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

There were some traces of the oil on the IG coil body at the front bank.
With the mirror, I can see the oil running down the IG coil hole at the cyl head so the oil seal is not doing good enough job.
Rear bank IG coils were fine.








As seen on so many NSX, IG coil at the rear bank especially the #1 & #2 cyl ones were very rusty.

The one at #1 cyl is already showing the effect of excessive rust lifting the metal core which could break the wire windings inside the coil body resulting in misfire.






Some traces of moisture and corrosion on #1 and #3 spark plugs but generally in good condition so going to just re-use these spark plugs.

By the way, #2 and #3 spark plugs were very loose and that's why you can see different colour at the thread.




Very good compression data with very limited deviation between each cyl but with such low mileage, it was expected any way.
Quite often, more damages were done by adjusting the valve clearance without much experience with the NSX engine.
No need to touch it until the next TB/WP service despite the UK service schedule includes it at every 3 years.




Applied silicone grease to the IG coil cover gasket to keep it in healthy condition.
Prevents too much water getting behind causing extra rust on the IG coil.
Especially important for the rear bank IG coils.