Mechanics

REMOVE AND REPLACE ENGINE

1994 Buick Century

Engine Mechanical problem
1994 Buick Century 6 cyl Front Wheel Drive Automatic 118000 miles

How difficult will removing and replacing this engine be? Can I do this in my garage? Does it require any special tools?
Avatar
Kingbball56
January 5, 2010.




CAUTION
The fuel system is under pressure and must have the pressure relieved prior to disconnecting the fuel lines. Failure to properly bleed the system can lead to personal injury.

Relieve the fuel system pressure.
Disconnect the negative battery cable. Scribe reference marks at the hood supports and remove the hood. Install covers on both fenders.
Remove the airflow tube at the air cleaner and throttle valve.
Drain the cooling system.
Disconnect and tag all vacuum hoses from all non-engine mounted components.
Disassemble the accelerator linkage and TV cable, then disconnect the cruise control cable, if equipped.
Disconnect the engine harness connector from the ECM/PCM and pull the connector through the front of dash. Disconnect the engine harness from the junction block at the dash panel.
Remove the engine strut bracket from the radiator support and position aside, as required.
Disconnect the radiator hoses from radiator and heater hoses from engine. Disconnect and plug the transaxle cooler lines.
Remove the serpentine belt cover and belt.
On vehicles with the air conditioning compressor mounted on the upper portion of the engine, remove the AIR pump and bracket. Then, remove the air conditioning compressor from the mounting bracket and position aside.
If equipped, remove power steering pump from engine and set it aside. Disconnect and cap any power steering lines.
Disconnect and plug the fuel lines.
Disconnect the EGR at the exhaust, as required.
Raise and safely support the vehicle.
On vehicles with the air conditioning compressor mounted on the lower portion of the engine, remove the air conditioning compressor from the engine. Do not discharge the air conditioning system.
Remove the engine front mount-to-cradle and mount-to-engine bracket retaining nuts, as required.
Disconnect and tag all electrical wiring at the starter. Remove the starter retaining bolts and remove the starter.
If equipped with automatic transaxle, remove the transaxle inspection cover and disconnect the torque converter from the flexplate.
Disconnect the exhaust pipe.
Remove the 1 transaxle-to-engine bolt from the back side of the engine.
Disconnect the power steering cut-off switch, if equipped.
Lower the vehicle.
Remove the exhaust crossover pipe.
Remove the remaining transaxle-to-engine bolts.
Support the transaxle by positioning a floor jack and a block of wood under the transaxle. Install an engine lift tool and remove the engine from the vehicle.

To install: Position the engine in the vehicle while aligning the transaxle. Install the transaxle-to-engine bolts.
Position the front engine mount studs in the cradle and engine bracket.
Remove the engine lift tool. Raise and support the vehicle safely.
Install the engine mount retaining nuts.
If equipped, connect the power steering cut-off switch.
Install the 1 transaxle-to-engine bolt from the back side of the engine.
Connect the exhaust pipe.
If equipped with automatic transaxle, connect the torque converter to the flexplate and install the transaxle inspection cover.
Install the starter and retaining bolts. Connect the starter electrical connectors.
Install the engine front mount-to-cradle and mount-to-engine bracket retaining nuts.
On vehicles with the air conditioning compressor mounted on the lower portion of the engine, install the air conditioning compressor.
Lower the vehicle.
Connect the EGR at the exhaust, if removed.
Connect the fuel lines.
If equipped, install power steering pump.
On vehicles with the air conditioning compressor mounted on the upper portion of the engine, install the air conditioner compressor. Install the AIR pump and bracket.
Install the serpentine belt cover and belt.
Connect the radiator and heater hoses. Connect the transaxle cooler lines.
Install the engine strut bracket to the radiator support.
Connect the engine harness connector to the ECM/PCM.
Connect the accelerator linkage and TV cable. Connect the cruise control cable, if equipped.
Connect vacuum hoses to all non-engine mounted components.
Install the airflow tube at the air cleaner and throttle valve.
Install the hood using the reference marks made upon removal.
Connect the negative battery cable.
Fill cooling system and check for leaks. Start the engine and allow to come to normal operating temperature. Check for leaks and refill the cooling system.



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