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Thread: Help! Stuck headbolt on V8

  1. 21st July 2023, 06:58 PM #11
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    What a mission. One side done. Looks like a head skim would be a good idea and one of the valves looks like it isn't sealing...so hopefully they fix that too.

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  2. 21st July 2023, 10:31 PM #12
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    Depending on how much you need to take off or has previously been taken off the head, you may need to machine the inlet manifold.
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  3. 22nd July 2023, 02:18 PM #13
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    Second side was much easier.

    2001 Disco D2 V8
    2008 Defender 90
    2013 Disco SDV6
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  4. 22nd July 2023, 02:41 PM #14
    BradC
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    Out of interest, what method(s) did you apply to get that tough bolt out?
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  5. 22nd July 2023, 02:58 PM #15
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    Quote Originally Posted by BradC View Post
    Out of interest, what method(s) did you apply to get that tough bolt out?
    Heat (but 2deg C so ineffective), WD40 (ineffective as couldn't get to threads), hammer and brass punch (ineffective?). 12 sided 5/8 socket cheap ones and a sidchrome (ineffective and ruined), air and battery rattle guns tightening and untightening (ineffective?), Impact socket breaker bar (750mm) and tirfor handle fully extended 1.5mish) and elbow grease (effective).

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    2001 Disco D2 V8
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  6. 22nd July 2023, 03:52 PM #16
    PhilipA
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    When reassembling use thread sealant. I have a tin of “Holden” three sealant that I bought after being recommended on this site AFAIR.
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  7. 22nd July 2023, 04:55 PM #17
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    Mate I would spring for a set of ARP head studs if you can. Cheers
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  8. 22nd July 2023, 05:56 PM #18
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    Quote Originally Posted by ozscott View Post
    Mate I would spring for a set of ARP head studs if you can. Cheers
    With the engine in place can you get the heads over the studs in a D2?
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  9. 22nd July 2023, 07:07 PM #19
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    Yes mate. Works nice like. Cheers
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  10. 22nd July 2023, 07:13 PM #20
    Woolly
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    Not sure if this would apply to the Rover V8, but I have an old car with an alloy head held down with steel studs. The first time I attempted to remove the head, the nuts came off easily, but I could not shift the head due to corrosion between the studs and the head, so if you do go for studs, some sort of anti seize precautions may be needed.
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