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

Time for the compression check.
Full data was already sent to the owner.
The deviation between the cyl was bit large but nothing alarming so hope I can improve it through my Eng Refresh.













By the way, spark plugs at #2, 3, 5 and 6 cyl were really loose.
At the base of plug, you can even see some blow off markings.

Also, unlike the usual light brown corona arching marking, these spark plugs showed dark brown rust.
Because of the digital camera effect, it may look not dark brown but it was clearly rust when looked at directly.
Although the centre and GND terminals looked fine, I'm going to replace them all.











As same as on the plug, there was clear sign of moisture near the vent hole of the IG coil.

Having said this, the condition of metal core was very good even at the rear bank ones.
Could be replaced in the past or someone smoothed the rust out???