TROUBLE SHOOTING
Note. To trouble shoot engine mechanical components, see appropriate table in TROUBLE SHOOTING article in GENERAL INFORMATION.
Removal (Nova)
- Mark hinges for reinstallation and remove hood. Disconnect negative battery cable. Drain cooling system, engine oil and transmission fluid or gear oil.
- Remove air cleaner assembly. Disconnect upper radiator hose at outlet. Disconnect overflow hose. Disconnect coolant hose at cylinder head rear of coolant pipe.
- Disconnect coolant hose at thermostat housing. Disconnect fuel hoses at fuel pump. Remove alternator, power steering belt and A/C belt (if equipped). Disconnect necessary wires at engine and vacuum hoses.
- Disconnect wires at transaxle. Disconnect speedometer cable at transaxle. Raise and support vehicle. Disconnect exhaust pipe at manifold. Disconnect air hose at converter pipe (Federal vehicles). Disconnect transaxle cooler lines at radiator and remove right and left under covers.
- Disconnect power steering pump and A/C compressor and lay aside (if equipped). Disconnect speedometer cable and bracket at transaxle. Disconnect steering knuckles at lower control arms.
- Disconnect drive shafts at transaxle. Remove flywheel cover. Remove flexplate-to-torque converter bolts. Disconnect front and rear mounting at center member. Disconnect cable and remove center member.
- Lower vehicle. Remove radiator with fan. Install engine lifting device. Remove right motor mount through bolt. Remove left transaxle mount bolt and mount. Remove engine and transaxle.
Installation
To install, reverse removal procedure.
- Disconnect battery cable. Drain cooling system. Remove air cleaner. Remove window washer bottle.
- Disconnect accelerator and TV cables. Disconnect ECM harness at engine. Disconnect radiator and heater hoses at engine. Disconnect all vacuum hoses at engine. Disconnect engine harness at bulkhead connector.
- Remove exhaust heat shield. Remove A/C adjustment bolt at motor mount (if equipped). Remove alternator and power steering belts. Disconnect fuel lines. Raise and support vehicle.
- Remove inner fender splash shield. Remove A/C brace and compressor (if equipped). Remove flywheel shield. Remove starter wires, front brace, and starter. Remove drive plate-to-converter bolts.
- Remove crankshaft pulley and hub. Remove oil filter. Disconnect engine-to-transmission bracket. Disconnect right rear motor mount. Disconnect exhaust pipe at manifold and center hanger. Loosen muffler hanger.
- Disconnect TV/shift cable bracket. Remove 2 lower bellhousing bolts. Lower vehicle. Disconnect right front motor mount. Remove alternator and adjusting brace. Disconnect master cylinder and move aside. Attach engine lift.
- Remove right front motor mount bracket. Remove upper bellhousing bolts. Remove power steering pump while lifting engine. Remove engine.
To install, reverse removal procedure.
Removal (FWD Manual Transmission Models)
- Disconnect battery cables. Drain coolant system. Raise and support vehicle. Remove front engine mount-to-cradle nuts. Remove forward exhaust pipe. Remove starter motor with wiring attached and position aside.
- Remove flywheel inspection cover. Lower vehicle. Remove air cleaner. Remove all bellhousing-to-engine bolts.
- Remove forward torque reaction rod from engine and radiator core support. Remove A/C compressor and position aside with hoses attached (if equipped).
- Remove vacuum hoses at canister. Remove power steering hose (if equipped). Remove all vacuum hoses and electrical connectors at solenoid. Remove heater blower motor. Disconnect accelerator cable. Drain cooling system.
- Disconnect heater and radiator hoses. Disconnect engine wiring harness at bulkhead connector.
- Install engine lift and lift engine slightly. Remove heater hose and fuel line from intake manifold. Remove engine.
To install, reverse removal procedure.
Removal (FWD Automatic Transmission Models)
- Disconnect battery cables. Drain cooling system. Remove air cleaner and heat tube. Disconnect engine wiring harness connector. Disconnect all vacuum hoses. Remove throttle and transaxle linkage at EFI assembly and intake manifold.
- Remove upper radiator hose. Remove A/C compressor from brackets and position aside with hoses connected (if equipped). Remove front engine strut assembly. Disconnect heater hose at intake manifold. Remove transaxle-to-engine bolts, leaving top 2 bolts in place.
