I have used the compressed air on several engines (none of them big blocks)
and had no problems. One tip is to break the keepers free from the
retainer with light hammer taps on the edge so the air pressure on the head of
the valve doesn't have to withstand the initial force of breaking the keepers
free. A second tip is to take your time, do one cylinder at a time
and minimize the time the keepers are off the valve in case you lose air
pressure for some reason.
Rolland
Westra |