Since putting the let into my corsa i had low oil pressure problems.
I took the engine back out and rebuilt the bottom end with new mains bearings and big ends, fitted a new genuine oil pump with sbd nylon relief valve.
I checked the pick up pipe for blockages, and also double checked i re fitted with the rubber o ring.
all new gaskets were used during the build.
Ive had the engine in and primed the pump etc. had it turning over with no fuel relay.
When i cam to firing it started first turn and sounded quiet witht he oil pressure reading above 40 psi/3 bar on cold idle. after 10 minutes or so it had dropped to about 25 psi/2 bar. I kept the car running untill the top end started getting tappy and the pressure kept dropping.
AS i've had this problem before i switched it off as dont want to do any more damage, oil pressure light is wired in correctly too so know it didnt get dangerously low.
now i've just had the rocker off and had the engine turning over, oil flows straight upto the exhaust cam and coats it lovely.. the inlet cam on the other hand is dry as a nuns .... i know this isnt right and there is an underlying problem has anyone got any suggestions of what i should now look for to get this sorted ?
Any help much appreciated