Joined: Mar 10, 2013 Posts: 54 Location: Stevensville, Montana
Posted: Wed Mar 31, 2021 10:32 am Post subject: Exhaust Manifold Studs
I need to know if the studs go into the water jacket. I’m getting coolant leaking out the nuts at #1 . I’m planning on pulling the valve cover and checking torque on the head bolts. This engine was rebuilt by the last owner. I do not know how long ago or how many miles he put on it. The engine looks like it was rebuilt yesterday. I can’t ask the owner because I bought it from his estate and they have no idea. _________________ 1951 M37 WOW, 1953 M37 WOW, 1954 M37 WOW, 1953 M38-A1, 1954 M38-A1, 1964 M151-A1, 1967 M151-A1, 1968 M151-A1, 1978 M151-A2, 1989 M35A2C, 1965 M416, 1966 M416, 1967 M416
MSgt, USAF Retired 1/84-10/05
If he had put permatex on the studs before he installed them it wouldn't leak.
If it was mine, I would pull them and do that. _________________ M38 23100 June 51
M38 34523 Sep 51
M606/CJ3B 1964 Kaiser 57348 118458
M37B1 1963
Willys MB 1944
Ford GPW 1942
Dodge WC63 1943
Dodge Power Wagon WM300 1967
Plymouth Barracuda, 1973, 340 4 barrel
All ground up restored by me.
Lots of others.
Joined: Mar 10, 2013 Posts: 54 Location: Stevensville, Montana
Posted: Thu Apr 01, 2021 12:54 pm Post subject:
RonD2 wrote:
Paragraph 118 on page 132 of the F134 Engine TM9-8015-1 says yes.
That manual is free in the downloads section.
Good luck!
It took me a while to find them because they aren't in the download section under M38/M38A1 file section. I skipped right past the section that states, "manuals" because I thought they were all misc. manuals not related to the M38A1. Anyway thanks for the direction and now I will be spending the day downloading the rest of them. _________________ 1951 M37 WOW, 1953 M37 WOW, 1954 M37 WOW, 1953 M38-A1, 1954 M38-A1, 1964 M151-A1, 1967 M151-A1, 1968 M151-A1, 1978 M151-A2, 1989 M35A2C, 1965 M416, 1966 M416, 1967 M416
MSgt, USAF Retired 1/84-10/05
Joined: Mar 10, 2013 Posts: 54 Location: Stevensville, Montana
Posted: Thu Apr 01, 2021 12:57 pm Post subject:
dpcd67 wrote:
If he had put permatex on the studs before he installed them it wouldn't leak.
If it was mine, I would pull them and do that.
I read several threads about the permatex so I will go over those again and find the one everyone recommends. Thanks for the heads up. _________________ 1951 M37 WOW, 1953 M37 WOW, 1954 M37 WOW, 1953 M38-A1, 1954 M38-A1, 1964 M151-A1, 1967 M151-A1, 1968 M151-A1, 1978 M151-A2, 1989 M35A2C, 1965 M416, 1966 M416, 1967 M416
MSgt, USAF Retired 1/84-10/05
Joined: Mar 10, 2013 Posts: 54 Location: Stevensville, Montana
Posted: Tue Apr 06, 2021 1:41 pm Post subject:
I pulled the studs and they were bare. Also discovered that two studs were missing. So is there a civilian part number for the exhaust studs and gasket? I’m going to look in the parts book and see if it calls out the dimensions of the studs. _________________ 1951 M37 WOW, 1953 M37 WOW, 1954 M37 WOW, 1953 M38-A1, 1954 M38-A1, 1964 M151-A1, 1967 M151-A1, 1968 M151-A1, 1978 M151-A2, 1989 M35A2C, 1965 M416, 1966 M416, 1967 M416
MSgt, USAF Retired 1/84-10/05
Joined: Oct 02, 2014 Posts: 1006 Location: South Carolina, Dorchester County
Posted: Tue Apr 06, 2021 7:16 pm Post subject:
Hi Cobra,
Wow. It's hard to imagine that coolant wasn't also gushing out of those missing <2 out of 5 total> stud holes? What's with that?
I didn't look in the manual for you this time, but many of the reliable and venerable vendors of our military jeep parts can hook you up with the proper studs and gaskets......MWM, RFJP, BMJP, QTM, and AJP come to mind.
Those are very common parts and relatively inexpensive. Might even be able to buy them at your local auto parts store. Tell them it's for a Willys F134 motor.
Good luck! _________________ Ron D.
1951 M38 Unknown Serial Number
1951 M100 Dunbar Kapple 01169903 dod 5-51
“The only good sports car that America ever made was the Jeep."
--- Enzo Ferrari
Joined: Mar 10, 2013 Posts: 54 Location: Stevensville, Montana
Posted: Fri Apr 09, 2021 3:14 pm Post subject:
RonD2 wrote:
Hi Cobra,
Wow. It's hard to imagine that coolant wasn't also gushing out of those missing <2 out of 5 total> stud holes? What's with that?
I didn't look in the manual for you this time, but many of the reliable and venerable vendors of our military jeep parts can hook you up with the proper studs and gaskets......MWM, RFJP, BMJP, QTM, and AJP come to mind.
Those are very common parts and relatively inexpensive. Might even be able to buy them at your local auto parts store. Tell them it's for a Willys F134 motor.
Good luck!
RonD2,
I checked the manual and I was incorrect about the missing studs. The holes I thought should have studs are actually extra threaded holes in the block. The front hole is for the fording cable bracket. Not sure about the aft hole. I feel better knowing that the manifold is probably okay and not warped as it would have been if studs were missing. Another fun fact is that the studs had no rust on them so this engine can't be too old of a build. I called John at MWM to get parts coming my way. _________________ 1951 M37 WOW, 1953 M37 WOW, 1954 M37 WOW, 1953 M38-A1, 1954 M38-A1, 1964 M151-A1, 1967 M151-A1, 1968 M151-A1, 1978 M151-A2, 1989 M35A2C, 1965 M416, 1966 M416, 1967 M416
MSgt, USAF Retired 1/84-10/05
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