Install new batteries

1. Disconnect the negative battery cable.
2. Remove the upper intake manifold.
3. On the 3.0L DOHC engine, remove the ignition wire cover.
4. Remove the ignition wires and spark plugs.
5. Remove the crankcase ventilation tubes from both valve covers.
6. Remove the retaining nuts and engine wiring from both valve covers and move aside.
7. Remove the valve cover retaining bolts and studs.
8. Remove both valve covers from the engine.

To install:

1. Clean the valve cover gasket sealing surfaces.
2. Install new valve cover gaskets onto the valve covers.
3. Place the valve covers into position.
4. Reinstall the valve cover retaining bolts and studs and tighten in sequence to:
   
   3.0L SOHC engine: 7 ft. lbs. (9 Nm)3.0L DOHC engine: 42-54 inch lbs. (4-5 Nm)3.5L engine: 30 inch lbs. (3 Nm)
5. Install the engine wiring and tighten the retaining nuts.
6. Install the crankcase ventilation tubes into both valve covers.
7. Install the ignition wire separators, the ignition wires, and the spark plugs.
8. On the 3.0L DOHC engine, install the ignition wire cover.
9. Install the upper intake manifold as described in this section.
10. Connect the negative battery cable.
11. Run the engine and check for leaks and proper operation.

It's a bit of a pain but here is what you set it to:

Aligning the marks on the flywheel with the marks on the flywheel cover

Driver side timing belt (No. 2) and No. 2 tensioner-1.8L engine

Passenger side timing belt (No. 1) and No. 1 tensioner

1. Disconnect the negative battery cable.
   
2. Loosen the water pump pulley mounting bolts.
   
3. Loosen the alternator mounting bolts and remove the alternator belt.
   
4. Remove the water pump pulley bolts and remove the water pump pulley.
   
5. Disconnect the electrical harness from the oil pressure switch.
   
6. Remove the dipstick tube.
   
7. Remove the crankshaft pulley.
   
8. Remove the timing belt cover plate, if equipped.
   
9. Remove the timing belt cover bolts on the left, right, and center covers.
   
10. Remove the timing belt covers.
    
11. Remove the rubber cover seal. Clean all mating surfaces.
    

To install:

1. Install a new timing belt cover seal.
   
2. Install the timing belt covers on the engine using the mounting bolts. Tighten the bolts to 48 inch lbs. (5 Nm).
   
3. Install the timing belt cover plate, if removed.
   
4. Install the crankshaft pulley, and tighten the bolt to 69-76 ft. lbs. (93-103 Nm)
   
5. Install the dipstick tube.
   
6. Connect the electrical harness to the oil pressure switch.
   
7. Install the water pump pulley and loosely install the mounting bolts.
   
8. Install the drive belt and adjust the tension as necessary. Tighten the alternator mounting bolts.
   
9. Tighten the water pump pulley mounting bolts.
   
10. Connect the negative battery cable.
    

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with the engine "stone cold," disconnect battery, remove valve cover, disconnect glow plug connector, remove glow plug with a 10 mm deep socket, install new glow plug (torque to 13 ft.-lbs.), and reattach connector. After finishing the remaining 3 glow plugs on that bank, clean valve cover, install new gasket, and reinstall valve cover. Do the same thing for the other bank of glow plugs and reconnect battery. Not a difficult job--should take several hours.

Below is the procedure for an Aston Martin Vantage, perhaps the vanquish is similar?

Removal
1. Power the driver's fully forward.
2. Remove rear compartment cover.
3. Loosen and disconnect battery terminals, earth (- ve)
terminal first.
4. Release rear carpet, studs (x2), move carpet aside.
5. Remove screws (x2), battery compartment cover to
support rail.
6. Remove nuts (x2), battery compartment cover to body.
Remove cover.
7. Remove Torx screws (x4), remove battery clamps (x2).
8. Disconnect battery vent tube.
9. With assistance, remove battery.
Installation
1. Clean battery tray and clamps.
2. With assistance, install battery into its compartment.
3. Connect battery vent tube.
4. Position battery clamps (x2), install and torque tighten
Torx screws (x4).
5. Ensure battery vent tube is not distorted by battery.
6. Install battery terminals, tighten terminal nuts to correct
torque.
7. Install battery compartment cover, install and tighten
screws (x2) and nuts (x2).
8. Position rear carpet, secure with studs.
9. Install rear compartment cover.
10. Reposition driver's seat.
Courtesy of pistonheads.com

Please vote if this helps! Thanks, Mike

the battery is inside the drivers front wheel well behind the inner fender.remove the bolts holding the inner fender to the outer fender and there is a couple that hold the front of it under the car towards the front of the car.pull the inner fender out of the way and the battery is sitting on a plate under a plastic cover.remove the battery cables from the battery and remove the cover,next remove the battery hold down bracket(i think or remove the bracket then cover) and remove the battery.re-install in reverse order.

