rebuilding engine

This is the place to get help with technical matters concerning your M151 jeep

Moderators: rickf, Mr. Recovery, raymond, moose53

rebuilding engine

Sponsor

Sponsor
 

rebuilding engine

Postby acudanut » November 28th, 2017, 12:35 pm

Needs pictures and specks. (I have never rebuilt a mutt engine before)
Thanks, Mike
acudanut
USMC Gunny
USMC Gunny
 
7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership
 
Posts: 419
Joined: April 12th, 2011, 11:50 am
Location: Land of OZ, KANSAS

Re: rebuilding engine

Postby Horst » November 28th, 2017, 3:35 pm

everything is in the manual (TM). There is no better info available. You need the -34 manual and you find it in our manual section for download. These manuals are very good, step by step and easy to follow, you should still know how to hold a wrench. I did rebuild my 151 engine following the manual, these are pretty simple engines to begin with.

Why are you rebuilding it, what's wrong with it?
Horst

1972 USMC M151A2 w/ROPS and M416
1962 M201 and trailer
1966 Pontiac GTO
1987 Suzuki Samurai
1987 911
1982 Ford E350 Cutaway Skoolie
Gone: 2xM35A2c, Unimog 404S, Hanomag AL28, DKW Munga
User avatar
Horst
Colonel
Colonel
 
10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership
 
Posts: 1451
Joined: December 9th, 2007, 5:21 am
Location: Munich, Germany

Re: rebuilding engine

Postby acudanut » November 28th, 2017, 4:06 pm

Originally, I was going to scrap this engine. It is locked up. But, when I took the oil pan off (had a hole in it) I could not believe my eyes...It has never run and looks brand new from top to bottom.
Upon pulling the valve cover off, I confirmed this, BUT... it looks like who ever put this engine together was in a rush and most of the pushrods where not connected to the valve springs.
So, I pulled the plugs and whoops, one of them was rusted bad.
Looks like one cylinder got water in it and I was hoping to just hone that cylinder out.
BTW, with no plugs in it, no Dist and 4 pushrods removed, lots of Slick 50, WD-40, mystery oil....It still won't turn over.....EEERRRR
Looks like the head is coming off.
acudanut
USMC Gunny
USMC Gunny
 
7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership
 
Posts: 419
Joined: April 12th, 2011, 11:50 am
Location: Land of OZ, KANSAS

Re: rebuilding engine

Postby Horst » November 28th, 2017, 4:11 pm

Entirely disassembling it should not cost you a lot of time. This way you can really check the crank and rod bearings. Takes you probably not more than an hour. When I did mine, it did not remove the intake and exhaust manifold from the head. There is some likelihood to strip bolts and I did not want to mess with sealing the exhaust manifold. But in my case I did know that there were no leaks. So in any case, that is the area I have the most respect for, specifically if it is an old style head. Everything else should come apart easily.
Last edited by Horst on November 28th, 2017, 4:15 pm, edited 1 time in total.
Horst

1972 USMC M151A2 w/ROPS and M416
1962 M201 and trailer
1966 Pontiac GTO
1987 Suzuki Samurai
1987 911
1982 Ford E350 Cutaway Skoolie
Gone: 2xM35A2c, Unimog 404S, Hanomag AL28, DKW Munga
User avatar
Horst
Colonel
Colonel
 
10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership
 
Posts: 1451
Joined: December 9th, 2007, 5:21 am
Location: Munich, Germany

Re: rebuilding engine

Postby acudanut » November 28th, 2017, 4:14 pm

Yeah, I hate to scrap any worthwhile engine that is worth saving. However....I wonder if it's worth the time and money. Seems nobody is wanting these engines. Running or not...
I guess there are not enough Mutts out there these days.
acudanut
USMC Gunny
USMC Gunny
 
7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership
 
Posts: 419
Joined: April 12th, 2011, 11:50 am
Location: Land of OZ, KANSAS

Re: rebuilding engine

Postby rickf » November 28th, 2017, 5:20 pm

I see people looking for these engines every day. Pull the head, like Horst said leave the intake and exhaust on it to save time and lost parts. You are going to find a rusty cylinder I am sure, maybe even a mouse house on top of the piston. Get down in the cylinder with a wire wheel on a drill and get as much of the rust as you can and then you can pry at the teeth on the flywheel with a big screwdriver against a bolt in one of the holes in the block. back and forth and sooner or later it will start to move. More Kroil or PB and keep working it back and forth and soon you will be able to turn it over. It is unlikely that a hone will clean it up but if the rings did not break it may run. I have one that had two real bad cylinders and one more that was iffy. I git it turning and I am going to spray the original head gasket with copper and put it right back on and bolt it down and try it. I have a thread on it here somewhere. I am almost caught up on other jobs so that will be going in soon.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
rickf
General
General
 
10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership
 
Posts: 14682
Joined: November 26th, 2007, 12:28 pm
Location: Pemberton, NJ.