- Remove front mount-to-cradle nuts. Remove forward exhaust pipe. Remove flywheel cover and starter. Remove drive plate-to-converter bolts. Remove power steering pump with bracket and position aside. Remove remaining heater hose and lower radiator hose.
- Remove 2 rear transaxle support bracket bolts. Remove fuel line at fuel filter. With floor jack and block of wood under transaxle, raise engine until front mount studs clear cradle.
- Attach engine lift to engine and tension slightly. Remove 2 remaining transaxle-to-engine bolts. Remove engine.
To install, reverse removal procedure.
Removal (Beretta & Corsica)
- Disconnect battery cables. Remove air cleaner, inlet hose and mass airflow sensor. Drain cooling system. Remove exhaust manifold/crossover assembly. Remove serpentine belt tensioner and belt. Disconnect power steering pump and lay aside. Remove idler pulley (if equipped).
- Remove radiator hose at engine. Remove accelerator and T.V. cable at throttle valve bracket at plenum. Remove alternator and lay aside. Disconnect wiring harness, fuel hoses, coolant by-pass and overflow hoses at engine. Remove canister purge at canister. Remove all attaching vacuum hoses.
- Support engine with Engine Holding Fixture (J-28467). Raise and support vehicle. Remove right inner fender splash shield, harmonic dampener, and flywheel cover. Remove starter bolts, wires and starter. Remove wires at oil sending unit. Remove A/C compressor and brackets (if equipped).
- Remove exhaust pipe, flywheel-to-torque converter bolts, front and rear motor mount bolts and brackets. Remove intermediate shaft bracket-to-engine. Disconnect shift cable bracket at transaxle. Remove lower bellhousing bolts and lower vehicle.
- Remove heater hoses at engine. Install lifting devise. Remove holding fixture. Support transaxle with jack. Remove upper bellhousing bolts and front mount bolts. Remove transaxle mount bracket and engine.
To install, reverse removal procedure.
Removal (Camaro)
- Disconnect battery cables. Remove air cleaner. Mark hinges for reassembly and remove hood. Drain cooling system. Remove lower radiator hose. Remove upper fan shroud. Remove upper radiator hose and coolant recovery hose.
- Disconnect transmission cooler lines at radiator. Remove radiator. Remove fan assembly. Remove heater hoses.
- Disconnect throttle and cruise control detent linkages from carburetor. Disconnect all vacuum lines and wiring to engine. Remove distributor cap.
- Remove power steering pump and position aside with hoses connected. Raise and support vehicle. Remove exhaust pipes at manifolds. Remove converter cover. Remove drive plate-to-converter bolts. Disconnect starter wires.
- Remove transmission-to-engine bolts. Remove motor mount through bolts. Disconnect fuel lines at fuel pump.
- Lower vehicle. Remove bracket holding Air Injection (AIR)-to-converter pipes. Support transmission with jack. Install engine lift. Remove engine, disconnecting wire from bracket at left rear of engine.
To install, reverse removal procedure.
Removal (Cavalier)
- Disconnect battery ground cable. Drain cooling system. Remove air cleaner. Remove mass airflow sensor. Remove exhaust crossover heat shield. Remove exhaust crossover pipe.
- Remove serpentine belt and tensioner. Remove power steering pump mounting bracket. Disconnect heater pipe at power steering pump mounting bracket. Disconnect radiator hose at engine. Disconnect accelerator and TV cable at throttle valve.
- Remove alternator. Disconnect wiring harness at engine. Disconnect fuel lines. Disconnect coolant by-pass and overflow hoses at engine. Disconnect canister purge hose at canister. Remove vacuum hoses. Raise and support vehicle.
- Remove right inner fender splash shield. Remove harmonic balancer. Remove flywheel cover. Remove wires at starter and remove starter. Disconnect wires at oil sending unit.
- Remove A/C compressor and bracket. Disconnect exhaust pipe at rear of manifold. Remove drive plate torque bolts at converter. Remove the transaxle-to-engine brace bolts. Remove the engine rear mount-to-frame nuts.
- Disconnect shift cable bracket at transaxle. Remove lower bellhousing bolts. Lower vehicle. Disconnect heater hoses at engine. Install engine lift. Support transaxle with jack.
- Remove upper bellhousing bolts and front mount bolts. Remove master cylinder. Remove engine.
To install, reverse removal procedure.
Removal (Celebrity)
- Disconnect battery cables. Remove air cleaner. Drain cooling system. Remove engine strut bracket from radiator support and swing rearward. Remove Air Injection Reaction (AIR) pump and bracket.
