NSX Health Check Service

[TheSebringOne]

Me too, I will need a new LMA when I'm doing the TB, WP etc

Are the LMA different as NA1 and NA2?

I can't believe the price for either LMA is that reasonable!

[Sudesh]

From what I can gather the Lost Motion Sensor for NA2 had the part number:

14820-PR7-A02 which was £41.07 plus vat BUT that has been superseeded to
14820-PCB-305 which is the one Kaz has pictured

Me too, I will need a new LMA when I'm doing the TB, WP etc

Are the LMA different as NA1 and NA2?

I can't believe the price for either LMA is that reasonable!

[NSXGB]

FYI $24 each in the US.

[markc]

From what I can gather the Lost Motion Sensor for NA2 had the part number:

14820-PR7-A02 which was £41.07 plus vat BUT that has been superseeded to
14820-PCB-305 which is the one Kaz has pictured

I thought there was a later design perhaps coinciding with the +02 LEV engine? These cars always sound quieter to me.

I had all the valve clearances checked and re-set, although none of them were out apparently, and mine still sounds a little "tappety" as do most earlier cars.

With mine not being double glazed and also having the mesh engine cover it sounds a bit clattery in the cabin hence the desire to upgrade.

Cheers

Mark

[Senninha]

Would these be stock on the NA2 NSX-R?

When we heard that car on tick over at Chiswick it was for me the quietest engine Ive come across. If this is the result I'll be in the que with you Mark.

regards, Paul

[Kaz-kzukNA1]

Hi, all.

Originally, Honda designed different Lost Motion Assy (LMA) for MT and AT engines.
It had somewhat complicated design using spring inside the cylinder body. This design was used on both C30A and C32B engine up until the introduction of LEV engine in 99 (JDM).

When LEV engine was introduced, Honda decided to simplify the design of LMA (now just a spring) and also used the same LMA for both MT and AT engines. The parts no for LMA for LEV engine onwards is 14820-PCB-003.

In 2006, Honda decided to stop manufacturing the original LMA with complicated design (spring inside the cylinder) for the pre-LEV engines and superseded it to the latest LMA 14820-PCB-003 as above.

This raised lots of question marks as the body length of the latest LMA was shorter than the original ones.
We actually raised concern to Honda regarding this.

In fact, when my master used the latest LMA on the pre-LEV engine with high lift camshaft, it made more mechanical noise than before.
So, he designed a thin spacer to be seated at the base of latest LMA to make the body length to be the same as the original one. I think SoS designed similar products for different reason.

After long waiting, finally Honda released a new version of LMA for pre-LEV engines to match the body length of original LMA design.
The parts no of LMA for pre-LEV engines is 14820-PCB-305 and this is the one that I purchased for my engine.

As each country has different definition for ‘year model’, it is best to check the actual LMA parts number used on your engine based on the VIN (as long as you haven’t modified your engine).


Regards,
Kaz

[Kaz-kzukNA1]

In memory...

[gumball]

Nice pics Kaz, Ayrton would have been fifty today. R.I.P.

[markc]

Thanks you for the excellent and very complete advice Kaz.

Sounds like only late UK pop-up cars (1999-2001) might be in any doublt.

I can be fairly certain that my 1997 built JDM 3.2 needs the retrofit parts, p/n 14820-PCB-305, that you are fitting to you car.

How much does a set of these cost?

Cheers

Mark

[Sudesh]

Mark they are £9.98 each plus VAT,
Total £11.73 each.

I can be fairly certain that my 1997 built JDM 3.2 needs the retrofit parts, p/n 14820-PCB-305, that you are fitting to you car.

How much does a set of these cost?

Cheers

Mark