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Thread: My thanks to Scouse...

  1. 3rd April 2015, 07:15 PM #11
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    Never heard of re torquing a p38 before.....wouldn't it be a nightmare to get to the heads in a Bosch Thor motor to re torque and put back together ?
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  2. 3rd April 2015, 07:29 PM #12
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    Quote Originally Posted by 33chinacars View Post
    And there is your possible problem . Heads may have needed a re-torque after a settling in period.

    Some years ago got a change over engine ( Holden 202 ) was told it had to have the head re-torqued every 5000 kms. ??? Strange but true.
    No need for re-torqueing these days with modern gaskets & stretch bolts.


    The head bolts on the P38 (and D2) are torqued initially then angle torqued.
    Scott
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  3. 4th April 2015, 11:02 AM #13
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    The 2nd 90 degrees Is the tough one!

    Gary
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  4. 4th April 2015, 11:07 AM #14
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    Quote Originally Posted by mtb_gary View Post
    The 2nd 90 degrees Is the tough one!

    Gary

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  5. 5th April 2015, 07:04 AM #15
    TheTree
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    Seems like a very quick failure of those head gaskets!

    Mine motor was rebuilt 50K ago and I have an issue with low manifold vacuum, I am hoping it's not the inlet manifold gasket.

    Sounds like it's worth checking the torque on those head bolts

    And well done Scouse

    Steve
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  6. 5th April 2015, 07:27 AM #16
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    I'm not sure why but the rebuilder used early model head bolts, not the later stretch (torque to angle) bolts.

    Top: Stretch (TTA) bolts

    Bottom: Pre-early bolts

    Last edited by p38arover; 9th April 2015 at 09:52 AM.
    Ron B.
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  7. 5th April 2015, 08:03 AM #17
    TheTree
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    General opinion seems to be that the ARP Stud kits are the mutts nuts

    Steve
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  8. 5th April 2015, 08:09 AM #18
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    Why are studs better than bolts?
    Ron B.
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    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



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  9. 5th April 2015, 08:38 AM #19
    TheTree
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    Ron

    I believe it's mainly to do with being able to torque them more accurately and easily

    Head Bolts vs. Head Studs

    Steve
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  10. 5th April 2015, 08:54 AM #20
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    I also think they help reduce possible damage on the aluminium block. Instead of a turning & pulling force on the block, it reduces to a pulling force when studs are used.
    Scott
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