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

The existing coolant hoses looked to be from original and really tired.

Lots of rust on the hose cramp and the pipes.


Looks like the pipes hidden by the hose are already corroded and I’ll be spending hours cleaning them again….

Glad it’s not winter yet….

The owner told me that the spark plugs were replaced in the past.

As I have no idea how they were installed, removed them while the engine was cold.


All three spark plugs at the rear bank were at lower torque and not tight enough.


The corrosion level at the insulator body of all six spark plugs is very low so these are going to be re-used.


As seen on almost all of the NSX, the corrosion on the IG coils at the Rear bank was severe.


The ones at #2 and #3 cyl were the worst hit.


At this stage, there is no misfire so these will be re-used but if any misfire detected in the future, first place to look at is these IG coil.

The condition at the Front bank was fine.



Will place these IG coil and spark plugs back in the engine, warm it up, compression check and then start with the cooling system refurbishment.

Kaz