BK ASTRA 1.6 ROCKER COVER AND NEW PCV.
Holden bk 1.6 Astra genuine ROCKER cover - $350. The new PCV UNIT(include 2 orings) $350. If the RPM is high and unstable and there is a vacuum sucking sound, it is very likely that the diaphragm inside the cover is damaged, not the small valve at the top of the engine. It is very difficult to work with only a cheap diaphragm sold on the Internet. So, after purchasing the PCV unit and two O-rings, you can easily work by installing 5 bolts and 2 clips. Pick up in South Morang.