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Thread: rover v8 crankshaft break

  1. 19th May 2013, 09:16 PM #1
    mateusz
    mateusz is offline Master
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    rover v8 crankshaft break

    hi gents ive broken my v8 3.5 crankshaft. not sure what happened but sure ****ed off! i suspect the mains bolts were re used by previous owner in a rebuild. All mains bearings appear to be good but centre main bolts snapped in block. can this block be reused with a new crank and perhaps a stud kit? how is a stud kit better than original bolts? thanks in advance

    matt
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  2. 20th May 2013, 06:27 AM #2
    chazza
    chazza is offline YarnMaster
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    You may be able to re-use the block but the alignment of the main bearings will probably need checking - speak to a good engine-reconditioner.

    Studs eliminate the stretching of the top threads in the hole, which causes the flat face of the object to develop a bump. The stretching can also be eliminated by having the top threads counter-bored away and continue using bolts,

    Cheers Charlie
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  3. 20th May 2013, 06:36 AM #3
    PhilipA
    PhilipA is offline Swaggie Subscriber
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    Usually a broken crank, and or broken bolts are due to cap"shuffle" which in turn is caused by the Block registers wearing.

    This is an age old RV8 problem and can be exacerbated by incorrect assembly of the caps into the block. they have to be "snapped" into place.

    From all I have read it is unwise to use the block again.
    Regards Philip A
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  4. 20th May 2013, 08:26 AM #4
    bee utey's Avatar
    bee utey
    bee utey is offline AT REST
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    It happens, whatever the reason.

    http://www.aulro.com/afvb/technical-...rankshaft.html

    Don't try to reuse the engine, 3.5s can't be all that hard to find.
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