The jury's back, the verdict is a piss poor reading of not even 1bar other metre was faulty, I ended up removing the meter started the motor oil pertruded out the end at a slow pace bit like mine these days lol, I put my thumb on the end revved it slightly it did not build any pressure at all, the oil is circulating in the oil tank, I dropped the screens which were pretty clean no were else to turn now so its a totall breakdown, I would like to add at this point the head is brand new but the owner had it powder coated along with all the other casings which could be restricting the flow if they haven't plugged it up properly before they coated it, i was hoping maybe a wrong install off the oil pumps ect but this problem was exactly the same with the old system they took out.