Re: rebuilding engine

Postby acudanut » November 29th, 2017, 12:56 pm

Ok Guys, I will give it a shot. !!
acudanut
USMC Gunny
USMC Gunny
 
7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership
 
Posts: 419
Joined: April 12th, 2011, 11:50 am
Location: Land of OZ, KANSAS

Re: rebuilding engine

Postby Surveyor » November 29th, 2017, 4:50 pm

Good thread to take a look at by Mr. Recovery

viewtopic.php?f=3&t=3348&hilit=rebuild

Don't forget to prime the oil pump! :oops:
1960 M151 Run #1 (working on it)
User avatar
Surveyor
1st Sergeant
1st Sergeant
 
2 years of membership2 years of membership
 
Posts: 403
Joined: November 13th, 2015, 2:56 pm
Location: LA

Re: rebuilding engine

Postby Flyingvan911 » November 29th, 2017, 5:38 pm

My Mutt's engine was the first engine I ever rebuilt. As mentioned, the Tech Manual tells you everything to do. It was a slow but fairly easy process. Just take your time and double check your work as you go. Be detail oriented.
Flyingvan911
Sergeant
Sergeant
 
4 years of membership4 years of membership4 years of membership4 years of membership
 
Posts: 89
Joined: November 4th, 2013, 9:01 pm
Location: Kansas City, MO

Re: rebuilding engine

Postby acudanut » November 30th, 2017, 2:12 pm

Thanks for the link. That is one prized engine.
viewtopic.php?f=3&t=3348&hilit=rebuild
acudanut
USMC Gunny
USMC Gunny
 
7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership
 
Posts: 419
Joined: April 12th, 2011, 11:50 am
Location: Land of OZ, KANSAS

Re: rebuilding engine

Postby acudanut » December 4th, 2017, 3:42 pm

Well, I pulled the head. The head needs machined and cleaned up. The top part of the pistons/cylinders MAY be okay. (the jury is still out on this)..I am getting the engine to move a inch (if that) I will take my time on this process.
Someone really did a shitty redneck job putting this engine together. I guess I am going to go deep into this engine. I don't trust any bearings in it AND, GUESS What...No head gasket was on it and the exhaust and intake had no gaskets either (with bolts missing)....Who would do this ???? EEERRRRR
acudanut
USMC Gunny
USMC Gunny
 
7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership
 
Posts: 419
Joined: April 12th, 2011, 11:50 am
Location: Land of OZ, KANSAS

Re: rebuilding engine

Postby rickf » December 4th, 2017, 7:34 pm

Someone who took it apart to see what it was and put it back together so as not to lose the parts. I do it all the time.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
rickf
General
General
 
10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership
 
Posts: 14682
Joined: November 26th, 2007, 12:28 pm
Location: Pemberton, NJ.

Re: rebuilding engine

Postby acudanut » December 4th, 2017, 10:57 pm

Rick. I may have your old engine. lol
acudanut
USMC Gunny
USMC Gunny
 
7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership7 years of membership
 
Posts: 419
Joined: April 12th, 2011, 11:50 am
Location: Land of OZ, KANSAS

Re: rebuilding engine

Postby rickf » December 5th, 2017, 9:28 am

Nah, I never get rid of anything. Ask Horst, He was just here and saw all my junk. :roll: :lol: :lol: Want a small block Chevy? I have several, a couple just like you described, minus the rust. I spray them down with Fluid Film before putting them back together.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
rickf
General
General
 
10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership10 years of membership
 
Posts: 14682
Joined: November 26th, 2007, 12:28 pm
Location: Pemberton, NJ.


Return to Technical Discussion

Who is online

Users browsing this forum: No registered users and 1 guest

Customization by G838.org