- Remove A/C compressor from bracket and set aside (if equipped). Disconnect vacuum hoses from all non-engine mounted components. Disconnect accelerator cable and detent cable (if equipped). Disconnect engine harness from Electronic Control Module (ECM) and pull connector through front of dash.
- Disconnect radiator and heater hoses from engine. Remove power steering pump and bracket from engine (if equipped).
- Disconnect fuel lines at rubber hose connections at left side of engine compartment. Raise and support vehicle.
- Remove engine front mount-to-cradle and mount-to-engine bracket retaining nuts at right side of vehicle. Disconnect battery cables from engine at starter and transaxle housing bolt.
- Remove starter. Remove transaxle cover plate and drive plate-to-converter bolts. Remove crankshaft lower pulley and all belts. Disconnect exhaust pipe.
- Remove one lower transaxle-to-engine bolt from rear of engine. Disconnect power steering cut-off switch (if equipped).
- Lower vehicle. Remove exhaust crossover pipe. Remove remaining transaxle-to-engine bolts. Make note of ground stud location. Place support under transaxle rear extension. Install engine lift and remove engine.
To install, reverse removal procedure.
- Mark hinges for reinstallation and remove hood. Disconnect battery cables. Drain cooling system. Raise and support vehicle.
- Disconnect exhaust at manifold. Remove flywheel cover. Disconnect transmission oil cooler lines at oil pan. Remove left motor mount through bolt and right bolt.
- Remove flywheel-to-torque converter bolts. Remove bell housing bolts. Disconnect Computer Command Control (CCC) harness at transmission. Disconnect knock sensor.
- Disconnect fuel hoses at frame. Remove lower fan shroud. On Monte Carlo, disconnect starter wires and remove starter. Lower vehicle.
- On all models, disconnect Electronic Control Module (ECM) harness at engine. Disconnect necessary wires and vacuum hoses. Remove upper fan shroud. Remove accelerator and TV cables. Disconnect heater hoses. Disconnect radiator hoses. Remove A/C compressor and lay aside.
- Remove power steering pump and lay aside. Disconnect transmission cooler lines at radiator. On Caprice, remove radiator, disconnect overflow tube and A/C hose at alternator. Remove alternator adjusting brace.
- Disconnect heater hose at bracket on intake manifold. Disconnect ground strap at rear of cylinder head. On Monte Carlo, remove fan and pulley, and disconnect ground straps at both cylinder heads.
- On all models, disconnect battery cables at frame. Disconnect converter Air Injection Reaction (AIR) pipe at exhaust manifold. Disconnect AIR hose at converter AIR pipe. Support transmission with jack and remove engine.
To install, reverse removal procedure.
Removal (Except Corvette)
- Disconnect battery and remove air cleaner. Drain radiator. Disconnect radiator hoses and remove upper fan shroud. Remove fan assembly. Disconnect heater hoses at engine.
- Remove power steering pump and lay aside. Remove A/C compressor and lay aside. Disconnect accelerator and TV cable. Disconnect cooler lines at radiator. Remove radiator.
- Disconnect vacuum hoses. Disconnect Computer Command Control (CCC) wiring harness. Disconnect Air Injection Reaction (AIR) hose at pipe from converter. Remove washer bottle. Disconnect engine wiring harness at bulkhead. Disconnect necessary wires. Remove hood.
- Remove distributor cap. Disconnect cruise control cable. Disconnect battery positive cable to battery and frame. Disconnect battery negative cable at A/C hose bracket and alternator bracket. Raise and support vehicle.
- Remove crossover pipe and catalytic converter as an assembly. Remove flywheel cover. Remove torque converter bolts. Remove motor mount bolts. Disconnect fuel hose at fuel pump. Disconnect torque converter clutch wiring at transmission.
- Disconnect transmission cooler lines at clip on engine pan. Remove transmission-to-engine bolts. Lower vehicle. Support transmission. Install lifting device and remove engine.
To install, reverse removal procedure.
Removal (Corvette)
- Disconnect negative battery cable. Drain coolant. Remove air cleaner. Remove serpentine belt. Remove braces at back of A/C compressor. Disconnect wires at A/C compressor.
- Disconnect fuel lines. Remove A/C compressor mounting bracket nuts and bolts. Disconnect heater hoses. Disconnect fuel line clip at fuel pump cover plate. Disconnect upper radiator hose at thermostat outlet.
