How to remove a quad-4 water pump - 2000 Pontiac Grand Prix

if engine is 4 cyl quad 4, dont mess with is. water pump is timing chain driven.I even hater working on these engines.. high dollar repair..

cracked head or blown head gasket which they are notorious for

2.3L Engine

1. Disconnect the negative battery cable
2. Detach the oxygen sensor connector.
3. Properly drain the engine coolant into a suitable container. Remove the heater hose from the thermostat housing for more complete coolant drain.
4. Remove upper and lower exhaust manifold heat shields.
5. Remove the bolt that attaches the exhaust manifold brace to the manifold.
6. Break loose the manifold to exhaust pipe spring loaded bolts using a 13mm box wrench.
7. Raise and safely support the vehicle. NOTE: It is necessary to relieve the spring pressure from 1 bolt prior to removing the second bolt. If the spring pressure is not relieved, it will cause the exhaust pipe to twist and bind up the bolt as it is removed.
   
8. Remove the manifold to exhaust pipe bolts from the exhaust pipe flange as follows:
   1. Unscrew either bolt clockwise 4 turns.
   2. Remove the other bolt.
   3. Remove the first bolt.
9. Pull down and back on the exhaust pipe to disengage it from the exhaust manifold bolts.
10. Remove the radiator outlet pipe from the oil pan and transaxle. If equipped with a manual transaxle, remove the exhaust manifold brace. Leave the lower radiator hose attached and pull down on the outlet pipe to remove it from the water pump.
11. Carefully lower the vehicle.
12. Remove the exhaust manifold, seals and gaskets.
13. Loosen and reposition the rear engine mount and bracket for clearance, as required.
14. Remove the water pump mounting bolts and nuts. Remove the water pump and cover assembly, then separate the two pieces.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

From the fuel system troubleshooting guide - 1993 Oldsmobile Achieva

Inspect Fuel Pump Low Fuel Pressure.
Inspect Fuel Pump Relay - Faulty Fuel Pump Relay.
Inspect Fuel Injector Pressure Regulator - Faulty Fuel Injector Pressure Regulator.
Inspect Fuel Pump Strainer - Clogged or Dirty Fuel Pump Strainer.
Inspect Engine Control Computer - Incorrect Operating Information Being Delivered and Sent From The EEC.
Inspect Fuel Tank - Fuel Tank Empty.
Inspect Fuel Line - Fuel Line leaky/kinked/loose/disconnected
Inspect Fuel Fittings/banjo bolt(s) - leaky/loose fitting(s)

For your next posting, in 1993, Oldsmobile produced the Achieva with four engine types:
Available engines

• 4 Cylinders, VIN "3" 2.3L MFI SOHC Quad
• 4 Cylinders, VIN "A" 2.3L DOHC Quad 4 HO
• 4 Cylinders, VIN "D" 2.3L MFI DOHC Quad 4
• 6 Cylinders, VIN "N" 3.3L FI OHV

To find the engine type of your 93 Achieva, compare the 8th digit of your VIN code to the entries in the above table.

thermostat on the quad 4 engine is on the right hand rear side of the engine near water pump. hope this helps

If it is a quad 4 engine,it is under the water pump,area where the bottom hose connects.

it is driven off the timing chain, here is how you replace it
2.3L And 2.4L OHC Engines

• Disconnect the oxygen sensor harness connector
• Raise the vehicle and support it securely on jackstands
• Remove the exhaust manifold brace and loosen the exhaust manifold bolts
• Remove the radiator outlet pipe assembly to the water pump housing bolts and separate the assembly from the engine
• Remove the exhaust manifold pipe from the exhaust manifold
• Remove the radiator outlet pipe from the oil pan.On manual transaxles cars remove the exhaust manifold brace and keep the radiator inlet hose attached to the assembly.Pull down on the radiator outlet pipe in order to disengage the pipe from the water pump while leaving the radiator outlet pipe hanging
• Lower the car remove the brake booster vacuum hose from the camshaft housing also remove the exhaust manifold from the cylinder head
• Remove the timing chain cover from the engine
• Remove the timing chain tensioner
• Remove the water pump cover bolts from the engine block and the timing chain housing
• Remove the water pump bolts and separate the assembly from the housing

The water pump does not need to be timed.

The cam gears and crank gear are all that need to be timed together during reassembly

Check coolant, adjust drive belt, check radior core and radiator grill clean, remove and chweck thermostat, check cooling fan, check ignition timing, water ppump may be going out, improper grade engine oil.

Follow the top rad hose to the engine, where it connects that's the thermostat housing.