I'm looking for a little help on something. I have an ECI IO-360 parallel valve engine with 44 hours on it now. I've been breaking the engine in using the oil and oil change schedule recommended by ECI (Phillips 20/50 XC). I've been following their break in procedure running the engine between 65% and 75% power respecting CHTs. I've tried my best to keep them at or below 400. I haven't always been successful, the highest CHT I have seen is 445 for less than 30 seconds.
I'm 44 hours in now and the CHTs seem to have dropped a bit but oil usage is still 1 qt every 2-3 hours. I decided to pull the spark plugs and take a look inside to see if I could find any cause for the oil usage. What I found was vertical scoring on all of the cylinders but cylinder 2 was the worst. Below is what I found but I'm not sure of the cause.
I also noticed some black specks of material in the cylinder walls. I'm not sure if it's ring delimitation, broken rings, carbon buildup, or anything else.
I ran a compression check following the horoscope pictures and I found that cylinder 2 was 70/80. The other 3 cylinders were 78/80. On each of the cylinders, I could hear air through the breather tube but on number 2 it was much more noticeable.
These are ECI cerminil cylinders from a new engine build circa 2013.
Any ideas? Does this warrant pulling a cylinder and getting it to a cylinder shop?
For comparison, below are the pics of the other cylinders.
I'm 44 hours in now and the CHTs seem to have dropped a bit but oil usage is still 1 qt every 2-3 hours. I decided to pull the spark plugs and take a look inside to see if I could find any cause for the oil usage. What I found was vertical scoring on all of the cylinders but cylinder 2 was the worst. Below is what I found but I'm not sure of the cause.
I also noticed some black specks of material in the cylinder walls. I'm not sure if it's ring delimitation, broken rings, carbon buildup, or anything else.
I ran a compression check following the horoscope pictures and I found that cylinder 2 was 70/80. The other 3 cylinders were 78/80. On each of the cylinders, I could hear air through the breather tube but on number 2 it was much more noticeable.
These are ECI cerminil cylinders from a new engine build circa 2013.
Any ideas? Does this warrant pulling a cylinder and getting it to a cylinder shop?
For comparison, below are the pics of the other cylinders.