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The drop in oil pressure at idle is typically due to increased rod and main bearing clearance.
Extra clearance due to wear in the oil pump housing will also create this situation.
At higher engine speeds the pump moves enough oil to maintain pressure dispite the wear.
The engine may operate like this for extended periods.
Replacing the pump may postpone the needed rebuild.
You need to do a mechanical oil pressure test to verify the real pressure numbers, then you might consider doing a good engine flush to see it it will improve, if that doesn't help, pull the oil pan, clean and inspect, especially the oil pick up tube that are known to plug up.
Mike
__________________
Mike
Retired service manager. Member of the Solihull Society, NCLR club, SCLR and Santa Barbara 4 Wheelers.
99 D2, 3" lift, CDL with a Detroit and T.T. lockers, H.D. axles, 4:11 gears, Custom front and rear bumpers, sliders, Warn winch, and 5 HID's.
Need Parts? paulgrant@mac.com, or 203-770-1699 willtillery@roverguy.com, or 434-251-9331
Paul PTSchram 260-804-0458
PM Marty(Drillbit)[url]http://www.landroversonly.com/forums...o=newpm&u=5940
British Parts of Utah, http://www.bputah.com/
Lucky8, http://lucky8llc.com/
Low oil pressure
