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Today at Atelier Kaz - Private NSX Enthusiast, ex-Honda R&D engineer with F1, Indy/CART background

Eng Refresh + LMA, Brake OH, etc 46

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As mentioned in my last post, considering the weather forecast, decided to go out for the test driving session
even before completing the ABS and EPS controller services.

ECU was already reset after adjusting the base idle air and after the compression check.

Not sure how the temperature changes over the next few weeks,
so decided to set the tyre pressure at the OEM 40/33 psi spec.
The owner will be replacing the rear tyres any way.


Went out for the 1st initial test driving session for general checkup and then back on the lift.

As reported in the Health Check report, small slip at 3rd gear upshift but no problem getting into all gears including the 4th.
ATF level is still bit too much when checked at 70sec after stopping the engine but I already drained total of 1L and
when going through all gears (like test driving session), the ATF volume tends to expand further so will check it again later.

Still, with this mileage, happy with the smooth power delivery of the engine/gbox.
With F-matic feature, I quite like AT model as well especially when I used to drive through the steep mountain road or
heavy traffic jam in Japan.
M25 morning traffic is nothing for me…. Stop and go but it still moves.


After carrying out the general inspection on the lift, time for the 2nd test driving session.
This time, it’s the 30min 60 – 70mph cruising mode for the O2 sensor feedback loop and on the way back,
there is a long-long up slope junction that I can safely engage VTEC well before merging the main lane to check spool valve
and general behaviour of the engine at high rpm range.


Happy with the result including the brake performance and pedal feeling so another cool down session
before heading back and onto the lift.







Everything looked fine so finally, happy to apply this JDM spec TB service sticker included in the TB kit.
If the owner doesn't like it, it can be removed with ease.

I prefer the TB with the JDM parts # because it’s well protected inside the clear bag and comes with this sticker.
If you order it outside of Japan using the standard parts #, the TB is exposed to outside world and
you never know what may become in contact with it before arriving at your place.


Will re-torque the wheel nut once cooled down.








One thing to be mentioned.

Although I was very careful not to top up to the neck of the washer bottle, I still managed to cause the washer fluid to climb up the fluid level tube and
seep out through the tiny hole in the cap.

Unfortunately, I use blue coloured washer fluid and it looks almost the same as the Honda Type 2 coolant.
If you find tiny blue marking on the floor under the radiator, it’s not coolant leakage but it’s the washer fluid.




Will finish the ABS and EPS controller today and carry out final short test driving session probably tomorrow when the road is not wet.



Kaz









Comments

  1. nikey22's Avatar
    Kaz, why don't you use the OEM radiator when one needs replacing? Mine has lasted 21+ years. Just curious...
  2. Kaz-kzukNA1's Avatar
    Because Koyo Racing Rad is cheaper than OEM one and yet better construction.

    OEM one is recycled aluminum with two plastic tanks crimped at the top and bottom.
    Two different materials with continuous thermal shock.
    Eventually, the crimp will get weaker and start opening up resulting in leakage.

    Sometimes, the hose connection neck at the bottom side of the rad will crack as that's the entrance of the hot coolant on our NSX.
    On other production cars, it will normally enter from the top.

    Koyo Racing rad is widely used in Japan including the race teams.
    All aluminum so unless the welding gets weak, it won't crack.

    Your radiator may survived 21+ years but that doesn't mean the cooling efficiency is the same as the new one.
    Probably by now, reduced down to 50 - 75%.
    Not sure where you live but probably fine for street driving condition.

    Over the last 23years, I can't even remember how many times I replaced the radiator on mine for preventative measure as well as for R&D purpose.

    Kaz