oil pressure
 

As my head gasket had gone , the oil pressure was reduced by poor oil quality , what else can cause low oil pressure , i am also changing the big end shells , do i need to change the oil pump as well , and what should be a normal oil pressure on the gauge when engine is at normal running temp any help would be appreciated

At start up cold 40psi about 15-20 when warmed up, under load 40-60. I've read the Turbo`s are slightly lower but having owned both I've not notice any different until my big ends went big time.Oil pumps are about ?80 GBP from Toyota plenty on ebay from the US new. Where in England are you ?

oil pressure
 

Thanks for you input bill ,in answer to your question , i live in the north east of England near Durham city , in an old pit village called Easington Lane.