Buick v6? Rocker shaft damage

Discussion in 'The "Other" Bench' started by Nailhead Ronnie, Nov 17, 2017.

  1. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    Well today I was offered a free engine and I went to go pick it up. It appears to be a Buick V6, I see some red paint on it and it's distributers up front. The guy who sold it to me told me it was in a Cutlass from 88, that he took out because the engine was making a ticking sound. The man also said that the owner of this motor before him had just rebuilt it.
    Looking at the engine, inside the valve cover 20171117_141438.jpg the damages on The Rocker shaft. It's cracked right in half, when I asked him about this he said that maybe the timing was off or something it. Anyways I got it for free what do you guys think cause the rocker shaft to break.
     
  2. BuickV8$Mike

    BuickV8$Mike Well-Known Member

    Fatigue and a stress riser. If you look and the broken end do you see two different type surfaces? PS, You should have bought my block.;)
     
    Nailhead Ronnie likes this.
  3. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    Lol.You're right I should have bought your block. Soon after I bought a Cadillac 472 for 350 bucks that ended up being a boat anchor. I did end up getting in the 430 for a hundred bucks. I'm away from the engine right now but I'll check to see if there are two different surfaces on the break. Thanks man
     
  4. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

  5. Turbo86GN

    Turbo86GN Silver Level contributor

    My first GN had about 3 cracked valve retainers so I replaced them all with Crane hardened. I had no idea why on a very low mileage engine.

    Maybe just fatigue and burnouts for this engine? Extra strength rocker shafts are available so maybe this is a weak point.
     
    Last edited: Dec 5, 2017

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