NSX Health Check Service

[Kaz-kzukNA1]

8. Door lock switch

Quite often, I was asked to investigate the electrical issues on NSX and one of the common failures is related to the non-waterproof connector being used inside the door. On this NSX, the driver side door lock sw was not working at all.
After long years, the moisture corroded the GND pin on the non-waterproof connector and lost part of the contact point. In order to prevent this from happening again, decided to use gold plated terminal with grease inside the connector. Now, it is fine…

[Kaz-kzukNA1]

9. Painting wiper arm

Black is very important for the presentation of your NSX. For example, it will make great appearance if you have nice black colour at the front lower spoiler, the upper seal of front windscreen, the tyre, the pillar and so on. Unfortunately, our wiper arm is very old design and sticks out behind the bonnet resulting in chip by the stone, etc. Also, if you wash the car regularly and if you are not careful, you can gradually scrape off the paint from the wiper arm.
So, it would be nice to spend some time painting them. Strip the old paint off and apply several coats of primer first. Then, wet/dry sand it down a little to get smooth surface and wash and dry it. De-grease it and then apply several coats of nice mat finish black paint. Now it looks much better.


10. A/C gas leakage

There are several common places to check for the A/C gas leakage on our NSX. The worst part to find the leakage is at the evaporator. While I was cleaning the evaporator, unfortunately, I found the leakage there. This is a big job to repair as we need to first remove the entire interior panel (yes, the whole one in front of the driver and passenger seat…), take out the evaporator and heater core as a package and then replace/repair the evaporator. As this NSX is using the old R12 system and although alternative R12 gas in available, we’ll be replacing the compressor, pressure valve, O-rings and so on to convert it into R134a system in the future.

The next stage is the complete Brake service, Driveshaft refurbishment and so on.
Just waiting for the parts to arrive…


Regards,
Kaz

[NSXGB]

8. Door lock switch
Quite often, I was asked to investigate the electrical issues on NSX and one of the common failures is related to the non-waterproof connector being used inside the door. On this NSX, the driver side door lock sw was not working at all.
After long years, the moisture corroded the GND pin on the non-waterproof connector and lost part of the contact point. In order to prevent this from happening again, decided to use gold plated terminal with grease inside the connector. Now, it is fine…

Kaz, are these connectors a Honda part or standard electrical part? I need a pair for the third brake light so that it can be wired properly....I'm presuming they will be the same ad will clip into the plug housing?
If it's a Honda part, do you have the part number please?

[markc]

Hi Kaz, interesting to see the wear/rust on Paul's caliper pistons. I was going to undertake a rebuild of my calipers over the winter and suspect that I'll find similar damage to the pistons on my car.

A couple of questions if I may...
What does the caliper overhaul kit you mention contain? Do you have a part number to hand?
What other parts should I order?
How many pistons did you replace?
How much, roughly, are they each?

Thanks

Mark

[goldnsx]

What are the part no. for this?

[Sudesh]

You can buy the calliper seal kit from Honda. The seal kits are NO:1 in both pics.

But after that you can basically buy all the other bits too, pistons, bolts, retainers and so on.

Front callipers break down


Rear Callipers

[markc]

Thanks Sudesh. Mine's a 3.2 so I'll need the specific p/n's for the kits etc.

I'll do the fronts first so, might need a 12 & 15 (piston) for each side. Maybe new bolts as the calipers have been on and off a few times. The slider pins are good 'cos I checked and lubed them up at the last pad change (for the Silverstone track evening) just a month or so a go.

I must get myself one of these parts CD's

Actually there's probably no point in getting the part numbers as the muppets at UK Honda dealer parts desks seem to be incapable of suppling anything without a chassis number.

Cheers

Mark

[Sudesh]

Thanks Sudesh. Mine's a 3.2 so I'll need the specific p/n's for the kits etc.

I'll do the fronts first so, might need a 12 & 15 (piston) for each side. Maybe new bolts as the calipers have been on and off a few times. The slider pins are good 'cos I checked and lubed them up at the last pad change (for the Silverstone track evening) just a month or so a go.

I must get myself one of these parts CD's

Actually there's probably no point in getting the part numbers as the muppets at UK Honda dealer parts desks seem to be incapable of suppling anything without a chassis number.

