okmike
FRIEND
Pryor, OK
WSH
I've read the Service Bulletin. Are the low compression readings related to the O-470-U and is it due to the different pistons with steel ring lands they used in the U model?
Also can someone tell me how does the differential pressure tester with the Master Orifice Tool discussed in the S.B. work? How is it different?
It's my understanding the O-470-U was used from 1977 to 1981 when they quit building the 180 and it was a higher compression engine that ran at a lower (2400) rpm.
I've read the Service Bulletin. Are the low compression readings related to the O-470-U and is it due to the different pistons with steel ring lands they used in the U model?
Also can someone tell me how does the differential pressure tester with the Master Orifice Tool discussed in the S.B. work? How is it different?
It's my understanding the O-470-U was used from 1977 to 1981 when they quit building the 180 and it was a higher compression engine that ran at a lower (2400) rpm.