85 Or 100 ft/lbs?

Small Block Mopar Engine

  1. SpeedThrills

    SpeedThrills Well-Known Member

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    Regarding LA360 main cap bolts; I see in several places that the torque should be 85ft/lbs. However, in Larry Shepard's, "How To Hot Rod Small Block Mopar Engine's", he states 100.

    And the truth is...??
     
  2. jos51700

    jos51700 Well-Known Member

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    Depends on bolts (new/used/ARP/Chinese), main caps, lubed or no, etc.

    And you have....______?
     
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    • RustyRatRod

      RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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      I've seen 105 in some books.
       
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      • krazykuda

        krazykuda Well-Known Member FABO Gold Member How-To Section Editor

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        We did ours to 85 ft * lbs like the service manual says...
         
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        • PRH

          PRH Well-Known Member

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          I do 85 with a drop or two of oil, using stock bolts.
           
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          • Plymouth 65

            Plymouth 65 Floorable Deplorable

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            Unless you've had the block/caps torqued and line bored to a different specification I'd go with the 85 ftlbs defined in the service manual. 65'
             
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            • SpeedThrills

              SpeedThrills Well-Known Member

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              I'm reassembling a used engine (new to me). I have no idea what bolts they are. It's wrapped up for the night, I'll look tomorrow.

              Everything has been very good so far. It has KB190's, MP 292 cam, ported 915's w/ 2.02 intakes, Crane gold rockers.
              Everything measured good. I put bearings and rings in it.
              I have to look over the heads (it's been a while since I took it apart), put them on and degree the cam.
               
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              • SpeedThrills

                SpeedThrills Well-Known Member

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                IMG_2591.JPG IMG_2593.JPG
                There are six of the regular hex head, and four of the windage tray versions.

                Radial lines would indicate gr 8. I don't know if the circle indicates anything. I have found torque values of 53 (dry), 80, 80 (dry), 90, 100 (lubed), 110 (lubed), 105, 107. All for 1/2-13. Then I stopped looking.

                Are these stock bolts?
                 
              • j par

                j par Well-hung Member

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                Yes...
                 
              • 318willrun

                318willrun Stomper 4x4... we kept energizer in business

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                85 lbs and forget it.
                 
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                • SpeedThrills

                  SpeedThrills Well-Known Member

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                  Thanks

                  I agree. Thanks
                   
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