Cheers

Mark

Hi Mark,

No problem at all. The parts pic I used will vary with the numbers, I used it just to indicate the calliper build. I have JDM parts system, UK and US. Some dealers can be picky with the chassis number issue, but with the correct part numbers I have never had a problem going to the dealer. Also alot of the part numbers on the parts CD systems have been superseded, so its always worth checking with the dealer. There will also be a difference in NA1 and NA2 builds.

Personally Mark, if doing a full rebuild I would replace everything, pistons, bolts, seal, retainers, and so forth.

[Kaz-kzukNA1]

Hi Kaz, interesting to see the wear/rust on Paul's caliper pistons. I was going to undertake a rebuild of my calipers over the winter and suspect that I'll find similar damage to the pistons on my car.

A couple of questions if I may...
What does the caliper overhaul kit you mention contain? Do you have a part number to hand?
What other parts should I order?
How many pistons did you replace?
How much, roughly, are they each?

Thanks

Mark

Hi, Mark.

If you look at the 4th photo of the post #67, you'll see the part no and the parts included in the Front OH kit for later spec Front Calliper.
It's 01463-SL0-J01.
You need two of these for the Front.
For those who are interested, please note that the later models has different Front calliper piston size compared to the earlier ones and thus, requries differnt OH kit.

Some of the NA1 (3.0L) engine models were also equipped with this later spec callipers so please be carefiul if you are trying to distinguish the brake calliper spec by the engine size.

Also, if it is a used car, your previous owner may have upgraded the calliper to the later spec. It is quite common and for example, my NSX is 94 model but I'm running the 02 Type-R callipers.

You don't need to replace the pistons and other parts such as the bolt unless they are damaged. You can only judge it by opening the calliper.

For your referece, followings are some of the prices in UK.

HUK price for LATER spec Front calliper
Front OH kit: 80.89 inc.VAT x 2 = 161.78
Front Piston 34mm: 38.16 inc.VAT x 2 = 76.32
Front Piston 40mm: 63.94 inc.VAT x 2 = 127.88

Addition to these, I normally replace the following for the front calliper service. Parts no and image included in the same photo of post #67.
Bleeder screw: 4.67 inc.VAT x 2 = 9.34
Cap, bleeder screw: 2.70 inc. VAT x 2 = 5.40

So, if you go down the route of HUK, you'll be looking at at least 380.00 just for some of the Front Calliper Parts...

As I always service my calliper every 2 -3 years, I don't want to pay this figure so I always order them from Japan or US.

Hope this will help.


Regards,
Kaz

[Kaz-kzukNA1]

Recently, I was working on another NSX for Brake Calliper OH, Master Cyl OH, Driveshaft service and so on.

The owner bought the NSX as a used car and there were several previous owners in the past.
Initially, the owner brought the car for my Health check and there were many items to be serviced so we discussed the plan based on the available time and the budget.

1. Brake Calliper
The owner had the new brake pads installed at a certain garage and also he was under the impression that the callipers were serviced in the past by the previous owners.
However, at the time of my NSX Health Check Service, I drove this car and the brake performance was nowhere near to the original spec. It was also causing lots of judder when the brake temperature was high. The Brake Master Cyl looked terrible but I’ll touch on this later.

It was agreed to carry out the brake calliper and master cyl OH, replace the brake disks, replace the brake hoses and paint the callipers in matt black.

As soon as I started the service, I found the 1st issue.

One of the boot was damaged when someone carried out the calliper OH or when re-installing the callipers after the new pads were installed. It was not just one side but on both R & L Front Callipers so it was a human error. Also, found that the orientation of the slider pins was wrong, the torque for the rear calliper bracket was too low which was really dangerous and so many other issues.

I’m glad we carried out this OH service as the owner was planning to take this NSX on Nurburgring in near future.

All of the pistons looked very healthy as they were replaced recently but not sure whether it was serviced by someone who knows the specific knowhow for the NSX or not after finding so many issues.

It’s a standard calliper similar to other production cars but requires some knowhow.

The Front and Rear Calliper OH parts. The new Front Disk by Dixcel. Thanks to Andy at Vtecdirect. We placed the order long time ago while he was offering special deal on all products as well as the NSXCB member's deal.