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

Typical LMA noise on classic Honda engine. Inconsistent, comes and goes.
Especially noticeable around 0:40 - 0:45 and 0:56 - 1:05.




Small coolant seepage at the bottom side of the radiator.
As mentioned many times, it is a consumable parts and
must be replaced after some years.




Famous grease leakage from the inner joint of the right drive shaft.




Popular crack at the defrost panel.




The tube at #5 and #6 IG coils showed some split.
In fact, the one at #6 cyl came off.








Looks like someone smoothed out the rust on the IG coils at the rear bank.
Similar things observed at the spark plugs as well.

The rust at the metal body was removed in the past as
there were lots of markings there.

Unlike the light brown marking of the corona arching,
there was dark brown rust at the #1 and #2 plugs.
Clear sign that these plugs were submerged in the water.

Although the spark terminals and insulator looked fine,
going to replace all six plugs this time.




Compression check.
Full data has been sent to the owner through email.

[psi]
#1: **4, #2: **2, #3: **7, #4: **7, #5: **0, #6: **2

The deviation between the cyl was large but well within the window
and not too bad considering the fact that the clearance was not
adjusted for many years/miles.




Wow, what a thick gunk behind the TH butterfly.
Looks like the butterfly itself was washed in the past but not the body.

I think I must take the TH body off the engine in order to clean it.
Normally, I just wash the TH body using the carburetter cleaner before
starting the engine and also while keep running the engine but for this one,
I don’t think it is a good idea to let these thick debris to be swallowed
into the engine.