View RSS Feed

Today at Atelier Kaz - ex-Honda R&D, F1, Indy/CART engineer

Cooling Sys, Health Check, etc 03

Rate this Entry
2 Comments
by
Kaz-kzukNA1
, 28-05-2016 at 11:53 PM (3193 Views)








The side Eng mount.
This NSX is AT model so no thin rubber cover on top.

I’m afraid it’s already split and must be replaced.

Looking at the state of the TB mid covers (missing bolts), valve covers (not installed peoperly), etc, I have a feeling that all four mounts were not tightened in the specific sequence so I’ll loosen all of the mount bolts/nuts and re-install them properly.




ABS reservoir already exceeding the Max line and about to overflow from the cap.
Typical leaky solenoid phenomenon with possibility of nitrogen gas loss from the accumulator.
I’ll check the amount of fluid that can be held inside the accumulator later.




The check window at the a/c receiver was showing brown debris while running the compressor.

And looked to be still R12 system.

Any a/c issue would result in huge cost especially if any metal debris from the compressor released into the system or too much moisture entering the system from any cracked pipes or leaky fittings.
Best to act at the first sign of issue or as soon as your compressor starts making some noise.




As seen on many NSX, the defrost panel has cracked…..
I need to replace mine also when I’m taking out the entire dashboard for replacing the a/c evaporator.
Already the parts are sitting in my house…. Just no time and summer is already approaching (or is it????)





Some sort of tape or cover material on top of the OEM upper molding/fastener.






I don’t want to know what these unterminated wires are….
And the panel under the glove box are already cracked in several places and being taped by someone….
3D printing anyone??





Same for the panel under the gauge assy.









Categories
Health Check Service

Comments

  1. Pride's Avatar
    "ABS reservoir already exceeding the Max line and about to overflow from the cap.
    Typical leaky solenoid phenomenon with possibility of nitrogen gas loss from the accumulator.
    I’ll check the amount of fluid that can be held inside the accumulator later."

    Hi Kaz, I had this problem of fluid coming out of my cap about 6 or 7 years ago and couldn't understand why.
    It stopped on it's own a few weeks later and hasn't done it since.
    Can you please tell me if it's likely to happen again, what caused it and is it wise to leave until it does happen again???
    What do I would need to do to cure it???

    1992 NA1 with origanol ABS

    Thanks
    Updated 29-05-2016 at 07:54 AM by Pride
  2. Kaz-kzukNA1's Avatar
    For the classic ABS, I’m afraid there are so many scenarios that can trigger this issue and this is the reason why you must flush the system regularly.

    Exercising the ABS regularly whenever you drive your NSX will help in preventing one issue (leaky solenoid) but also it will introduce another issue if not done properly.
    Therefore, best if you flush the system by applying 12V to the inlet and outlet solenoids.

    Unfortunately, most of the advice out there is to follow the famous danoland method which is great but it can only flush half of the system and next time when you activate the ABS while driving, it will introduce air into the accumulator depending on when the ABS pump was activated.

    Almost impossible to tell the exact cause of your issue from what you wrote so far but followings are the possibilities.
    I won’t go into detail on how to check and fix them as you will need to understand the ABS system diagram, solenoid structure, fluid flow design and thus, it will be a long-long story.

    Leaky solenoid
    Partial loss of nitrogen gas from the accumulator
    Lots of air trapped inside the accumulator
    Some air trapped at the piston chamber side of the ABS
    Larger o-ring at the solenoid body is contaminated and leaking the high pressure fluid to the outside world.


    You will need to first release the high pressure fluid from the accumulator completely and then activate the ABS pump.
    Time the length of the ABS pump operation and monitor the pressure sw.
    Once the sw is closed, stop the clock and stop the pump after 3sec.

    Now measure the amount of high pressure fluid stored inside the accumulator by collecting the fluid using the ABS T-wrench.
    The time it took to close the pressure switch and the amount of fluid collected will tell the health of the ABS pump and the accumulator.

    You will need to carry out several other methods to check the health of each solenoids.

    You need to check whether the wet area was caused by the fluid overflowing from the cap or the fluid actually leaked through the o-ring at the solenoid body.


    Kaz