REMOVAL & INSTALLATION
PREMIER AND MONACO
See Figures 1, 2, 3 and 4
- Disconnect the negative battery cable.
- Remove the timing chain cover assembly. Refer to these procedures later in this section.
- Once the timing covers are removed from the engine, use a socket with a diameter slightly smaller than the oil seal's diameter and tap the old crankshaft oil seal out of the cover.
- Rotate the crankshaft until the crankshaft key is pointing up.
- Remove the oil pump sprocket mounting bolts. They may have a thread lock on them.
- Clean the thread lock from the bolts.
- Remove the chain sprocket and chain.
- Remove the oil pump cover bolts and remove the oil pump cover.
- Remove the split key from the oil pump cover. Remove the retainer, the spring and the relief valve. Check the condition of all parts. If any part shows excessive wear, the complete oil pump must be replaced with a new one.
- Coat with clean oil and install the relief valve, the spring and the retainer into the oil pump cover. When installing the relief valve, the open end must face the spring.
- Install the split key.
- Lubricate the driven gear idler shaft with clean engine oil.
- Install the driven gear over the idler shaft.
- Install the oil pump cover. Tighten the bolts to 9 ft. lbs. (12 Nm).
- Prime the oil pump by squirting oil through the hole (A) below the oil filter connector.
- Fill the oil filter with clean engine oil and install it on the engine.
- After the timing chains have been installed (if they were removed), install the oil pump sprocket and the chain. Coat the threads of the sprocket mounting bolts with Loctite® 271 and tighten the bolts to 53 inch lbs. (6 Nm).
- Install the timing chain covers and related components as outlined later in this section. Once the timing chain covers are installed, use the special tool 6077 to install the new crankshaft oil seal. Make certain to lightly oil the seal prior to installation.
- Connect the negative (-) battery cable.
See Figures 5, 6, 7 and 8
The oil pump assembly is mounted on the timing belt end of the engine block with the inner pump rotor indexed and installed on the crankshaft nose. The oil pump case also retains the crankshaft front oil seal and provides oil pan front end closure.
- Disconnect the negative battery cable. Remove the dipstick.
- Raise the vehicle and support safely on jackstands.
- Refer to the timing belt removal procedure appearing later in this section and remove the timing belt.
- Remove the crankshaft balancer and sprocket from the crankshaft.
- Drain the engine oil and remove the oil pan from the engine (refer to the preceding procedure).
- Remove the oil pick-up from the oil pump case.
- Remove the oil pump mounting bolts and remove the pump from the front of the engine. Note the different length bolts and their positions in the pump for installation.
- Use a small prytool to pry the old oil seal out of the oil pump case. Make certain not to scratch or damage the oil seal mounting surfaces.
- Clean the gasket mounting surfaces of the pump and engine block.
- Prime the pump by soaking its components with fresh oil and turning the rotors or, using petroleum jelly, pack the inside of the oil pump. Using a new gasket, install the oil pump on the engine and torque all bolts to 10 ft. lbs. (13 Nm).
- Using the front crankshaft oil seal installer special tool MB998306 or equivalent, install the new oil seal in the oil pump.
- Install the balancer and crankshaft sprocket to the end of the crankshaft.
- Install the oil pump pick-up and oil pan as described earlier in this section.
- Install the timing belt and all related parts.
- Lower the vehicle.
- Install the dipstick. Fill the engine with the proper amount of oil.
- Connect the negative battery cable.
- Check the oil pressure by using a gauge at the oil pressure switch location. Oil pressure should be 6 psi. (41 kPa) at idle or 35-75 psi. (241-517 kPa) at 3000 rpm.
- Remove the pressure sending unit and install the oil pressure gauge unit back into the engine.
- Warm the engine at high idle until the thermostat opens, then check for any oil leaks.
3.3L and 3.8L Engines
See Figures 9 through 15
It is necessary to remove the oil pan, oil pick-up and Chain Case Cover (CCC) to service the oil pump rotors. The oil pump pressure relief valve can be serviced by removing the oil pan and oil pick-up tube.
- Disconnect the battery negative cable.
- Drain the cooling system. Refer to General Information & Maintenance for this procedure.
- Support the engine and remove the right engine mount.
- Raise and safely support the vehicle on jackstands.
- Drain the engine oil.
- Remove the oil pan and oil pump pick-up. It may be necessary to remove the transaxle inspection cover.
- Remove the right wheel and inner splash shield.
- Remove the accessory drive belt (serpentine).
- Remove the A/C compressor and set aside with the hoses still attached.
- Remove the A/C compressor mounting bracket.
- Use a claw-type puller and remove the crankshaft pulley and damper. Make sure to only pull on the inner hub area of the damper only.
- Remove the idler pulley from the engine bracket.
- Remove the engine bracket.
- Remove the camshaft sensor from the chain case cover.
- Remove the chain case cover from the engine block.
- The rest of the procedure deals with the chain case cover, to which the oil pump is attached. Refer to the oil pump overhaul procedures.
- Be sure that the mating surfaces of the chain case cover and the cylinder block are clean and free from burrs. The crankshaft oil seal must be removed to ensure correct oil pump engagement. Remove the oil seal as follows: using a punch, tap the oil seal out of the case cover from the inside toward the outside of the case.
- Rotate the crankshaft so that the oil pump drive flats are vertical.
- Position the oil pump inner rotor so that the mating flats are in the same position as the crankshaft drive flats.
- Install the cover onto the crankshaft using a new gasket and O-rings. Make sure that the oil pump is engaged on the crankshaft correctly or severe damage may result.
- Install the chain case cover bolts and tighten to 20 ft. lbs. (27 Nm).
- Use the crankshaft oil seal installing tool C-4992 to install a new crankshaft oil seal. Place the seal into the opening with the seal spring towards the inside of the engine. Install the seal until flush with the cover.
- Install the crankshaft pulley/damper using plate L-4524, 5.9 in. (15cm) bolt and the thrust bearing and washer.
- Install the engine bracket and tighten the bolts to 40 ft. lbs. (54 Nm).
- Install the idler pulley on the engine bracket.
- Install the camshaft sensor to the chain case cover. Refer to Driveability & Emissions Controls for this procedure.
- Install the A/C compressor mounting bracket and compressor. Refer to Engine Electrical for this procedure.
- Install the serpentine accessory drive belt.
- Install the inner splash shield and wheel.
- Install the oil pump pick-up and oil pan. Refer to the previous procedures.
- Install the transaxle inspection cover if removed.
- Lower the vehicle and install the engine mount.
- Fill the crankcase with oil to the proper level.
- Tighten the wheel lug nuts.
- Fill the cooling system as described in General Information & Maintenance .
- Connect the battery negative (-) cable.