Winter kit question 1966 m151a1..

1959 - 1978, M151, M151A1, M151A2, Technical questions and discussions, regarding anything related to the M151.
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steveperryman
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Winter kit question 1966 m151a1..

Post by steveperryman » Sun Nov 11, 2018 11:14 am

[*]Hi all, I just received my 2nd m151 for restoration. It has a few extra parts that I am not familiar with... One is the cold weather package. I cant find where the switch is on the heater to divert heat into the cab , instead of up on the windshield...

I took a photo of the part that I believe goes to the heater to pull out and get some heat into the cab, but I cant find where it attaches to...

I also have small bubbling along the head gasket, compression is 100-110 on all 4, anything I should worry about?

And lastly..... It came with an original canvas double back window soft top. The canvas has a few tears that I can have repaired at a shop, my question is if it worth it, as I know new vinyl tops are cheap...

I have the photos of the jeep and the parts in question in this shared google album.

https://photos.app.goo.gl/9mSUbDjx4goc7WH49

Thanks for your help...

-Steve

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muttguru
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Re: Winter kit question 1966 m151a1..

Post by muttguru » Sun Nov 11, 2018 2:22 pm

Steve.... that 2-window top is correct for M151 and M151A1. The vinyl tops are correct for A2s and were retro-fitted to earlier models but depending on how authentic you want your mutt to be, the canvas version is correct for your '66 A1.

As for the heater, that looks like a Hunter MFG Co hot-water heater.....but it should be installed against the firewall up behind the passenger-side dash. It looks like it has been mounted on the floor. That vent you mention (with the grille) is mounted on the external firewall on the passenger-side. If there is no cut-out there already, you are going to have to make one.
On the driver's side, up under the dash, should be a vent outlet with a small circular "door". That door should be pushed to the "closed" position if you want the heat to divert to the windshield....but the door should be "open" to warm the crew compartment (and the driver's feet !).

Have you read the instructions for installing the hot-water heater? You should....... :)
Ken
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steveperryman
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Re: Winter kit question 1966 m151a1..

Post by steveperryman » Sun Nov 11, 2018 3:56 pm

Hi Ken, thanks. I have yet to navigate the on line manuals for the heater... I'll see what I can find. Thanks for the info on the top, and I'll get a closer look at the back of the heater...

Thanks again,

Steve

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muttguru
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Re: Winter kit question 1966 m151a1..

Post by muttguru » Mon Nov 12, 2018 7:49 am

Hi Steve......

the installation and maintenance instructions are detailed in TM9-2320-218-34-1 dated July 1988, Sections 16-19 through 16-25, pages 16-60 through 16-92. They cover everything you need to know about the heater.

It isn't an easy job to install the hot-water heater and after reading the instructions you may not want to go any further :)

If you want a copy of that TM section, e-mail me directly as below.
Ken
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Re: Winter kit question 1966 m151a1..

Post by Fil Bonica » Mon Nov 12, 2018 8:35 am

Have installed several over the years.
Can agree that it is one of the more challenging projects!
As Ken said , refer to the 34-1 for install info.
Feel free to call if you want help.

Fil Bonica


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Re: Winter kit question 1966 m151a1..

Post by markrdje » Mon Nov 12, 2018 12:46 pm

Image

/img] Here is what Ken was talking about on driver's side, up behind the dash, the picture on the right
change user name to mark

steveperryman
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Re: Winter kit question 1966 m151a1..

Post by steveperryman » Wed Nov 14, 2018 6:36 pm

I thought replacing the master cylinder would be the hardest thing I did on a mutt!!

This unit is mounted correctly on the wall, up under the passenger dash, this model has a small flap right under the metal box that diverts the hot air into the 2 flex hoses. The flap pulls down and the passenger side gets heated, I can't see any heat for the driver's side however...Image

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steveperryman
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Re: Winter kit question 1966 m151a1..

Post by steveperryman » Wed Nov 14, 2018 8:27 pm

Just an FYI, there is a metal tube under the dash of the driver's side that the flex time merges with, that tube has a flap on the bottom you can hinge down and it will let heat out onto the driver's knees... Image

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Re: Winter kit question 1966 m151a1..

Post by muttguru » Thu Nov 15, 2018 2:54 am

muttguru wrote:
Sun Nov 11, 2018 2:22 pm
Steve.... On the driver's side, up under the dash, should be a vent outlet with a small circular "door". That door should be pushed to the "closed" position if you want the heat to divert to the windshield....but the door should be "open" to warm the crew compartment (and the driver's feet !).Ken
Steve..... you've found the driver's side heater vent......as I described earlier. The puzzle for me was the original picture of the heater unit looked like it was mounted on the floor.....but it was the angle of the shot which made it look that way.
It seems you are good to go.

Did you find the fresh-air inlet vent on the firewall/bulkhead in front of the windshield?
Ken
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Re: Winter kit question 1966 m151a1..

Post by Rickf » Thu Nov 15, 2018 1:06 pm

If you run a 185 degree thermostat it will be better for the engine and much better for the heat in the vehicle. It will also help to eliminate the common flat spot at cruise speed.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

steveperryman
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Re: Winter kit question 1966 m151a1..

Post by steveperryman » Thu Nov 15, 2018 6:39 pm

Great idea on the thermostat, my other m151 runs at about 140, so I may replace both of them if it helps the motor performance.

It appears the cold air intake is just the right side of the heater box, there is only a small gap between the heater box and the side of the Jeep... I'll look around for a cold air intake through the firewall though...

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