I have a problem with excessive oil pressure, it's an M30 engine

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Ok, I restored the whole engine, almost everyhting is new inside, rebuilt the whole thing, the oil pump is ok, the problem is that the pressure pops my camshaft seal out and my distrtibutor fills with oil, this happens after about a minute after the engine starts, could it be a faulty pressure relief valve ?, or something obstructed ?... my 735 is 1988 E32 euro, (the year of the menu did not go that fr back).