valve guide removal

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
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pdoyon
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valve guide removal

Post by pdoyon » Sun Sep 17, 2017 7:58 pm

Guys,

One more question. Should the valve guides be removed before the block is cleaned, if so is their removal problematic.

Paul
1944 GPW


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Re: valve guide removal

Post by Wolfman » Mon Sep 18, 2017 4:24 am

Don't know that it matters. Before or after.
Easy enough to do, since you have the engine disassembled.
Come in from the bottom, through the lifter bore with a drift and drive the guide out , toward the cyl. head side.
I have a driver, like a flat punch. The O.D. is a little smaller than the guide O.D. and it has a pilot on the end that goes into the guide to keep the driver centered on the end of the guide.
Don't know how you will have the block cleaned but if it will be thermal, the heat, from the cleaning operation will loosen the guides a bit. Make them come out easier.
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

Joe Gopan
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Re: valve guide removal

Post by Joe Gopan » Mon Sep 18, 2017 4:47 am

Thanks Mike.
Do not have a stripped engine. Just adding to my assortment of professional Jeep repair tools from Factory, Gov't Surplus and the handy other types offered by various popular tool manufacturers that make working on Jeep a pleasure.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO

Wolfman
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Re: valve guide removal

Post by Wolfman » Tue Sep 19, 2017 4:32 am

I have successfully pulled guides in an assembled engine with an all thread 3/8 rod.
Remove the valves.
Put the rod through the guide. Install a nut, that has the corners rounded off so it will go through the block as the guide comes out, on the bottom.
Put a heavy plate over the rod, on top, that will lay on the block to pull against, followed by a couple heavy flat washers and another nut to do the pulling.
Be sure all is well oiled and pull away.
A grade 5 threaded rod and nuts is better. Grade 3 can't take it.
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

Joe Gopan
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Re: valve guide removal

Post by Joe Gopan » Tue Sep 19, 2017 5:14 am

I avoid the threaded rod pulling trick with GPW-too delicate, especially when the GPW guide is stubborn. Have better luck driving them with the special tools.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO

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pdoyon
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Re: valve guide removal

Post by pdoyon » Tue Sep 19, 2017 7:45 pm

Once again thank you to all for your information, much appreciated

Paul
1944 GPW

Wolfman
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Re: valve guide removal

Post by Wolfman » Wed Sep 20, 2017 4:42 am

Note the rags packed around the lifters in the first picture.
They are there for a reason.
Plugs the holes so when you drop a spring retainer keeper during removal or installation, it does not end up in the oil pan. :twisted:
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

Joe Gopan
Jeep Heaven
Posts: 49841
Joined: Sun Mar 02, 2008 12:37 pm
Location: Proving Ground

Re: valve guide removal

Post by Joe Gopan » Wed Sep 20, 2017 6:52 am

The rags also help avoid any dust from the valve seat grinding operation from getting into the crankcase.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO


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