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Thread: Need L28 specs.

  1. #1
    Registered User my_mad_z's Avatar
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    Default Need L28 specs.

    Hi guys, was wondering if anyone has the specs for the L28; I have the Haynes manual for the L24/L26 but the supplement chapter doesn't contain much info on the L28. I was after the wear limit for the compression rings. I'm not sure if it's the same as the L24/L26.... The rings have done a hard 20,000km's......I can't remember the gap that I measured, I took the measurement a while back and forgot to chase it up. If anyone could help or lead me on the right track, that would be great!

  2. #2
    Registered User Ben's Avatar
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    Default

    The specs are the same across the board. Frank Honsowetz (How to Modify Your Nissan & Datsun OHC Engine - Nissan # 9996-M8012) states that as a rule of thumb use 0.005" per inch of bore on #1 compression ring & 0.004" per inch on #2 compression. Oil is not critical - 0.010"-0.040" is ok. This gives most engines (avg 3.4" bore) 0.017" on #1 & 0.014" on #2. Bearing in mind that 0.001" bore taper will change the ring gap by 0.003" through its travel.

    Incidentally, this is an easy way to roughly measure the bore taper - measure the gap @ TDC & BDC & div by 3.

    You should also get a copy of the Tom Monroe 'How to Rebuild Your Nissan/Datsun OHC Engine' (HP Books) (Nissan #99996-M8013)
    Ben
    Adelaide,
    South Australia.
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  3. #3
    Registered User my_mad_z's Avatar
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    Thanks a lot for the reply Ben, looks like I may have to bore the block and replace the rings.....Will also look into investing some $$$ on the books you refer to. Thanks once again.

    Marc.

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