Main Cap Torque Figures Bbc 4-bolt Mark Iv

Discussion in 'Rotating Assemblies' started by labdad, Sep 2, 2020.

  1. labdad

    labdad Member

    Okay, seems everywhere I see a table of torque values it shows 110 pounds for the main caps, except in my 1988 Haynes manual which has an asterik by the Main Bearing Cap Bolts line, leading to the note below indicating “*Outer bolts on 4 bolt caps 65”

    Old info that has been updated? Everyone else just feels 110 is better? This stuff drives me crazy. Need to know before I proceed. Thanks.
     

    Attached Files:

  2. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

  3. labdad

    labdad Member

    Okay, 110 it is. The question remains how the 65 figure for the outside bolts was derived. I’ll dig into it when I get free few minutes, in about 2086!
     

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