Engine Oil Pan Removal Buick Estate Wagon

IDENTIFICATION

BODY IDENTIFICATION

TROUBLE SHOOTING

Note. To trouble shoot engine mechanical components, see appropriate table in TROUBLE SHOOTING article in GENERAL INFORMATION.

"J" Body

1. Disconnect negative battery cable. Raise and support vehicle. Remove right front wheel and front splash shield. Position jack stands at jack points.
2. Drain crankcase. Remove exhaust pipe from exhaust manifold or wastegate. Remove flexplate cover bolts. Remove bolts and oil pan.

"J" & "L" Bodies

1. Disconnect negative battery cable. Disconnect exhaust pipe shield and remove. Raise and support vehicle. Drain crankcase. Remove A/C brace at starter and at A/C bracket.
2. Remove starter bracket at block. Remove starter and lay aside. Remove flexplate cover and A/C brace. Remove right suspension support bolts to gain clearance to remove oil pan. Lower suspension support slightly to gain clearance for oil pan removal. Remove oil filler and extension on A/T models. Remove oil pan bolts and oil pan.

"L", "N" & "W" Bodies

Disconnect negative battery cable. Raise and support vehicle. Drain engine oil. Remove transaxle flexplate cover. Remove splash shield-to-suspension support bolt. Disconnect exhaust manifold brace (on M/T only). Remove radiator outlet pipe-to-oil pan bolt, transaxle-to-oil pan bolt and stud. Pry spacer from between oil pan and transaxle. Remove bolt connecting oil pan to transaxle. Remove oil pan and gasket. Rotate crankshaft to obtain clearance for removal (if necessary).

"A" & "W" Bodies

1. Disconnect negative battery cable. Remove coolant reservoir and engine torque strut. Remove drive belt, dipstick assembly, air cleaner and air inlet. Remove A/C compressor and wire out of way. Install Engine Support Fixture (J-28467-A).
2. Raise and support vehicle. Drain crankcase. Remove flexplate covers, starter and bracket. Remove engine wiring harness under right and left sides of oil pan. Remove right side engine splash shield.
3. Remove front engine mount bracket bolts and engine mount nuts. Remove transaxle mount nuts. Using engine support fixture, raise engine approximately 2". Remove front engine mount and bracket. Loosen frame bolts. Remove oil pan bolts and oil pan.

"N" Body

Disconnect negative battery cable. Raise and support vehicle. Drain crankcase. Disconnect exhaust pipe at manifold and hanger and wire out of way. Remove starter and flexplate access cover. Remove starter. Remove oil pan bolts and oil pan.

"A", "J", "L" & "W" Bodies

Disconnect negative battery cable. Raise and support vehicle. Drain crankcase. Remove flexplate access cover and starter. Support engine and remove engine mount bolts. Remove oil pan bolts. Raise engine and remove oil pan.

"F" Body

1. Disconnect negative battery cable. Remove air cleaner and distributor cap. Remove upper half of fan shroud. Raise vehicle and drain crankcase.
2. Remove flexplate access cover and starter. Disconnect exhaust pipe at manifold. Remove engine mount through bolts and raise engine. Remove oil pan bolts. Remove oil pan.

"A", "C", "E", "H" & "N" Bodies

Disconnect negative battery cable. Raise and support vehicle. Drain crankcase and remove oil filter. Remove flexplate access cover and crossover pipe (if equipped). Disconnect engine mounts. Raise and support engine. Remove oil pan bolts and oil pan.

"C", "E" & "K" Bodies

Disconnect negative battery cable. Raise vehicle and drain crankcase. Remove both flexplate access covers. Disconnect exhaust "Y" pipe at manifolds. Remove bolts from catalytic converter and lower exhaust. Remove oil pan bolts and oil pan.

"B" & "D" Bodies

1. Disconnect negative battery cable and remove air cleaner and fan shroud. Raise vehicle and drain crankcase. Remove cruise control servo bracket (if equipped).
2. Remove Air Injection Reaction (AIR) hose-to-catalytic converter pipe. Remove AIR pipe-to-exhaust manifold. Remove the exhaust crossover pipe at manifold and converter. Remove starter and flexplate access cover. Disconnect transmission line bracket at oil pan. Remove engine mount through bolts.
3. Remove oil pan bolts and lower pan. Position front crankshaft throw and/or counterweight on horizontal plane so it does not interfere with oil pan removal. Raise engine, reinstall through bolts and remove oil pan.

1. Disconnect negative battery cable. Remove air cleaner, fan shroud and distributor cap. Raise vehicle and drain crankcase. Disconnect exhaust pipe at manifold, Air Injection Reaction (AIR) pipe clamp and catalytic converter hanger bolts.
2. Remove front starter brace, starter and flexplate access cover. On models with M/T, it may be necessary to remove oil filter for access to flywheel cover bolts.
3. Remove engine mount through bolts and oil pan bolts. Raise engine and lower pan. Position front crankshaft throw and/or counterweights as to clear oil pan. Remove oil pan.

"Y" Body

1. Disconnect negative battery cable. Raise vehicle and drain crankcase. Remove oil filter. Remove oil filter adapter at block. On A/T models, remove flexplate cover. On M/T models, remove starter and bellhousing cover.
2. On all models, remove oil cooler pipe at oil pan. Remove Electronic Spark Control (ESC) shield. Remove front crossmember braces. Remove oil pan bolts. Remove oil pan.

4-CYLINDER

TORQUE SPECIFICATIONS (4-CYLINDER)

V6

TORQUE SPECIFICATIONS (V6)

V8

TORQUE SPECIFICATIONS (V8)