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L head torque specs |
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neptco19 
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Joined: 20 July 2005 Location: Athens, GA Status: Offline Points: 73 |
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 Topic: L head torque specsPosted: 08 Mar. 2006 at 11:49am |
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Looking for the specs for the head and also the bolt tighting pattern. Thanks.
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Jason
'48 CJ2A '02 TJ |
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sean
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Posted: 08 Mar. 2006 at 8:34pm |
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Jason:
The manuals call for 60-70 ft-lbs for bolts, 60-65 ft-lbs for studs. Sean Edited by sean - 22 June 2008 at 3:17pm |
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p3ferris
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Posted: 08 Mar. 2006 at 8:44pm |
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I am guessing that it is for the 48 cj2a with a L134. cylinder head bolts 65 to 75 ft.lbs cylinder head nuts 60 to 65 ft. lbs. front to back 15----9----5----7----13 10----3----1----2----12 11----6----4----8----14 hope this helps
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Ed
cj2a lefty |
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p3ferris
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Posted: 08 Mar. 2006 at 8:56pm |
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I checked 3 repair manuals from 1948-49 and the torques are as stated by me above. Since there were differences I thought I had better triple check.
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Ed
cj2a lefty |
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neptco19
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Posted: 08 Mar. 2006 at 9:22pm |
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Thanks guys.
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Jason
'48 CJ2A '02 TJ |
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Paul_B
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Posted: 09 Mar. 2006 at 6:56am |
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If I can also add a bit of advice, I changed my head gasket about two weeks ago (see earlier thread) and used above torques setting. I ended up stripping a thread on a block socket because I oiled the thread (which give a flase and higher torque).
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sean
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Posted: 09 Mar. 2006 at 10:56am |
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Ed:
Which manuals did you find your 65-75 torques in? A '45 manual (which is stud only) calls for 60-65 A '53 manual calls for 60-70 for bolts A '65 manual calls for 60-70 for bolts Sean |
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p3ferris
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Posted: 09 Mar. 2006 at 8:23pm |
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Jeep service and repair Motor Age flat rate Motors auto repair 1948 |
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Ed
cj2a lefty |
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p3ferris
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Posted: 09 Mar. 2006 at 8:43pm |
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I just looked them up again. BOOK 1. page 186 2.page 998 3.page 773 Sean, I used these for my 48 and I had no problem |
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Ed
cj2a lefty |
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neptco19
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Posted: 10 Mar. 2006 at 7:33am |
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Well I went to 65 and had no leaks. So I guess that'll work
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Jason
'48 CJ2A '02 TJ |
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sean
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Posted: 10 Mar. 2006 at 12:22pm |
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Ed:
So none of these are Willys manuals? Unusual specs. I just checked my 2 Motors manuals, and Chiltons manual. I can find nothing that says 65-75. All three list 60-65 for years 45 through 49. Then beginning 1950, they call for 60-70. All of which jive with the Willys manuals. I think I'd stick with Willys official specs. Sean |
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sean
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Posted: 10 Mar. 2006 at 12:24pm |
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Now for my own curiosity,
Has anyone ever heard of a torque spec for the stud-to-block? Sean |
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Ritt
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Posted: 10 Mar. 2006 at 2:59pm |
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We build compressors & vacuum pumps here for submarine service and we just shoulder the stud. I have to say our mechanic uses an old hand pneumatic stud driver and a #3 fit for the hole (don't know what Willys used for fit ~2 is std.). No torque, but I think after 30 years, he goes by "feel" Hope this helps |
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Rit
1948 2A, "RAISIN COOKIES THAT LOOK LIKE CHOCOLATE CHIP COOKIES ARE THE MAIN REASON I HAVE TRUST ISSUES" |
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sean
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Posted: 11 Mar. 2006 at 10:55am |
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Ritt:
Lacking a torque spec, I figured I'd just have to make sure they're good and tight, but was hoping to find a torque spec. I've worked on studded assemblies before, where if the stud wasn't tightened enough to begin with, it would turn some more when you torqued the nut on it. And if the loctite or other sealant has already set, then this breaks the seal. I want to avoid that. Thanks |
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merc_man
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Posted: 23 Jan. 2013 at 2:51am |
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I loosend a few of the head bolts a while back to take off a few of the things that bolt to the head. Should I take them all loose and retighten in order?
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1947 CJ2a |
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garage gnome
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Posted: 23 Jan. 2013 at 2:53am |
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No. You can just tighten them up. Your head gasket has already be torqued and squashed.
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Nate
1953 3A, 1949 3A, 1947 2A, 1918 IHC Titan 10-20, 1905 IHC Famous, other hit n misses |
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JeepRoger
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Posted: 23 Jan. 2013 at 6:47am |
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Sean... The 1952 Willys Service Standards booklet, pg 34, says "Cylinder head screws - 60-70ft lbs." Not quite sure what they are referring to. I see nothing in there that specifies torques for cylinder head studs or studs-to-block. And as you already pointed out, "Cylinder head stud nuts - 60-70ft lbs". Text also says "Recheck with engine water at 150°F" (and this subject has come up quite a bit). ...R
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Roger in California
'46 CJ2A 38503 '47 CJ2A 142084 '46 T3C Bantam trailer |
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Giddy Up
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Posted: 24 Jan. 2013 at 2:02pm |
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Excuse my ignorance; but does it mean I have to torque the nuts, start the engine and let it run and then re-torque the nuts while the engine is about 150F?
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1946 Willys CJ2A #41921
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sean wrote:
. If the fit doesn't feel quiet right in a service job or rebuild, he will use a Loctite (sealer type) to be sure of a good hold (on surface ships).