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

Health Check, Alignment, Brake OH, etc 01

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Started to work on another NSX from mid last week.
The service menu is to carry out the Health Check, Alignment, etc so thought it’s going to be a quick turnaround as I wanted to start working on the window alignment for another owner very soon before the new parts installed recently took set.

Then, after test driving the car and inspecting the brake system, recommend the owner to have the callipers overhauled.
In fact, there were several things such as the brake, cooling sys, etc included in the original service menu but they were requested to be removed initially.
Considering the age of the coolant hoses, I really wanted to replace all of the coolant hoses but Honda Japan will be on long summer holiday very soon and some of the hoses specific to this year model could be out of stock so has to wait until next time.




The fuel level is too low for taking the NSX for the alignment service.
I prefer doing it at least around the half tank level.
There are lots of items inside the boot so I need to take them out as well.



Some feedback from the test driving session;


Initially being told that one of the security fob doesn’t work. At the time of testing, both worked fine but one of them showed sign of weak battery so best to have it replaced.


Tyre pressure set at R: 2.7Kg, F: 2.2Kg for testing. Later, I found big nail in RR tyre so going to keep eye on the pressure change. So far, no slow leakage.




The owner had concern about the frequent on/off of a/c condenser fans as well as the air temperature coming out of the vent not high enough compared to other cars he owns.
Although the owner already bled the air from the heater core pipe (no air observed) by himself, carried out the same procedure and confirmed that there was no air in the system.
The condenser fans were operating as they should.
The water valve control was also working fine.
At this stage, there is no issue on the system.
Please note that when the a/c is on, the air temperature will drop while the humidity is removed. Therefore, even you set the CCU at the same temperature, having the a/c on and off will change the air temperature.
Unfortunately, the feedback control based on cabin air temperature change is not great at the CCU and the blower air temperature relies on the mixture of the air heated by the coolant (with the CCU water valve control) and the one from outside (fresh mode) or the cabin air (re-circ mode) so the feedback loop has quite small window for the temperature control.


Lots and lots of vibration at the head light unit and there was squeaking noise possibly from left side retractable linkage when it was operated.
We are going to replace the light unit adjuster and hope that is all it needs to fix the issue.


There was shimming noise coming from somewhere behind/below the dashboard although it could be from somewhere else. Not easy to pin point the source of the noise while driving on alone.


At 60mph cruising and other conditions;
PO: about 5.0kg, VB: 14.5V, TW: between the horizontal and one indicator below, steering wheel straight but couldn’t feel any bites into the road that should be there with this tyre (AD08R).
Brake just doesn’t stop.
OBD2 data looked fine.

At idle rpm;
PO: 2.2kg, VB: 14.2V


ABS #61 triggered in the past. Typical for low battery voltage.
The owner told me that the battery was replaced only 2 years ago with battery conditioner connected so very likely to be from the previous owner.
This NSX came with the latest ABS and any error code can’t be erased by removing the fuse or battery terminal. It has to follow specific procedure involving the brake pedal, IG key and SCS terminal.



Some of the findings from the Health Check.




Didn’t like the angle of the CL reservoir so re-installed it.




As seen on many NSX, moisture observed inside the left and centre tail light assy. Right one was still fine.




Looks like someone removed the LEV secondary air pump tubes but didn’t place them back quite.
Will push them in further later.





Very dangerous battery positive terminal. About to touch the bracket. In fact, the orientation of the bracket is wrong.
Also, the GND terminal is sharply bent.
Later re-installed the bracket in correct orientation and re-routed the GND cable differently.
Looks much better and safer.



Updated 02-08-2015 at 11:25 AM by Kaz-kzukNA1 (extra photo)

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