Excessive Blow-by on Fresh Engine

Discussion in 'Engine Topic' started by 71smalbloc, Jun 24, 2019.

  1. 71smalbloc

    71smalbloc Member

    Messages:
    80
    Likes Received:
    2
    Joined:
    Jan 6, 2016
    Location:
    Blacksburg, VA
    No detonation problems. Only other thing I can think of is the top end is a little noisy.
     
  2. 71smalbloc

    71smalbloc Member

    Messages:
    80
    Likes Received:
    2
    Joined:
    Jan 6, 2016
    Location:
    Blacksburg, VA

    I'll do that, thanks for the input!
     
  3. 71smalbloc

    71smalbloc Member

    Messages:
    80
    Likes Received:
    2
    Joined:
    Jan 6, 2016
    Location:
    Blacksburg, VA
    Block was hot tanked and honed.
     
  4. G72Zed

    G72Zed Veteran Member

    Messages:
    1,586
    Likes Received:
    507
    Joined:
    Sep 8, 2015
    Location:
    Canada
    A few questions for you 71smallblock.

    1- Are they the Gapless tops or 2nd ring.

    2- If the Gapless is on top, did your builder use or mentioned using the Total Seal "quickseat" in conjunction with Total Seals bore/hone prep recommendations??, was a TQ plate used to final hone, type of break in oil and how long was it used for?

    As far as a comparative, everything being equal, you will have better "cranking" pressure when tested vs a traditional top ring.

    If this checks out even in all cylinders (within reason), as mentioned, a leakdown is next, if the bore prep was done correctly, you will have great leakdown #'s as well, and there lies the conundrum.
     
    Last edited: Jun 24, 2019
    71smalbloc likes this.
  5. 71smalbloc

    71smalbloc Member

    Messages:
    80
    Likes Received:
    2
    Joined:
    Jan 6, 2016
    Location:
    Blacksburg, VA

    I'll definitely ask him these questions. I've had a "rebuilt" engine in the past (different builder) which was diagnosed with ring seating issues but that one consumed a lot of oil and smoked a good amount. This one hasn't consumed a drop of oil in 600 miles.
     
  6. G72Zed

    G72Zed Veteran Member

    Messages:
    1,586
    Likes Received:
    507
    Joined:
    Sep 8, 2015
    Location:
    Canada
    Yep, some swear by them, and some swear at them.

    That's a good sign, but it's early, and depends how you drive it, you may be OK.
     
  7. 70lt1z28

    70lt1z28 Veteran Member Gold Member

    Messages:
    3,692
    Likes Received:
    752
    Joined:
    Oct 3, 1999
    Location:
    Beavercreek, Ohio, USA
    Head gasket might be blown into a the lifter valley. Possible but rare.
     
  8. Michael Sammy

    Michael Sammy Member

    Messages:
    78
    Likes Received:
    11
    Joined:
    Dec 23, 2017
    I had what I thought was blowby. Turned out the carb was sucking oil through the hose that ran into the breather of the valve cover.
     
  9. cadillac_al

    cadillac_al Veteran Member

    Messages:
    893
    Likes Received:
    97
    Joined:
    Apr 22, 2015
    Location:
    Maine
    The engine builder is probably right. Is that 600 easy cruising miles? It is barely broken in. It's time to hammer on it a little and do some deceleration runs to seat those rings.
     
  10. 77 cruiser

    77 cruiser Veteran Member

    Messages:
    562
    Likes Received:
    29
    Joined:
    Nov 17, 2006
    Location:
    Frostbite Falls MN
    Torque plate honed?
     
    CNC BLOCKS likes this.

Share This Page