long when he called me over and said 'have a look at this!'
Every time he revved the engine up the lower radiator hose was sucked flat completely blocking off the water flow. This is why some hoses have the coil spring inside them.
Just a thought.

David
June J
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My garage: 1942 Dodge WC 53
1941 Willys MB
1960 M38A1 Nekaf
Location: New Zealand

Re: Overheating?

Post by June J »

Running lean is a possibility, although I did check the main jet size (0.045") when I overhauled it so I think its unlikely, I will swap carbs just to be sure.

Hi Dave, the Dodge (as you know) has 2 short lengths of reinforced hose, where the Jeep had a longer moulded hose so sucking flat is again unlikely but I will certainly check this as well.

Please keep the suggestions coming.

Cheers
Ian
1942 Dodge WC 53
1941 Willys MB
1960 M-38A1 Nekaf
Kaegi
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Re: Overheating?

Post by Kaegi »

is the cap sealing radiator too tight? over pressurized? stock is either zero PSI cap or 2.5 lb cap. I have built custom cars and learned early on that just having too high of a PSI rad cap can cause overheating on some combinations.
June J
Technician 3rd Grade
Technician 3rd Grade
Posts: 330
Joined: Fri Jun 18, 2010 6:27 am
My garage: 1942 Dodge WC 53
1941 Willys MB
1960 M38A1 Nekaf
Location: New Zealand

Re: Overheating?

Post by June J »

Good point. Once I get it back up and running, I will try that.
Thanks

Ian
1942 Dodge WC 53
1941 Willys MB
1960 M-38A1 Nekaf
June J
Technician 3rd Grade
Technician 3rd Grade
Posts: 330
Joined: Fri Jun 18, 2010 6:27 am
My garage: 1942 Dodge WC 53
1941 Willys MB
1960 M38A1 Nekaf
Location: New Zealand

Re: Overheating?

Post by June J »

Well, would you believe it???? Faulty temperature gauge was the problem. I simply do not know what the issue is with the gauge, I just know I tested the gauge against a candy thermometer and against a digital multimeter type gauge and always found the vehicle gauge was 100% accurate. I can only assume there is either an air bubble in the ether, or the capiliary system has been overfilled.

Either way I am soooo relieved :-).
Thanks to all for your suggestions and input.

CHeers

Ian
1942 Dodge WC 53
1941 Willys MB
1960 M-38A1 Nekaf
Kaegi
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Location: Allyn WA

Re: Overheating?

Post by Kaegi »

thats good news! overheating no a topic that comes up often with these trucks. its a great system
June J
Technician 3rd Grade
Technician 3rd Grade
Posts: 330
Joined: Fri Jun 18, 2010 6:27 am
My garage: 1942 Dodge WC 53
1941 Willys MB
1960 M38A1 Nekaf
Location: New Zealand

Re: Overheating?

Post by June J »

Hi Kaegi,
I took the gauge to the instrument technician who could not fault it. His only suggestion was that its possibly something electrical earthing through the capillary tube.

Although there are a number of earth straps between the engine and the frame/body I am going to add one specifically for the dash panel.
Here's hoping.

Stay well!

Ian
1942 Dodge WC 53
1941 Willys MB
1960 M-38A1 Nekaf
Kaegi
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Joined: Thu Jan 11, 2007 8:47 pm
Location: Allyn WA

Re: Overheating?

Post by Kaegi »

wow thats a new one. never heard of a mechanical gauge reading differently like that. ?? maybe removing it got the air bubble out of the gauge and may work when you re install it?