James Clark

Ok, so I have a 2002 5.3 swapped into my 2006 jeep lj. It's a junkyard motor as it's used and I don't have any accurate history for it. Its currently running fine and is daily driven. Initially it had 862 heads on it but the #4 exhaust valve was burnt so 5o minimize downtime I picked up a set of 706 (non casetech) heads and swapped them on. They were che led by a machine shop for cracks and such and were good so I put them on. Used the felpro MLS gaskets. Since the swap my oil pressure has been running on average about 10psi less than before the swap. I have no idea why since nothing else was done except a plug change at the same time.
Anyone have any thoughts for me?

00pooterSS

iTrader: (40)

Sounds like it's coincidental. I had a similar situation after doing an intake swap one day and had dinged the oil pressure sending unit.