With over 8,000 hours on the good old East-West beasties, I have never had a fumes problem, only when the FO farted.
I think the problem was mainly female related. Like when they turn on the ovens after being cleaned and thinking the smell is engine related.
They could do with higher rated engines , but the poms build bloody strong airframes with big bolts.
Not related to this forum, but I wish we could turn the clock back to pre 89, East-West was the best. Maybe they should have closed Ansett and kept East-West.