Oil pump replacement

ELDORADO Refrigerant Capacity and Refrigerant Oil Type

1998-02 32.00 Oz. R-134a; 9.00 Oz. PAG-150; w/ OE Harrison Compressor
1998-02 32.00 Oz. R-134a; 9.00 Oz. PAG-46; w/ Denso Compressor.
1994-97 32.00 Oz. R-134a; 8.00 Oz. PAG-150; w/ OE Harrison Compressor

This answer covers 1999-2005 Cadillac Deville, Eldorado & Seville.
Example Engine:
2002 Cadillac Seville STS 4.6L SFI DOHC HO 8cyl.

This engine has (2) Crankshaft Position (CKP) Sensors: the Upper sensor is CKP sensor B, and the lower sensor is CKP sensor A (this is included for the OBD-II DTC codes - P0385 references Sensor B = upper CKP sensor, whereas P0335 references the lower CKP sensor (sensor A)).

Both crankshaft position sensors are located in the front of the engine just above the oil filter adapter. To access both CKP sensors, jack up vehicle on the passenger side, remove the oil filter, and the oil filter adapter, including the Engine Oil Pressure (EOP) switch. See illustration.

The ARROW points toward Front of Car.
1. Upper Crankshaft Position Sensor (B).
2. Lower Crankshaft Position Sensor (A)
3. Engine Oil Pressure (EOP) switch
4. Engine Oil Level switch
The Oil Filter is the can-type object below the oil filter adapter, which includes the EOP switch. Recommend: remove oil filter with an oil filter socket/strap wrench, since it's close to the oil pan.

goto YouTube and paste the following into the YouTube search window and look at various videos covering your issue ( 1994 cadillac eldorado with a 4.6 northstar oil pan gasket change )

if its a northstar engine its1-2-7-3-4-5-6-8 if its a 4.9 engine its 1-8-4-3-6-5-7-2 in 1993 0nly the eldorado etc and the seville sts had the northstar engine

7 qts

What engine do you have? if its a Northstar engine then you need the special Northstar water pump socket before you can do anything

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

Have you unhooked the battery since you put the freon in? If not, do it.

I am assuming you have the Northstar engine.

Check for coolant flow at the Purge line,this is a common problem on the Northstar.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.

Are you running it without a thermostat? If so,then strangely enough,this will cause overheating as the Northstar cooling system is different to most conventional systems and therefore will not help you diagnose the problem.

The oil life resets to zero after the engine overheats. Check for external leaks first, make sure the water pump belt is still there and turning. The most likely cause if the car has over 70,000 miles is head gaskets.

First NORTHSTAR ( 1992 ) engines were quite troublesome, from faulty starters ( in the middle of the engine ) to loss of oil pressure.