A2 motorpool rebuild

A place to post pics and descriptions of ongoing restoration projects

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Husker
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Re: A2 motorpool rebuild

Unread post by Husker » March 15th, 2019, 9:08 pm

Ah cool I can totally bring it to the horn braket.

Final question of the night is my body messed up if my drive shafts pull the yokes off the transmission a little bit? Or is that kind of normal. It isn’t to far out maybe 1/2 inch to an inch
US Army Fort Belvoir

19XX M35 something. Sold......
1972 M151A2
1967 M416
On the hunt for an M1031

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m3a1
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Re: A2 motorpool rebuild

Unread post by m3a1 » March 15th, 2019, 11:51 pm

Yokes shouldn't "pull out"! There should be a bolt right through the center of the yoke and it threads into the output shaft, keeping the two together.

Your axle drive shafts do all the extending and compressing.

Go here to see a little tutorial on axle drive shafts.

http://g838.org/viewtopic.php?f=27&t=8354&start=105

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rickf
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Re: A2 motorpool rebuild

Unread post by rickf » March 16th, 2019, 8:58 am

TJ is talking about the axle shafts, I believe you are talking about the drive shafts coming from the transfer case. Yes they will be out just a little. This is the only way to get the shaft in since there is no slip joint in the shaft. You have to slide the yoke all the way back into the transmission and then sneak the joint into the differential and pull it back out to seat the joint.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

Husker
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Re: A2 motorpool rebuild

Unread post by Husker » March 16th, 2019, 10:34 am

Yes the main driveshafts thanks rick just making sure my everyday jeep has slipyokes so it’s easy to emplace the driveshaft as it where
US Army Fort Belvoir

19XX M35 something. Sold......
1972 M151A2
1967 M416
On the hunt for an M1031

Husker
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Re: A2 motorpool rebuild

Unread post by Husker » March 16th, 2019, 8:21 pm

Engine tuned up pretty well today used a 24v timing gun and the dwell to look at the idle speed

How does the throttle linkage stay on the accelerator peddle and carb? Mine is just a rod with the pegs on it it stays on a little bit but not well are there supposed to be threaded? I might drill it for coffee pins or safety wire
US Army Fort Belvoir

19XX M35 something. Sold......
1972 M151A2
1967 M416
On the hunt for an M1031

Hambone
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Re: A2 motorpool rebuild

Unread post by Hambone » March 16th, 2019, 9:34 pm

There is a little latch clip that goes on there, I think it's the same on both ends.
Image

Husker
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Re: A2 motorpool rebuild

Unread post by Husker » March 16th, 2019, 10:11 pm

Oooo where does one buy part #8 then.....
US Army Fort Belvoir

19XX M35 something. Sold......
1972 M151A2
1967 M416
On the hunt for an M1031

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m3a1
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Re: A2 motorpool rebuild

Unread post by m3a1 » March 16th, 2019, 10:14 pm

That's an easy one. Auto zone or O'Reilly. They'll come in a pack with with several different sizes. Cheap, too.

Husker
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Re: A2 motorpool rebuild

Unread post by Husker » March 16th, 2019, 10:22 pm

Oh nice I’ll look tomorrow any idea what the are called technically
US Army Fort Belvoir

19XX M35 something. Sold......
1972 M151A2
1967 M416
On the hunt for an M1031

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m3a1
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Re: A2 motorpool rebuild

Unread post by m3a1 » March 17th, 2019, 12:21 pm

Throttle linkage clip. Dorman 41016 or 41047. I keep a bunch in a baby food jar that's around here....somewhere. They DO come in a variety of sizes so make sure your'e either sourcing the correct size or at the very least, an assortment pack which will vastly improve your odds of getting the right size.

Husker
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Re: A2 motorpool rebuild

Unread post by Husker » March 19th, 2019, 9:53 pm

Installed throttle linkage, replaced the brake lines and bled them and drove it around the block for the first time. I tuned the engine set timing and idle on Sunday and it was doing fine but it seems to backfire. Will it backfire due to lack for fuel? Or exhaust pressure?

It drove around the block twice with pretty much no issues expect that one
US Army Fort Belvoir

19XX M35 something. Sold......
1972 M151A2
1967 M416
On the hunt for an M1031

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rickf
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Re: A2 motorpool rebuild

Unread post by rickf » March 19th, 2019, 10:23 pm

Backfire on acceleration or deceleration? Acceleration could be timing to far advanced, or running to lean. Did you set it right on the line and if you have a dial back timing light was it set to 0? Backfire on deceleration is usually a sign of an exhaust leak at the manifold to pipe gasket. It is also a sign of a coil going bad but that is accompanied by bucking and no power.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

Husker
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Re: A2 motorpool rebuild

Unread post by Husker » March 19th, 2019, 10:53 pm

It seemed like deceleration so I will check the manifold and exhaust seals it the first time driving after rebuilding the engine so it’s definitly posssible

I have the standard 24 volt timing light so I set it to align with the notch at idle it seemed to work properly
US Army Fort Belvoir

19XX M35 something. Sold......
1972 M151A2
1967 M416
On the hunt for an M1031

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rickf
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Re: A2 motorpool rebuild

Unread post by rickf » March 20th, 2019, 9:59 am

Could also be a rich idle mixture but even if it is you still need oxygen to light it off so it still points to a leak. Manifold leaks at the head do not usually cause backfires on these for some reason. Thankfully since the manifolds always seem to leak. :roll:
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

Husker
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Re: A2 motorpool rebuild

Unread post by Husker » March 21st, 2019, 6:42 pm

My exhaust to manifold connection was super loose it no longer backfires on deceleration but is now doing it on acceleration ran it in the garage for a while and just ran the throttle at no load saw that the exhaust is glowing red
I’m going to check my valves to make sure there aren’t any issues this is still the engine that fell on it’s head soooo......

I also plugged in an external oil pressure gauge because mine wasn’t reading at all it has a very long line so I’m not sure if it’s super accurate but it’s showing about 20-25 psi at idle which is kinda low
US Army Fort Belvoir

19XX M35 something. Sold......
1972 M151A2
1967 M416
On the hunt for an M1031

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