XE oil pressure

[benton101]

i just got my red top into my corsa today and got it runnin when i statred it the oil pressure guage (mechanical) went up to 60psi then let it idle for a bit, when i reved it up and the oil pressure statred to drop. i shut the engine off and checked for leaks there was none and there was enough oil in it (up to the max)

i think it could be the pump or a but of crap stuck in the pipe.
and have been advised that it could be the oil pressure relief valve could be stuck open, but i dont know where that is or how to fix it?
any suggestions please

[comptoncj]

the relief valve is in the pump, very common failure on vauxhall engines, if you buy an oil pump repair kit it will come with a new relief valve, is the oil pressure dropping off the scale?

[benton101]

it got oil pressure then when it heated up a bit it started to gradualy drop and i shut it off then doesnt get any now

is it difficult to change the valve?