- Remove A/C compressor-to-mounting bracket bolt and move compressor aside. Remove mounting bracket. Disconnect Port Fuel Injection (PFI) harness at engine. Disconnect cruise, detent and accelerator cables.
- Remove distributor shield and cap. Disconnect detent cable bracket at intake. Remove distributor. Disconnect wires at oil pressure sending unit. Remove oil pressure sending unit. Disconnect vacuum hoses.
- Disconnect power steering hoses at rack and pinion. Remove crankshaft pulley. Disconnect bulkhead connector and necessary connectors. Disconnect AIR hose at converter check valve. Move fuel lines out of way.
- Disconnect radiator hose at water pump. Disconnect upper radiator hose at power steering reservoir bracket. Raise and support vehicle. Disconnect Air Injection Reaction (AIR) pipe at exhaust manifold. Remove AIR converter pipe.
- Disconnect "Y" pipe hanger. Disconnect heat shields at "Y" pipe and converter. Disconnect oxygen sensor wire. Remove "Y" pipe. Remove flywheel cover. Remove torque converter bolts. Loosen motor mount through bolts.
- Remove motor mount-to-engine block bolts. Remove bellhousing bolts and lower vehicle. Disconnect knock sensor wire. Disconnect ground cable at engine. Disconnect positive battery cable at battery and harness.
- Remove right rear intake manifold bolt and install lift hook. Support transmission with floor jack. Install engine lift. Remove engine, disconnecting wire from bracket at left rear of engine.
To install, reverse removal procedure.
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| 1.6L (98") | ||
| Drive Plate-to-Converter Bolts | 20 (27) | |
| Engine Mount Nuts | 48 (65) | |
| Transmission-to-Engine Bolts | 47 (64) | |
| 2.0L (122") | ||
| Drive Plate-to-Converter Bolts | 31 (42) | |
| Front Motor Mount-to-Engine Bolts | 25-35 (34-47) | |
| Lower Motor Mount-to-Engine Bolts | 15-20 (20-27) | |
| Motor Mount-to-Frame Bolts | 35-45 (47-61) | |
| Starter-to-Engine Bolts | 26-37 (35-50) | |
| Transaxle-to-Engine Bolts | 48-63 (65-85) | |
| 2.5L (151") | ||
| Drive Plate-to-Converter Bolts | 30 (41) | |
| Motor Mount-to-Engine Bolts | 35 (47) | |
| Motor Mount-to-Frame Bolts | 35 (47) | |
| Starter-to-Engine Bolts | 32 (43) | |
| Transmission-to-Engine Bolts | 48-63 (65-85) | |
TORQUE SPECIFICATIONS (4-CYLINDER)
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| 2.8L (173") | ||
| Drive Plate-to-Converter Bolts | 25-35 (34-47) | |
| Motor Mount-to-Engine Bolts | 35 (47) | |
| Motor Strut Through Bolts | 35 (47) | |
| Starter-to-Engine Bolts | 32 (43) | |
| Transmission-to-Engine Bolts | 48-63 (65-85) | |
| 4.3L (262") | ||
| Drive Plate-to-Converter Bolts | 35 (47) | |
| Motor Mount-to-Engine Bolts | 59 (80) | |
| Motor Mount-to-Frame Bolts | 33 (45) | |
| Motor Mount Through Bolts | 47 (64) | |
| Starter-to-Engine Bolts | 35 (47) | |
| Transmission-to-Engine Bolts | 35 (47) | |
TORQUE SPECIFICATIONS (V6)
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| 5.0L (305") | ||
| Drive Plate-to-Converter Bolts | 35 (47) | |
| Motor Mount-to-Engine Bolts | 75 (102) | |
| Motor Mount-to-Frame Bolts | 35 (47) | |
| Motor Mount Through Bolts | 55 (75) | |
| Starter-to-Engine Bolts | 30 (41) | |
| Transmission-to-Engine Bolts | 35 (47) | |
| 5.7L (350") | ||
| Crankshaft Pulley Bolts | 26-37 (35-50) | |
| Drive Plate-to-Converter Bolts | 35 (47) | |
| Intake Bolts | 35 (47) | |
| Motor Mount-to-Engine Bolts | 33-49 (45-66) | |
| Motor Mount Through Bolts | 70-85 (95-115) | |
| Transmission-to-Engine Bolts | 30 (41) | |
TORQUE SPECIFICATIONS (V8)