Good Afternoon,
I am tearing down the L-134 flathead engine in my M-38 so it can go to the machine shop. I've had no trouble with any of it except I am stumped on removal of the oil pump. I removed the flat cover plate and a section of the pump, which fell out. The inner shaft and gear is still inside the block as well as the portion of the casing the flat cover plate bolts to. I'm afraid to get very "persuasive" with it. Help...
Thanks, Dennis
Oil pump removal
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- G-Private First Class
- Posts: 8
- Joined: Mon May 02, 2022 12:35 pm
- Location: San Antonio, Texas
Oil pump removal
Dennis Haas
1952 M-38
1953 M-37
1952 M-38
1953 M-37
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- G-Major
- Posts: 921
- Joined: Thu Aug 07, 2014 9:19 am
- Location: Dorchester County SC
Re: Oil pump removal
Hi Dennis,
Do you have copies of the M38 service manuals?
TM9-1804A, Engine and Clutch
TM9-1804B, Power Train, Body, and Frame
TM9-8012, Operator and Organizational Maintenance
ORD9 SNL G740, Parts Listing with Illustrations
They can be downloaded for free at willysmjeeps.com
Ryan Miller's "M38 Reference Guide" is also an excellent reference.
So is a Willys Universal Jeep Service Manual.
Good luck!
Do you have copies of the M38 service manuals?
TM9-1804A, Engine and Clutch
TM9-1804B, Power Train, Body, and Frame
TM9-8012, Operator and Organizational Maintenance
ORD9 SNL G740, Parts Listing with Illustrations
They can be downloaded for free at willysmjeeps.com
Ryan Miller's "M38 Reference Guide" is also an excellent reference.
So is a Willys Universal Jeep Service Manual.
Good luck!
Ron D
1951 M38
1951 M100
1951 M38
1951 M100
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- G-Lieutenant General
- Posts: 6872
- Joined: Sat Jan 12, 2008 5:25 am
- Location: Tipton,In.
Re: Oil pump removal
The pump is held to the block with 3 - 5/16" nuts or bolts.
Remove these and the pump comes straight out.
The mounting gasket sometimes sticks but once loose, the pump will slide out.
Sounds like you disassembled the pump in place, but the housing is still stuck to the engine block.
There is a timing procedure for installing the pump, to get the distributor positioned correctly, but that comes later if you need help.
Remove these and the pump comes straight out.
The mounting gasket sometimes sticks but once loose, the pump will slide out.
Sounds like you disassembled the pump in place, but the housing is still stuck to the engine block.
There is a timing procedure for installing the pump, to get the distributor positioned correctly, but that comes later if you need help.
Mike Wolford
CJ-2A
VEP GPW
Comm./Inst. SEL
AOPA ( 50 yrs)
EAA ( 49 yrs)
4th Inf. Div. - 5th Inf. Div. - 2nd Armor Div. - CIB
CJ-2A
VEP GPW
Comm./Inst. SEL
AOPA ( 50 yrs)
EAA ( 49 yrs)
4th Inf. Div. - 5th Inf. Div. - 2nd Armor Div. - CIB
- dpcd67
- G-General
- Posts: 11803
- Joined: Mon Jul 25, 2011 3:41 pm
- Location: Iowa
Re: Oil pump removal
Welcome to the G503 forum! First post I see. I am not the real welcoming committee.
RD said it all; and I will reinforce:
Stop what you are doing until you get a complete set of TMs including the SNL, and the Green book, and have read them for a month. Then you can touch a jeep. Otherwise you will damage something, or miss an important piece of PMCS, or higher level of maintenance, in which removing an oil pump falls.
Removing an oil pump is the simplest task you will have on a jeep engine. Buy. new gasket.
RD said it all; and I will reinforce:
Stop what you are doing until you get a complete set of TMs including the SNL, and the Green book, and have read them for a month. Then you can touch a jeep. Otherwise you will damage something, or miss an important piece of PMCS, or higher level of maintenance, in which removing an oil pump falls.
Removing an oil pump is the simplest task you will have on a jeep engine. Buy. new gasket.
U. S. Army 28 years.
Armor Branch
Armor Branch
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- G-Private First Class
- Posts: 8
- Joined: Mon May 02, 2022 12:35 pm
- Location: San Antonio, Texas
Re: Oil pump removal
Thanks gentlemen,
I have a couple of the manuals and a green book but did not have the engine and clutch manual, which I will order. After input from this site and another, and after examining an exploded view provided, I was certain I had all the bolts out and so I put some Marvel Mystery Oil down the shaft from the access plate for tappets and then gently pried the shaft downward. After a nudge or two, she fell right out. This block had been open to the elements for several years so I'm sure it had begun to rust to the block. Thanks again for your knowledge and enjoy your week!
Dennis
I have a couple of the manuals and a green book but did not have the engine and clutch manual, which I will order. After input from this site and another, and after examining an exploded view provided, I was certain I had all the bolts out and so I put some Marvel Mystery Oil down the shaft from the access plate for tappets and then gently pried the shaft downward. After a nudge or two, she fell right out. This block had been open to the elements for several years so I'm sure it had begun to rust to the block. Thanks again for your knowledge and enjoy your week!
Dennis
Dennis Haas
1952 M-38
1953 M-37
1952 M-38
1953 M-37
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