possible solution for main bearing for engine.

Discussion in 'Gen 1 & 2 - Engine, Exhaust, Drive Line & AC syste' started by probe_racer, Jun 12, 2012.

  1. probe_racer

    probe_racer Active Member

    Joined:
    Nov 7, 2009
    Messages:
    147
    Likes Received:
    58
    Location:
    california
    hi guys, i came across a website that has a post saying a guy figured out how to use different bearing sets to mix and match the parts and would work with sho crankshaft.

    has anyone else tried this route?? opinions on this??

    http://www.speedtalk.com/forum/viewtopic.php?f=1&t=29491
     
  2. jelloslug

    jelloslug Digital

    Joined:
    Aug 29, 2002
    Messages:
    4,204
    Likes Received:
    385
    Occupation:
    Mechanical Engineer
    Location:
    Greenville, SC
    Home Page:
    Seem plausible.
     
  3. zak

    zak SHO Member

    Joined:
    May 15, 2002
    Messages:
    1,578
    Likes Received:
    378
    Location:
    east of Hartford
    Home Page:
    Looks like they are substituting Vulcan bearings, Sealed Power 7011MA or Clevite MS1702P, which would require line boring the block and caps to accept the 0.032 inch larger diameter. Not very many places do line boring.

    The main bearings don't wear much on these engines, many just reuse them (check crank front to back movement is in spec). One other approach is to buy a reground crank from Crankshaft Rebuilders in FL, they will include main and rod bearing sets.

    Finally, picking up a low mile 3.2 engine and freshening that up seems popular.
     
  4. 93rev2sev

    93rev2sev SHO Member

    Joined:
    Nov 1, 2004
    Messages:
    6,459
    Likes Received:
    1,823
    Occupation:
    Network Eng.
    Location:
    Hockeytown
    If were only talking about .030", any full blown machine shop should be able to handle that, i'd think.
     
  5. sho'noffmtx

    sho'noffmtx Many SHO's

    Joined:
    Nov 12, 2004
    Messages:
    692
    Likes Received:
    64
    Occupation:
    Electrician
    Location:
    Delano,MN
    There was a guy in minnesota trying to sell a set of main bearings if your looking for a set
     
  6. zak

    zak SHO Member

    Joined:
    May 15, 2002
    Messages:
    1,578
    Likes Received:
    378
    Location:
    east of Hartford
    Home Page:
    Perhaps I should have typed "know how to do line boring well". If the new centers are even marginally off the old ones, the oil pump won't line up, which can cause all kinds of problems. Older V6/V8, with shaft driven pumps, can tolerate the boring bar causing crank centerline to change a bit.
     
  7. probe_racer

    probe_racer Active Member

    Joined:
    Nov 7, 2009
    Messages:
    147
    Likes Received:
    58
    Location:
    california
    i remember a few years back at the ranger forums there was a guy selling sho crankshafts that fit vulcan engines. every machine shop i have gone too, they all have told me straight up that they cant work on it since the bearings and other parts are discontinued. One of these shops though said to just send bearing to swain coating to have them coat bearing with this special layer so they last as long as possible.
     
  8. yamahaSHO

    yamahaSHO E85 whore

    Joined:
    Jul 25, 2002
    Messages:
    10,597
    Likes Received:
    2,385
    Occupation:
    FEMA... You like camping?
    Location:
    Colorado
    How many machine shops have you personally dealt with that could not properly line bore for you???
     
  9. SHOspazz92

    SHOspazz92 Banned

    Joined:
    Jul 31, 2002
    Messages:
    6,938
    Likes Received:
    3,646
    Occupation:
    2T2X1 : Air Transportation Specialist.
    Location:
    Angier NC / Pope AFB
    Home Page:
    Bump....anymore thoughts on this?
     
  10. Off Road SHO

    Off Road SHO Moderator Staff Member

    Joined:
    Jan 16, 2002
    Messages:
    5,682
    Likes Received:
    1,276
    Occupation:
    technologist geek
    Location:
    Arizona
    Yeah, buy my SHO Star engine with 58 miles on it.

    Tom
     
    SHOspazz92 likes this.
  11. SHOtimer

    SHOtimer #2910

    Joined:
    Sep 8, 2002
    Messages:
    4,082
    Likes Received:
    396
    Occupation:
    student
    Location:
    Santa Clarita, Ca
    Home Page:
    Shoot, maybe it is time I dig out the box of std main bearings I never used.

    Doug
     
  12. jimtash

    jimtash SHO Member

    Joined:
    Dec 18, 2001
    Messages:
    1,276
    Likes Received:
    183
    Location:
    nc
    Home Page:
    I've got 4 different sets of used bearings and you're more than welcome to pick and choose.
     

Share This Page

If you wish to help keep SHOforum running, please click the donation button below