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Success with new NGK spark plugs, and new wires from Lectric Limited. (I know - not a biggie, but it was fun doing something I could start and finish. Just had to get A/C compressor out of the way for #2, and even that was easy enough.)
These AC Delco plugs were old. They look older than the 4 years ago when I bought this from showroom place. But I think they look ok, considering. Just burned, no pitting, oil only on the threads, not down in.
Wires were nice, but I had to switch two of them. The distributor is rotated one position - something for another day.
While I was at it, these are scope videos down into cylinder 8. Any thoughts on these? I don't know enough if the piston seems ok or not?
Hi Bob. In the first video I can see the factory notch in the piston indicating original pistons. From both, I assume its a factory engine, with decent crotch hatching still left in that cylinder.
Great, thanks. I didn't know about cross hatching, so I'm reading about it now. I looked at 3 cylinders, and they all looked like this (this one the piston was down the farthest). The car is mostly factory from what I can tell. Notes with the purchase said a new short block and engine rebuild about 65K miles (I'm guessing mid-80s, from what I know about the car's history). Whether they kept or replaced the pistons, I don't know. Good to know the cylinders look like decent condition.
September 30th, 2022, 03:38 PM
