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

As reported earlier, there was no point trying to save these heavily corroded spring loaded exh bolts and nuts.
Ideally, I wanted to break them at different position but the corrosion was so deep that they all snapped off in the middle. Will cut them off later.





Considering the mileage and being as OBD2 spec, recommended the owner to at least replace the 2 x primary O2 sensors. The owner told me that one of the four was replaced in the past but from the label, connector, etc, looks like it used the OEM one as the replacement and since the corrosion level looked similar on all four, couldn't tell which one was replaced in the past.
Will order the sensor from US with express delivery, I hope.
The fitting was already heavily corroded so I'll need to heat them up before removing them.

One of the O2 sensor connector was missing the internal retainer and WPC seal causing corrosion at the terminal. Will apply thin coat of dielectric grease.







Heavy oil seepage at both the front and reat bank.
Will clean them as much as possible.
Excess amount of black liquid gasket is sticking out under the valve cover and doesn't look nice. Also, looked to be not degreased well before the application that oil was seeping heavily.




CRK/CYL sensor potting melted. Nothing new and it won't cause any issues at this stage but there were very rare failure reports after almost all of the potting melted away so may consider replacing it depending on the level of remaining potting.






Needs serious cleaning around this area.



Will wash the engine today and start opening the engine.

More to follow later.


Kaz