EARLY / LATE HEAD GASKET

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
r w devon
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EARLY / LATE HEAD GASKET

Post by r w devon » Sat Dec 02, 2017 2:36 pm

Hello all

I'm fitting a wartime head and have a 'later' gasket available ( smaller section between #2 and #3 )
From a trawl through earlier post , I believe the later type was for both pre and post 1945 engines whilst the early type was obviously no good for later machines.
Some expressed the opinion that they would prefer to use ONLY an early gasket with an early head.
I couldn't find any info from those having used the universal gasket on wartime heads.

What are your experiences of using a late gasket on an early head ?

Are there any downsides ? ( poor combustion etc)

Should I hang out for an early gasket if available ?

Thanks all
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Re: EARLY / LATE HEAD GASKET

Post by bantamj » Sun Dec 03, 2017 1:23 am

If you have a gasket from a reliable brand your good to go.
But always put it on the block deck and inspect if the coolant passages are free and the gasket does not protrude the cylinder bore.
If there would be a few coolant passages in the block that are not present in the gasket, don't worry.
Early blocks have passages that disapeared in later production blocks as they caused cracks and were found unnecessary.
Most likelly these passages will not be present in the head either.

Good luck,
BJ

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Re: EARLY / LATE HEAD GASKET

Post by Ben Dover » Sun Dec 03, 2017 11:18 am

7267B FEL-PRO is a good match for early heads.
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Re: EARLY / LATE HEAD GASKET

Post by r w devon » Mon Dec 04, 2017 1:06 pm

Thanks BJ
Hoping to pop it on tomorrow .
Both faces are newly machined, new studs, nice clean threads, thread sealant ready and will fit the fibre with metal insert gasket dry.
What could possibly go wrong !

Cheers
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Re: EARLY / LATE HEAD GASKET

Post by r w devon » Mon Dec 04, 2017 1:12 pm

Image
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Re: EARLY / LATE HEAD GASKET

Post by bantamj » Mon Dec 04, 2017 1:31 pm

Looks to be a nice WOF gasket 8)
One thing you need to do is properly torque the head.
In the factory all nuts are torqued simultaniously and the head gasket settles in one move.
We have to do it with a torque wrench, nut after nut.
Result is that you need to re-torque over and over untill the head gasket is settled properly.
As long as the nuts turn before the wrench click's off, another torque session is needed...even if they only turn a seccond of a degree.
After start up and the engine brought to working temperature, the head needs to be re-torqued again.
Same here, re-torque untill the nuts don't budge anymore.
Before the engine has been running torque the nuts to 70 feet pounds.
Start it up and run it to 180°F and shut off.
Re-torque when the temp has dropped to 170°F at 60 feet pounds.
For bolts you can ad 5 feet pounds as the thread is course.

Good luck,
BJ.

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Re: EARLY / LATE HEAD GASKET

Post by Ben Dover » Mon Dec 04, 2017 5:16 pm

Above gasket appears to be similar to Fel-Pro-7285B' the Fel-Pro 7267B has a wider section with more area between #2 and #3 than the 7285B.
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Re: EARLY / LATE HEAD GASKET

Post by artificer » Mon Dec 04, 2017 5:55 pm

Cylinder head needs to be torqued/tensioned/tightened in the correct sequence TM 10 1513 0100 21 Fig 9 or download off www.jeepdraw.com
John GIBBINS Member Institute of Automotive Mechanical Engineers [Ret], ASE Master Medium/Heavy Truck & Auto Technician USA -2002 Licensed Motor Mech NSW MVIC 49593 Current 2015
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.

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Re: EARLY / LATE HEAD GASKET

Post by r w devon » Thu Dec 07, 2017 11:13 am

I know we've all seen this before ...
But thanks to all ,
And here's some feedback
Image
Image
Image
Image
Image

Cheers all
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Re: EARLY / LATE HEAD GASKET

Post by bantamj » Thu Dec 07, 2017 11:48 am

Very clean and nice work!

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Re: EARLY / LATE HEAD GASKET

Post by Ben Dover » Thu Dec 07, 2017 11:54 am

The late gaskets work OK, not all current manufacturers offer a choice. Earlier style does have more gasket material in the center.
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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Re: EARLY / LATE HEAD GASKET

Post by bantamj » Thu Dec 07, 2017 12:34 pm

The original style head gaskets did not have a steel edge like the modern do, except a small section where the cylinder bores are close to each other.
F head gasket.jpg
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Re: EARLY / LATE HEAD GASKET

Post by jeepfinger » Thu Dec 07, 2017 1:04 pm

Hi BJ,

Nice Ford gasket, did it come out of one of the Valve service gasket kits? I remember using one, with some gasket sealer :roll: Needless to say, didn't take long to blow :o

Dave
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Re: EARLY / LATE HEAD GASKET

Post by Ben Dover » Thu Dec 07, 2017 4:11 pm

I still have some of the above WWII era head gaskets that were supplied in MB/GPW A-1537/FM-GPW 18387 Valve Grind Kits. They were manufactured by both Detroit Gasket and Victor. Have been installing them in Jeeps with early heads since the 50's. They are reliable as long as the head is not distorted and the permanent anti freeze is flushed every 3-5 years. Prestone goes acidic and causes corrosion which affects the gasket.
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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Re: EARLY / LATE HEAD GASKET

Post by 1943Willysgpw » Thu Dec 07, 2017 7:21 pm

What are your thoughts of an all copper head gasket?
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1942 GTB 136166 DoD 9-18-42
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