Rocker Arm (Valve) Cover REMOVAL & INSTALLATION 2.3L 4-Cylinder Engines

1. Disconnect the negative battery cable.
2. Label and remove the spark plug wires.
3. Remove the attaching bolts for the valve cover.
4. Remove the valve cover from the cylinder head. If necessary, lightly tap the valve cover with a soft hammer to aid in removal. To install:
   
5. Thoroughly clean the valve cover and cylinder head gasket mating surfaces.
6. Install the valve cover on the cylinder head using a new gasket.
7. Tighten the valve cover bolts to 14 ft. lbs. (20 Nm) in a crisscross pattern.
8. Install the spark plug wires.
9. Connect the negative battery cable.
10. Start the engine and check for leaks. Fig. 1: Valve cover and gasket assembly
    

2.8L 6-Cylinder Engine

1. Disconnect the negative battery cable.
2. The following steps are necessary if your car has A/C and if you are removing the passenger side valve cover, if you do not need to remove the passenger side valve cover, skip them.
   1. Remove the A/C compressor belt and the compressor from the mounting bracket located on the passenger side of the engine. Do not remove the lines from the compressor.
   2. Place the compressor with the lines attached on the passenger side front shock tower and secure.
   3. Remove the compressor bracket.
3. Remove the air cleaner-to-throttle body hose.
4. Label and remove all necessary electrical and vacuum connections.
5. Remove the attaching bolts for the valve cover(s).
6. Remove the valve cover(s) from the cylinder head(s). If necessary, lightly tap the valve cover with a soft hammer to aid in removal. To install:
   
7. Thoroughly clean the valve cover(s) and cylinder head gasket mating surfaces.
8. Install the valve cover(s) on the cylinder head(s) using new gaskets.
9. Tighten the valve cover bolts to 11 ft. lbs. (15 Nm) in a crisscross pattern.
10. Install all necessary electrical and vacuum connections.
11. Install the air cleaner assembly.
12. Install the A/C bracket (if removed).
13. Install the A/C compressor and belt (if removed).
14. Connect the negative battery cable.
15. Start the engine and check for leaks.

2.3L and 2.4L 5-Cylinder, and 2.9L 6-Cylinder Engines The 2.3L and 2.4L 5-cylinder, and 2.9L 6-cylinder engines have a two-piece cylinder head, the upper half and the lower half. The upper half is basically the same as a valve cover, except that it incorporates the bearing caps for the camshafts into the underside.

1. Disconnect the negative battery cable.
2. Remove the spark plug access cover.
3. Label and remove the ignition coils and vent hoses or the distributor cap and wires if equipped.
4. Check the cam alignment before removing the cylinder head.
5. Remove the bolts attaching the upper cylinder head.
6. Remove the upper cylinder head, lightly tap with a soft hammer if necessary. To install:
   
7. Thoroughly clean the upper and lower cylinder head gasket mating surfaces.
8. Apply liquid sealing compound to the upper cylinder head mating surface. WARNING
   Use a roller or your finger to spread sealant, do not use an excessive amount of sealant, or the oil passages could become clogged.
   
9. Place the upper cylinder head onto the lower cylinder head.
10. Check the cam alignment before tightening the cylinder head.
11. Install Volvo tool number 5454 or equivalent to the upper cylinder head.
12. Tighten the nut on the tools to seat the upper cylinder head.
13. Tighten the upper cylinder head bolts, beginning from the center out to 13 ft. lbs. (17 Nm).
14. Install the ignition coils and hoses or the distributor cap and wires.
15. Install the spark plug access cover.
16. Connect the negative battery cable.
17. Start the vehicle and check for leaks. Fig. 2: Remove the clamp and detach the vent hose
    Fig. 3: Remove the spark plug cover and the plug wires or ignition coils to access the retaining bolts
    Fig. 4: Remove the retaining bolts
    Fig. 5: A light tap with a soft-faced hammer is usually required to loosen the valve cover
    Fig. 6: Carefully lift the upper cylinder head up and off the lower section. Note the integral camshaft bearing caps in the casting
    

