Arlene1965
New member
Don't see how blow-by can be an issue, my compression is excellent (165-170). I had a blow-by issue one time before the rebuild, had broken compression rings. It did result in fluctuating pressure and fouled plugs, so I can see how it would be something to consider. All kinds of weird internal pressures on that occasion. Actually had exhaust blowing out of the oil-fill tube. But that problem was obvious, compression in the affected cylinder was barely 50, and replacing the piston solved it immediately. With the recent rebuild I had the cylinders bored out with new pistons and rings. With the resultant good compression I am not inclined to think blow-by is the cause.
For now I am leaning toward the PCV / internal airflow possibilities. Will experiment a bit.
For now I am leaning toward the PCV / internal airflow possibilities. Will experiment a bit.