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4.3 fresh rebuild

Discussion in 'Chevy Trucks' started by ljrce, Jul 17, 2006.

  1. ljrce

    ljrce Senior Member
    Messages: 181

    4.3 bored 40 over gm torque cam
    new valves valve seats 75 miles on it sience rebuild now its blowing some blue msoke out the tailpipe on start up and going down the road oil presure and compression is all up there
  2. ljrce

    ljrce Senior Member
    Messages: 181

    any oen haev a clue
  3. wirenut

    wirenut Senior Member
    from nh
    Messages: 529

    rings not propery seated i would guess if its on acceleration
    valve seals on start up
    how was it broken in ??
  4. ljrce

    ljrce Senior Member
    Messages: 181

    ok im amsuming the rings where done right there where doen by a race engine shop thats been building engines for 25 years and the seats are brand new including valves and valves springs the break in was 1500 rpms for 20 mins to break cam in and would it make a differnce because i put a aftermarket airfilter on it thank u very much