Is there a screw like on the AU 6's on an EF V8??

Thanks

If so where?? My car is sitting bonnet up and cannot find it.

There may be one on the underside of the radiator, drivers side. If you look through the plastic shield underneath, they may be a circle cut out of it and a tap above. Just have a look.

I'm not sure which had it, I've worked on a few falcons and only one or two have had one.

I usually just drop the lower hose. Makes a huge mess though....

If it's still stock it should be there? Some aftermarket rads don't have the plug so just pull the lower hose.