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

The existing valve clearance was checked and all of them apart from just one adjuster were too wide but evenly matched so that’s part of the reason why the compression data didn’t vary a lot.
After this, backed off all of the adjuster before removing the TB.




I don’t think it’s leaking but after seeing this marking and also as requested from the owner, will be replacing the crank seal.




Not too bad for the melted potting from the CRK/CYL sensor. I will reuse this sensor this time.
Still, needs to clean the sticky potting……




All of the existing LMA were checked. They were all very soft/tired but no huge difference from one cyl to the other.
When I listened to the engine sound before the test driving session, I was expecting much more imbalance in the fatigue of LMA between each cyl so quite surprised.
Will see how it goes with the later spec LMA design. One thing for sure, the new one is much harder to press.

As expected from the clean valve cover, the cyl head is fairly clean.

The wear markings on the cam shaft/robe showed mixture of regularly used engine as well as the sign of low annual mileage ones. Extra markings for this mileage but nothing serious. Will inspect it further once cleaning the cam.




Once again, the accumulation of sand like tiny-tiny debris inside the intake manifold. It’s like the paste of micro compound so not good.

You will see this if the engine was used with the aftermarket air cleaner element/filter in the past.
With the OEM one, you won’t see this at this mileage.

Considering the valve seat and piston, I would stay with the OEM filter and air box although for 3.2L engine, there is a room for extra power but only at WOT region with the use of modified TH body.




The VVIS butterfly screws looked to be tight with no gap at the base but can't see some of them so as a standard procedure, will be using the fibre scope to inspect further.




The TH body was covered in fairly thick gunk from the blowby.
Probably affecting the idle rpm control and already noticed that someone touched the idle air control screw.