Yanamr 4LH-DTE position of oil pressure relief valve

[kapavkovic]

I have issue with high oil pressure on manual gauge attached on filter inlet. Pressure on idle is 5Bar and on 1800 rpm is 6.5 Bars
Many calls to local yanmar mechanocs bit nobody know position of valve itself
Please help
If somebody have pictures of position

 

[kapavkovic]

I found bolt on stb side of engine below oil cooler and close to oil filter inlet but inside bolt there is no spring.....if so should be low pressure not high