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Thread: LMA: 14820-PCB-003 or 14820-PCB-305

  1. #1
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    Default LMA: 14820-PCB-003 or 14820-PCB-305

    Do the spring LMAs have two versions in the NSX? In one shop I saw that 91-99 and 00+ are different.

    Just a little bit confused. The US parts catalog says:
    14820-PCB-003 does fit your 2000 but not 14820-PCB-305
    and
    14820-PCB-305 does NOT fit your 2000 but 14820-PCB-003 DOES.

  2. #2
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    Default

    The cars with LEV-spec engines came with simplified LMA's. I think that you can use the later ones on earlier cars but check - I'm sure that Kaz has written up a piece on these somewhere.
    If you search by Tag on Kaz's Blog, using LMA, you will find lots of posts, including him using the new-style LMA's on an NA1 engine.
    Last edited by NZNick; 20-06-2019 at 09:17 PM.
    December '99 GH-NA2 110 series - 6AS62 Type S in Monte Carlo Blue Pearl

  3. Default

    you need 14820-PCB-305 for the 1991+ C30 engine. I stock them
    Largest stocking of used NSX parts in Europe & many service parts in stock. parts inquiry: office@atr-racing.com / phone +43 676 5458032

  4. #4
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    For the latest spring LMA desgin, there are two different spec.
    It's the overall length difference and easily can tell by the presence of bottom spacer (-305) or without (-003).

    The LMA pocket geometry on the cyl head is different between pre-00 and 00+ models.

    00+ model (both the MT and AT) left the factory with the latest LMA without the bottom spacer (-003) because the cyl head was machined that way.

    For pre-00 models, there used to be lots and lots of different spec/design LMAs, like 7 of them and even there was a difference between MT and AT.

    Initially, Honda made mistake in superseding all LMA parts no. (including the pre-00 models) into just one 00+ spec of -003 that has no spacer at the bottom.
    This made the LMA length/height shorter causing extra mechanical noise if used on the pre-00 models.

    It stayed like that for several years but finally, Honda acknowledged it and released new LMA for pre-00 models with the spacer at the bottom (-305).

    Don't know whether the spring rate is the same or not between -305 and -003.
    Extra info here; http://www.nsxcb.co.uk/showthread.ph...8602#post68602

    For the clarification, 00+ AT model is C30A but left the factory with -003 so can't use -305.

    Kaz

  5. #5
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    Thanks very much for the deep insight into the different LMA versions. I've also read the thread back in 2010 and was still a little bit confused. I thought the machined pocket was identical throughout the years (why should they change it, now we know why).

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