Wrong rings can I should I lap em?

Discussion in 'Rotating Assemblies' started by NitroInjected, Nov 8, 2018.

  1. NitroInjected

    NitroInjected Well-Known Member

    I think my calipers are going to caliper hell. I Was on the phone with the company when I measured the dimensions three times on the old ring but the new ring does not fit in the groove. They are for the same piston but a different application. These rings look to be coated. So I was wondering IF some granite wet paper and light oil oculd come to my rescue or do I need to post for another ring. I may have to buy a set as the man that sold them to me broke up a set for me... Nice of him to do and I do not want to ask him to do that again. I know about lapping them to the bore but I do not know if people lap them thickness wise.
  2. chromebumpers

    chromebumpers solid fixture here in the forum Staff Member

    I wouldn’t - no way!
  3. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

  4. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    No. Wrong rings.
  5. NitroInjected

    NitroInjected Well-Known Member

    Thanks boys I ordered new rings before I looked at this. Just to be safe. But, I am quite sure these are just a thickness difference. Got my crank sitting in the block on the new bearing BTW! Not what I envisioned but the block is cleaned the crank is treated and balanced with polished journals so I mean... Its still a win. New ring is coming faster should be here next thursday. Used 30wt diesel oil for assembly lube... funny thing is I must be using the same thing that was sold through lotus as its the same color and consistency. Red dye in it.
  6. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    The cylinder walls you want 10w30 or 5w30 on them.
    I pour onto a clean shop towel.
    Squeeze out the excess. Wipe down the cylinder walls & piston skirts and rings.
    Some guys like dunking in a coffee can full of oil. Too messy for my liking.

    I have used Castrol Synthetic of EDGE( 5w30) oil as assembly lube on the cylinder walls, nothing else at the Race shop last year, Ran out of Royal Purple & Brad Penn assembly lube.
    One puff of smoke on startup out the exhaust & took off running the LS 6.0, Ford 331 - 302 stroker, & Mitsubishi EVO race engines.
    Piston Rings sealed immediate.
    Never told the boss what I used.
    Kept as my secret.
    NitroInjected likes this.
  7. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    10w30 dino Mineral grade on my Past Poncho engines.
    Mains & Rods I used Clevite Bearing guard.
  8. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    The 1992-1996 C4 Gen Corvettes were all 1st started on Full Synthetic Mobil 1 oil.
    Carried exact same into the LS Corvette era.

    Do what makes you comfortable.
  9. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    The piston wrist pins do not forget to prelube.
    The engine will lock up blow chuck a connecting rod out the side in 5 seconds if you do not.

    Brad Penn is good.

    I use Castrol GTX Oil most of the time.

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