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N14 scored cylinder

Discussion in 'Trucks [ Eighteen Wheelers ]' started by rollinsmoke10, Oct 26, 2016.

  1. Oct 26, 2016 #1
    rollinsmoke10

    rollinsmoke10 Bobtail Member

    26
    1
    Oct 11, 2009
    0
    I have a 93 pete with a N14 mechical engine that I just rebuilt 10k ago and it scored #6 cylinder agian. I bought the truck with the same issue (#6 scored cylinder). Water pump was replaced, piston jets replaced, oil pump replaced, injectors were rebuilt by a good diesel shop, plus the normal overhaul parts. I'm not the one always driving the truck so I cant tell you for sure if it ever overheated. Any suggestions on what to look for?
     
    rollinsmoke10, Oct 26, 2016
    rollinsmoke10, Oct 26, 2016
    #1
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  3. Oct 26, 2016 #2
    Heavyd

    Heavyd Road Train Member

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    Oil passage blocked for the oil cooling jet.
     
    Heavyd, Oct 26, 2016
    Heavyd, Oct 26, 2016
    #2
  4. Oct 26, 2016 #3
    rollinsmoke10

    rollinsmoke10 Bobtail Member

    26
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    Oct 11, 2009
    0
    I pulled the piston cooling nozzle and checked for blockage but it was OK
     
    rollinsmoke10, Oct 26, 2016
    rollinsmoke10, Oct 26, 2016
    #3
  5. Oct 26, 2016 #4
    BoxCarKidd

    BoxCarKidd Road Train Member

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    I heard of an ECM causing a problem like that. Saw a Massey Ferguson repeat that problem, bent rod, but your kit probably included rods. Was the new liner ID checked with a dial bore gauge?
     
    BoxCarKidd, Oct 26, 2016
    BoxCarKidd, Oct 26, 2016
    #4
  7. Oct 27, 2016 #5
    Heavyd

    Heavyd Road Train Member

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    No, I mean the actual passage in the block, make sure it is clear.
     
    Heavyd, Oct 27, 2016
    Heavyd, Oct 27, 2016
    #5
    BoxCarKidd Thanks this.
  8. Nov 1, 2016 #6
    cumminskid123

    cumminskid123 Light Load Member

    107
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    Jun 21, 2016
    Manitoba, Canada
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    Maybe a bad connecting rod? Unless they're all new
     
    cumminskid123, Nov 1, 2016
    cumminskid123, Nov 1, 2016
    #6
  9. Nov 1, 2016 #7
    AModelCat

    AModelCat Road Train Member

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    Canuckistan
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    Never touched an N14 but what about poor coolant flow at the back of the block?
     
    AModelCat, Nov 1, 2016
    AModelCat, Nov 1, 2016
    #7
  10. Nov 4, 2016 #8
    wrenchman

    wrenchman Bobtail Member

    16
    7
    Nov 4, 2016
    0
    Hey Rollin, if you have made certain the piston cooling nozzle and passage is flowing oil, and the cooling system is open and flowing correctly in the block and head, perhaps did a liner o-ring get rolled, been there done that. You stated it is a mechanical N14, That means it is a STC engine, that being stated, it could be an issue with the STC/HVT system. I have found shop rags, paper towel and so forth blocking cooling and oil passages. Perhaps, though, it is only #6, not #5 also, anyone check the cam follower timing? Just thinking out loud. Take care, good luck.
     
    wrenchman, Nov 4, 2016
    wrenchman, Nov 4, 2016
    #8
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