Peugeot 308 THP150 Workshop Manual

Hello everyone;
I have a lubrication problem in a Peugeot 308 THP150 Turbo. For some reason no oil reaches the taque of admission. I would like to know if someone has had this problem (frequent seems in this model) or if there is any workshop manual to track it.
Greetings

Hello, something similar happened to me with a 206 (it told me low oil pressure) I managed to solve it by changing the oil filter and see that the spring that goes at the base is not stuck.

Thanks for the answer. I made oil and filter change and does not indicate low oil pressure. I disassembled the valve lid and reached the exhaust cam, but little to the admission, and it is those valves that sound a lot. I suppose there will be some pipeline covered in that section (camshaft or butt), or simply downloaded taver. For that, the lubrication scheme would not be good, so as not to disassemble and spend more than necessary. Greetings.