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

Seeped engine oil and previously leaked
drive shaft grease were baked into the surface of
some of the parts so
took ages cleaning the outside of the engine.
























After long hours,
finally I got to the stage where I was
happy to open the engine.
Some of the before/after photos.

At this stage, I won't wash the valve covers any further
while they are on the engine.
They will be washed again once they are off the engine.










As seen on many NSX,
the TB tension was bit loose but far better than
the last engine that I serviced.

All four cam timings were OK but
because of the loose TB, it was not perfect.

Surprisingly, the CRK/CYL sensor potting was
only just stated melting and not running down
the TB cover plate yet.

Will replace it with the new one and
return the existing one to the owner as the spare.









The Front bank.

The routing of the blowby gas passage was
changed when the red valve cover was introduced.

So, with the red valve cover model,
the front bank will be much cleaner than the rear bank.

The black liquid gasket that was not used when
building the NSX engine was applied in the wrong way and
also the mating surface was not degreased causing
more oil seepage.









The Rear bank.

Bit dirty but not too bad.

Just need to use fresh engine oil to
wipe the surface very well.


Hard to see in the above two photos but
lots and lots of black blowby contaminated oil
in the oil pockets.

Will be washed out thoroughly.








The limit of the standard service.

Almost all of the NSX that went through just
the standard service will have dirty valve cover.


Despite the regular oil change,
looks like these valve covers were never cleaned
when they were removed.

You can’t see them from outside and it won’t make any differences
on the engine performance but
those are the things that I specifically pay attention when
dealing with the engine and gbox.



I prefer keeping each parts (and workplace) clean and tidy.....



Now understood why the compression data showed
big deviation despite the low mileage.

Only checked #1 cyl because this is the most difficult cyl to
adjust the valve clearance especially on LEV model
while keeping the engine inside the bay.


All four clearance were way too wide.


I managed to even insert 0.21mm gauge into both
intake adjusters.



Will be carefully adjusted at the latter part of my
Engine Refresh service but for the time being,
all 24 adjusters are going to be backed off before
removing all four cam shafts.



More to follow later.

Kaz