This cam looks pretty old. The type without holes in the lobe…
#1 IN Scuffing present
#1 EX Scuffing present
#2 EX Scuffing present
#2 IN OK
#3 EX Scuffing present
#3 IN Trace scuffing present
#4 EX OK, but the contact looks tight.
#4 IN Trace scuffing present
Overall, there was scuffing across the board. At this level, there aren’t any major issues. When it gets worse, you get a sound like “brrrrrrr~” that anyone would notice is wrong, so you’d know right away.
The engine oil looks like it’s been changed regularly. It’s clean.
Next, I’ll adjust the valve clearance, shine a light to check for any dropped parts or issues, and then close it up.
It’s better to look clean even if it’s not, so I’ll paint it and reuse it.
These two-electrode plugs don’t seem to offer any real performance gain, so I’ll replace them with standard JR8B plugs.
By the way, when you widen the gap on these two-electrode plugs, do you widen both sides?
I do it gently to avoid putting too much stress on them—”gently~”.