Removal & Installation To Remove:

1. Disconnect the negative battery cable.
2. Drain the coolant from the engine.
3. Recover the refrigerant.
4. Remove the glove compartment.
5. Remove the floor air outlet.
6. If equipped with a diesel engine, remove the powertrain control module.
7. Remove the kick panel trim.
8. Remove the blower motor.
9. Remove the steering column.
10. Tilt back the instrument panel assembly.
11. Remove the coolant recovery reservoir from the engine compartment.
12. Disconnect the heater hoses and the evaporator tube.
13. Remove the accumulator.
14. Remove the fasteners and the HVAC module assembly.
15. Remove the cover plate on the bottom of the HVAC module.
16. Remove the heater core and seal from the HVAC module.
17. Remove the case cover from the HVAC module.
18. Remove the evaporator core.

HVAC module mounting fastener locations

HVAC module components

To Install:
NOTE: If a new evaporator is being installed, add 3 fl oz (90 ml) of refrigerant oil to the new evaporator.

1. Install the evaporator core.
2. Install the case cover.
3. Install the heater core and the seal.
4. Install the cover plate on the bottom of the evaporator case to the HVAC module.
5. Install the HVAC module in the vehicle.
6. Install the accumulator.
7. Connect the evaporator tube and heater hoses.
8. Install the coolant recovery reservoir.
9. Install the instrument panel.
10. Install the steering column.
11. Install the blower motor and cover.
12. Install the kick panel trim.
13. Install the powertrain control module and tray.
14. Install the floor air outlet.
15. Add coolant to the cooling system.
16. Connect the negative battery cable.
17. Evacuate and charge the A/C system.
18. Check the system for leaks.

Fig. 1: Water pump mounting and bolt torque specifications-3.5L engine shown


REMOVAL & INSTALLATION
The radio may have a coded theft protection circuit. Make sure you have the code before disconnecting the battery, removing the radio fuse, or removing the radio.
1.8L Engines

1. Disconnect the negative battery cable.
2. If applicable, remove the front under panel.
3. Gradually release the system pressure by slowly and carefully removing the radiator cap. Be sure to protect your hands with gloves or a shop rag.
4. Drain the engine coolant into a sealable container.
5. Remove the timing belt from the engine.
6. Remove the camshaft pulleys and remove the back cover.
7. Unfasten the five water pump mounting bolts, then remove the water pump.
8. Remove and discard the old O-ring.
9. Remove the dowel pins from the oil water pump.
10. Clean the O-ring groove and the water pump mounting surface on the engine.
    

To install:

1. Install the dowel pins to the new water pump.
2. Position a new O-ring to the new water pump, Apply a small amount of sealant to the O-ring to hold it in position.
3. Place the new water pump on the engine and install the mounting bolts. Tighten the mounting bolts to 104 inch lbs. (12 Nm).
4. Install the back cover and the camshaft pulleys.
5. Install the timing belt.
6. Fill the engine with coolant and bleed the air from the cooling system.
7. Connect the negative battery cable and enter the radio security code.
8. Run the engine and check for cooling system leaks.
   

2.2L, 2.3L, 2.5L, 3.0L, 3.2L and 3.5L Engines
Perform this service operation with the engine cold.

1. Disconnect the negative battery cable.
2. Remove the front splash panel and release the system pressure by slowly removing the radiator cap.
3. Drain the cooling system.
4. Remove the timing belt. Inspect the timing belt for any signs of damage or oil and coolant contamination. Replace the timing belt if there is any doubt about its condition.
5. On 1996-97 3.2 TL and 1996-00 3.5 RL models, remove the left camshaft pulley and back cover.
6. On 1997-00 3.0 CL models and 1999-00 3.2 TL models, remove the timing belt tensioner.
7. Remove the water pump bolts. Then, remove the water pump and sprocket assembly from the engine block. Remove the O-rings from the water passage.

