M37 Registry Count 1071 Trucks Registered!
g741.org
M37 Discussion Forum
M37 Registry
Latest Entry


1952 M37
Bill in North Carolina

Home Pics Parts list Production dates Production changes Contract numbers Tech Manuals Specs MilSpec Docs Links

Just another engine build thread. Sort of.

Build and Restoration Threads Belong Here

Moderators: Cal_Gary, T. Highway, nivek, robi, Monkey Man

Re: Just another engine build thread. Sort of.

Postby just me » Mon Jun 19, 2017 1:27 pm

I'm sure it doesn't come in the kit because only the military used the bolt on pipe. I have a drawer full of gasket material. Even some real Garlock. Since my previous hobbies of old tractors and hit and miss engines required me to make my own gaskets for everything, I got reasonably proficient at cutting them by hand.
"It may be ugly, but at least it is slow!"
just me
SFC
SFC
 
Posts: 717
Joined: Fri Nov 28, 2014 4:25 pm

Re: Just another engine build thread. Sort of.

Postby just me » Sat Jun 24, 2017 6:27 pm

Three steps forward and two steps back. The oil pan is leaking. Not the gaskets. The pan. I get to remove enough stuff to flop the engine e on its side and pull the pan. I may weld a new bottom in it or just try and locate an NOS one.
"It may be ugly, but at least it is slow!"
just me
SFC
SFC
 
Posts: 717
Joined: Fri Nov 28, 2014 4:25 pm

Re: Just another engine build thread. Sort of.

Postby Elwood » Sun Jun 25, 2017 1:49 am

Leaking pans must be fairly common. I have two flathead six oil pans that have rusted through in the bottom. One of them hadn't started leaking yet since it was so full of sludge that it had essentially self-sealed. I was cleaning it in the parts washer when I realized I could see through the sump. :shock:

Must be from neglect (failure to change the oil regularly) or long periods of just sitting. Any water in the engine oil settles to the bottom and eventually rusts through the pan from the inside out.

I recently disassembled the stock fuel pump from one of these same engines, and the lower cover of the vacuum side was rusting through from the inside. Not surprisingly, it too was full of engine oil.
“When a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, IT IS THEIR RIGHT, IT IS THEIR DUTY, TO THROW OFF SUCH GOVERNMENT...” -Declaration of Independence, 1776
Elwood
SFC
SFC
 
Posts: 674
Joined: Mon Oct 24, 2011 9:34 am
Location: Water Winter Wonderland

Re: Just another engine build thread. Sort of.

Postby just me » Fri Jul 07, 2017 6:25 am

Not posting much, but things have progressed. Got a new pan from John and some odds and ends from he and Jens. Fabricated all the lines and just done a bunch of fiddly bits. The carb is off and I'm taking it to the local plater to have it passivated and chromated. Then rebuild it. I'm hoping that helps with the prevention of white rust inside.
I've also pulled the starter and generator for freshening up.
I've got everything for the trans rebuild but the special snap ring. The case is in the soup right now. Every day a little bit.
right.jpg
right.jpg (74.1 KiB) Viewed 95 times

tubes.jpg
tubes.jpg (84.75 KiB) Viewed 95 times

left.jpg
left.jpg (80.5 KiB) Viewed 95 times
"It may be ugly, but at least it is slow!"
just me
SFC
SFC
 
Posts: 717
Joined: Fri Nov 28, 2014 4:25 pm

Re: Just another engine build thread. Sort of.

Postby Elwood » Fri Jul 07, 2017 6:51 am

Looking good.

Interesting routing on the vent line between the air horn and the oil filler tube. Mine was more horizontal, routed above the fuel line into the carb bowl. Is there a reason for the extra fittings coming down from the air horn before going across the head to the filler tube?

Did you repair your oil pan, or find an NOS one?
“When a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, IT IS THEIR RIGHT, IT IS THEIR DUTY, TO THROW OFF SUCH GOVERNMENT...” -Declaration of Independence, 1776
Elwood
SFC
SFC
 
Posts: 674
Joined: Mon Oct 24, 2011 9:34 am
Location: Water Winter Wonderland

Re: Just another engine build thread. Sort of.

Postby just me » Fri Jul 07, 2017 11:03 am

That was how the existing piping was run. I don't have a tube bender that size, so I just see the original tube. I would have liked to route it differently, but it works.
New oil pan from MWM.
I used a later air horn than the original for convenience in plumbing. Now I have one each new and original air horns spare in the swap meet pile.
"It may be ugly, but at least it is slow!"
just me
SFC
SFC
 
Posts: 717
Joined: Fri Nov 28, 2014 4:25 pm

Re: Just another engine build thread. Sort of.

Postby T. Highway » Tue Jul 11, 2017 4:14 am

Looks like the engine is coming together very nicely. I always enjoyed the small detail work parts of my projects.

Side note: I have seen many different vent line configurations over the years. I will post up pictures that I took last weekend of a 52 M37 that has a configuration that I have never seen and it looks to be stock with fording shroud. (This will be a new post in the tech section)

Bert
1952 M37 W/W Rebuild @ 59% complete
Engine rebuild @ 95% complete
1985 M1009, 1990 M101A2, 2008 M116A3 Pioneer tool trailer
MVPA # 24265
NRA Life Member
NRA Cert. Personal Protection Pistol Instructor
NRA Cert. RSO
Class III RSO/KCR
T. Highway
Moderator
Moderator
 
Posts: 1617
Joined: Thu Jul 09, 2009 4:57 am
Location: S.E. Wisconsin, USA, Earth

Re: Just another engine build thread. Sort of.

Postby just me » Sat Jul 22, 2017 7:24 pm

No real progress for the last two weeks. Still waiting on the carb bodies to come back from the plater so I can build one. The transmission has been a butt kicker with little odd difficulties and parts and availability problems. Bagged and stowed all the M37 projects because I'm going to take at least 3 weeks off from the truck. Have a bit to do on the M38 and will be doing a road trip with it and Luke's MB. Maybe, just maybe I'll have the rest of the stuff to finish the M37 when we get done and I'll be able to get back to productive work.
"It may be ugly, but at least it is slow!"
just me
SFC
SFC
 
Posts: 717
Joined: Fri Nov 28, 2014 4:25 pm

Previous

Return to Builders Blog

Who is online

Users browsing this forum: Bing [Bot] and 1 guest