My '72, work in progress

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Re: My '72, work in progress

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Re: My '72, work in progress

Postby Francis Marion » April 19th, 2014, 12:14 pm

rickf wrote:Sounds to me like you have a blown head gasket. You should not be anywhere near full throttle at 55. I cruise at 55 at no more than 1/2 throttle. If you have to push it that hard there is something wrong in that engine and I suspect the head gasket considering how fast it overheats once you push it. Also the fact that you have no power.

I had this problem. #3 & 4 cylinders were sharing experiences and also leaking into the the coolant. My obvious tell was constant bubbles coming out the radiator with the cap off.
1968 M151A1
1967 M416
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Re: My '72, work in progress

Postby whiterabbit » April 19th, 2014, 8:36 pm

Gonn'a check compression but I had a steady vac reading at the manifold and no bubbles in the radiator. Used the vacuum gauge to help tune the carb. and was getting a nice steady reading.
"It’s the unconquerable soul of man, not the nature of the weapon he uses, that insures victory."
Gen. George Patton
1986-2014 Ordnance Corps RETIRED!
XVIII Airborne Corps Combat Affiliation
Go Ordnance!
1972 M151A2
1978 exMOD 109 Land Rover S3
1942 WLA
M274 (sold) Big mistake. Sigh....
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Re: My '72, work in progress

Postby rickf » April 20th, 2014, 9:08 am

Check the torque on the head bolts, you may find a loose one and it is only blowing by at heavy loads and higher temps.
Even if you don't find a loose bolt it might be worth it to pull the head and see what you have. Not hard to do and gaskets are cheap. Cheaper than constantly throwing parts at it.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
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Re: My '72, work in progress

Postby whiterabbit » April 24th, 2014, 8:19 am

Messed with it last night.
Checked the head bolt torque. Good
Vacuum readings. Stable at 22 inches
But I think I found out what's going on!
The rocker arms shaft was slightly rotated on the mounts. The feed tube was not all the way into the shaft feed hole and the shaft was rotated almost to the point where the hole was closed. Very little oil feed up top! Pulled the assm. and slid the rockers around, no scoring but just a little on #1 & 2. Cleaned and installed correctly. Tons of oil flow from the rockers now.
Will test run today.
"It’s the unconquerable soul of man, not the nature of the weapon he uses, that insures victory."
Gen. George Patton
1986-2014 Ordnance Corps RETIRED!
XVIII Airborne Corps Combat Affiliation
Go Ordnance!
1972 M151A2
1978 exMOD 109 Land Rover S3
1942 WLA
M274 (sold) Big mistake. Sigh....
whiterabbit
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Re: My '72, work in progress

Postby rickf » April 24th, 2014, 1:20 pm

Did you adjust the valves? If they are to tight you could burn a valve plus it would run lean which could possibly give the overheating problem.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
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Re: My '72, work in progress

Postby whiterabbit » June 13th, 2014, 12:26 pm

Didn't want to leave ya'll hanging. I caught hell doing the valve lash while running. Turns out I had too much lash. Did them with the engine off. Runs and starts great now.
The over heat issue??? The darn belts! While reving it up and messing with the carb I noticed the fan took a second to get up to speed. I thought they were tight but they are the old original belts and had been slipping at high speed! Tightened them up good and no more overheat. I feel like an idiot, stupid simple issue I should have caught. Oh well, time to order some belts. Live and learn.
Image
"It’s the unconquerable soul of man, not the nature of the weapon he uses, that insures victory."
Gen. George Patton
1986-2014 Ordnance Corps RETIRED!
XVIII Airborne Corps Combat Affiliation
Go Ordnance!
1972 M151A2
1978 exMOD 109 Land Rover S3
1942 WLA
M274 (sold) Big mistake. Sigh....
whiterabbit
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Re: My '72, work in progress

Postby lpcoating » June 13th, 2014, 6:18 pm

Very nice picture -looks good...
M151 Body Panels - http://www.m151bodypanels.com/

'68 A1 - Under full resto
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Re: My '72, work in progress

Postby Fil Bonica » June 13th, 2014, 8:43 pm

It's the simple thing that usually bite you in the butt!
Good to see you found them.

Have fun

Fil Bonica
K1ABW
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Re: My '72, work in progress

Postby whiterabbit » June 13th, 2014, 9:10 pm

Thanks all!
It wouldn't be back in service without all the help and knowledge from the good, no, great folks on this forum!
It's amazing to look back on the first few posts on this thread and see the condition of the jeep then and now. The wife is loving it and I sneak out with it every so often. Drove it to post a few days back and the rubber necking never stopped.
I guess I can wrap up this thread by saying again,
THANKS FOR ALL THE HELP REBUILDING MY M151A2
:)
"It’s the unconquerable soul of man, not the nature of the weapon he uses, that insures victory."
Gen. George Patton
1986-2014 Ordnance Corps RETIRED!
XVIII Airborne Corps Combat Affiliation
Go Ordnance!
1972 M151A2
1978 exMOD 109 Land Rover S3
1942 WLA
M274 (sold) Big mistake. Sigh....
whiterabbit
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