To install:

1. Before installation, be sure all gasket and O-ring groove surfaces are clean.
2. Install the water pump with a new O-ring. Use new bolts and tighten the 6mm mounting bolts evenly to 104 inch lbs. (12 Nm) and the 8mm bolts to 16 ft. lbs. (22 Nm).
3. If removed, install the timing belt rear cover and camshaft pulley.
4. If removed, install the timing belt tensioner.
5. Install the timing belt and timing belt covers.
6. Install and adjust the tension of the accessory drive belts.
7. Close the cooling system drain plug. Refill and bleed the cooling system.
8. Connect the negative battery cable.
9. Start the engine, allow it to reach normal operating temperature, check for leaks, and top off as necessary.
10. Enter the radio security code.

Hope this helps (remember comment and rated this).

REMOVAL & INSTALLATION

1C-LTC and 2CL-TC Engines
(see Figures 1 and 2)

1. Disconnect the negative battery cable. Remove and label all electrical wiring, connectors and vacuum hoses necessary to gain removal clearance.

Fig. 1: Loosen and remove the cylinder head cover retaining nuts

1. Disconnect the PCV hose.
2. Remove the six nuts and seal washers from the cylinder head cover. Loosen them in a crisscross pattern.
3. Remove the cylinder head cover and the cover gasket from the cylinder head. Discard the gasket and replace with a new one.
   

To install:

1. With a wire brush or gasket scraper, remove all the old gasket material from the cylinder head and the cylinder head cover gasket surfaces.
2. When the cylinder head surfaces are free and clean, apply beads of sealant to the cylinder head in the locations shown in the accompanying illustration.

Fig. 2: Be sure to apply sealant on the cylinder head prior to cover installation

1. Install the new gasket in the cover. Make sure that the gasket seats evenly.
2. Place the cover with the gasket onto the cylinder head.
3. Install the six nuts and seal washers. Tighten the nuts to 65 inch lbs. (8 Nm).
4. Connect the PCV hose. Connect all removed vacuum hoses, connectors and electrical wiring. Connect the negative battery cable.
5. Start the engine and inspect for oil leaks. Repair any leaks as necessary.

Hope this help (remember comment and rated this).

This MAY seem Strange But It IS ALL necessary for Oil Pump Replacement. And Please Don't Forget to Rate Me as Most Folks Do Not. Thank You and GOOD LUCK with the Oil Pump Job Also


OIL PUMP
It is necessary to remove the oil pan, oil pickup and chain case cover to service the oil pump rotors. The oil pump pressure relief valve can be serviced by removing the oil pan and oil pickup tube. Refer to Timing Chain Cover Removal and Installation for procedures.

DISASSEMBLY

1. To remove the relief valve, proceed as follows:
2. Drill a 3.175 mm (1/8 inch) hole into the relief valve retainer cap and insert a self-threading sheet metal screw into cap.

1. Clamp screw into a vise and while supporting chain case cover, remove cap by tapping chain case cover using a soft hammer. Discard retainer cap and remove spring and relief valve.
2. Remove oil pump cover screws, and lift off cover.
3. Remove pump rotors.

1. Wash all parts in a suitable solvent and inspect carefully for damage or wear.

Oil Pump Assembly

1. Assemble pump, using new parts as required. Install the inner rotor with chamfer facing the cast iron oil pump cover.
2. Tighten cover screws to 12 Nm (105 inch lbs.).
3. Prime oil pump before installation by filling rotor cavity with engine oil.
4. Install chain case cover. Refer to Timing Chain Cover Installation.

REMOVAL of Timing cover
REMOVAL

1. Disconnect negative cable from battery.
2. Remove timing chain cover.

REMOVAL Of Oil Pan to gain Access to OIL PUMP

1. Disconnect negative cable from battery and remove engine oil dipstick.
2. Raise vehicle on hoist and drain engine oil.
3. Remove bending brace to transaxle attaching bolt.
4. Remove bolts attaching dust cover to transaxle housing. Lower dust cover to gain access to oil pan bolts.
5. Remove oil pan screws and remove oil pan.

INSTALLATION

1. Clean surfaces and apply a 1/8 inch bead of Mopar (R) Silicone Rubber Adhesive Sealant or equivalent, at the parting line of the chain case cover and the rear seal retainer.
   1. Use a new pan gasket.
   2. Install pan and tighten screws to 12 Nm (105 inch lbs.).
   3. Install dust shield and bending brace to transaxle housing.
   4. Lower vehicle and install oil dipstick.
   5. Connect negative cable to battery.
   6. Fill crankcase with oil to proper level.