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

All these time spent are for this moment – the compression check after the Eng Refresh.

Before start of the service, I noticed that all of the inlet valves had only about 0.09mm clearance when the spec is min 0.15mm.
I know some of the engine specialists use different clearance on purposely but don’t think it’s the best matching method for the AT torque curve.
Also, previous adjustment was not evenly done so there was about 11psi difference although all six cyl were well within the spec.

After carefully adjusting the valve clearance, the engine sounded so smooth and quiet.
This was backed up with steady IG timing and only 3psi compression difference now.

Very happy with the result.

























Can’t detail the engine as it’s still hot but already showing big difference.
Before/After.




Eng bay cover back in place and will adjust the alignment later to minimise the fogging up of the rear hatch glass although
with the already tired rubber seal, not going to be easy.











By the way, before installing the eng bay vent, applied simple quick solution for reducing the water splashing over the rear IG coil cover.
Nowhere near to the solution by Jonathan but at least, it will reduce the amount of water.


A while ago, when it was raining almost all day, I had an opportunity to monitor how the water runs down the rear hatch glass and enters the eng bay on my NSX.
I removed my eng cover long time ago so it was easy watching the water flow. Will touch on this in separated post.