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

Eng Refresh + LMA, etc 15

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The CRK/CYL sensor.
The potting has melted away and exposing part of the sensor.

Although no issues at this stage, I know a few failed when the sensor was completely exposed so will replace it as I have no idea what will happen until the next TB service.
With such amount of melted potting, it’s going to take extra time cleaning all of them…....







In fact, because the valve cover gasket and the cover itself were not installed properly, there were so much oil seepage behind the TB back plates.
It’s going to take even more extra time cleaning them.










Checking the state of existing all 12 LMA.

It’s the 1st gen design and once again, it confirmed that the eng was parked for a long time during its life.
A few of them were not sticky and just bit tired but rest of them were either really sticky or a little sticky.
With regularly used engine, you will see most of the LMA showing similar wear/fatigue.
All of them will be replaced to the latest design.










VVIS butterfly screws inspected using the fibre scope.
No gap at the base of screw head so for now, no worries of screw jumping into the cyl though the intake valve.

There were noticeable amount of oil trapped at the VVIS chamber plate.
Clean it next time in years time.










However, the TH body needs attention. So much build-up of sticky gunk.

As idle air adjust screw looked to be touched in the past, I’ll remove and replace it as I don’t want seeing hunting idle rpm after the service.


It’s in one of the worst state as the thick gunk is already building up at the edge of the butterfly.
This is going to take some time for cleaning it properly….










VTEC spool valve, solenoid and oil press sender unit removed, ready to pull out the rocker shafts.













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