As angel stated, pressures are to high provided your gauges read correctly.
On the 680 and 800 engines, 1.2 bar (17.4 psi) at 500 rpm and 2.4-2.5 bar (36.25 psi) at 4000 rpm.
On the 688 Cleon-Fonte (Sierra) engines, 0.7 bar (10 psi) at stationary rpm and 3.5 bar (50 psi) at 4000 rpm.