Oil Pressure Relief Seat

[njv]

hi
ok heres what ive done! i found some compression springs with a 10mm diameter fit inside the piston nicely they dont take to much pressure to compress . chopped it down so it was the same length uncompressed as the original spring (62mm long by the way) .

i then took the piston and resurface the face of it on a surface plate with wet and dry untill it was dead flat .

the results well cold i peg the 5 bar vdo and after 1/2 hour driving it seems to have raised my oil pressure by 10/15 psi.

idle with 80 0c oil temp is now 1 bar (14.5 psi) as oppose to the previous 7 psi according to my vdo.

this tells me that the resurfacing of the piston has the most to do with this as the piston would have not been moveing of the seat at idle before granted it certainly wont now with the inner spring added .

grand cost 2.50 euro 20 min of time now i have enough spring to make 4 more inners so im going to experiment with some different lengths allthough it seems to have worked out just fine as it is for now.

be good.