Single Scored Liner - MBN Cat

Discussion in 'Trucks [ Eighteen Wheelers ]' started by underpsi, Jun 28, 2013.

  1. stranger

    stranger Road Train Member

    3,623
    4,843
    Oct 10, 2006
    NC
    0
    All I know is those wrist pin bushings have taken a beating.
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Bovinemoovers

    Bovinemoovers Bobtail Member

    26
    3
    Oct 30, 2012
    0
     
  4. BullDoggin

    BullDoggin Light Load Member

    183
    55
    Jan 27, 2013
    0
    could you explain?
     
  5. stranger

    stranger Road Train Member

    3,623
    4,843
    Oct 10, 2006
    NC
    0
    Milton-.jpg

    Scored and discolored.
     
  6. AUSSIE DAVE

    AUSSIE DAVE Road Train Member

    1,032
    172
    Feb 21, 2010
    OZ - Brisbane
    0
    That just sux, my 2 cents I only use ome piston cooling nozzles because I've had bad luck with non genuine ones. But your issue looks like over fuelling / over heating in that bore. Hope you get it fixed.
     
  7. 15 over

    15 over Light Load Member

    84
    45
    Jul 1, 2013
    Mobile, Al
    0
    You for sure have an over heating problem on that cylinder. I would have that injector checked to see if it was in fact over fueling. If it is I would raise cain with the supplier to warranty not only the injector but also the parts that it made fail.

    To me the 2 piston cooling nozzles are not the same. To check, I would find something flat, not diamond plate, C-clamp them both down side by side and use a carpenters square or something similar to compare the angles. The top picture in your set shows some blueing close to the oil drain back hole under the oil scraper ring. The second pic shows some sign of blueing but not as bad. The second sprayer on the cooling nozzle is designed to spray oil in the egg shaped hole on the bottom of the piston in pic #2. It doesn't look like it was getting oil in that hole from the discoloration.

    Also who put the engine together? Did they check the ring end gap clearance or the side gap clearance before installing the pistons in the liners? You might have had to tight rings, that will also cause cylinder scoring with low miles like you had.
     
  8. underpsi

    underpsi Road Train Member

    1,266
    289
    Sep 18, 2008
    Toronto, Ont
    0
     
  9. underpsi

    underpsi Road Train Member

    1,266
    289
    Sep 18, 2008
    Toronto, Ont
    0
    We had a mechanic come to our shop and put it back together. I had gave assistance with some of the build. I'm putting this back together myself so what can I use to measure clearances?
     
  10. AUSSIE DAVE

    AUSSIE DAVE Road Train Member

    1,032
    172
    Feb 21, 2010
    OZ - Brisbane
    0
    Feeler gauge for ring end gap and ring to groove clearance.
     
  11. underpsi

    underpsi Road Train Member

    1,266
    289
    Sep 18, 2008
    Toronto, Ont
    0
    Outside of the liner looks good

    [​IMG]

    Inside, not so much. Hard to see in the pic but theres little heat cracks in it like you'd see in a drum.

    [​IMG]

    There is traces of oil in the oval shape of the piston

    [​IMG]

    I also inspected the injector in good light today but theres no evidence of anything wrong with it from the outside. Obviously it could have an internal problem so I'll have to get them tested.
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  • Draft saved Draft deleted