Engine Oil Pan Removal Chevrolet Chevy Van G20

TROUBLE SHOOTING

Note. See TROUBLE SHOOTING - BASIC PROCEDURES article in the GENERAL TROUBLE SHOOTING section.

FUEL PRESSURE RELEASE

4-Cylinder

Place transmission gear selector in PARK (NEUTRAL on manual transmissions). Set parking brake and block drive wheels. Loosen fuel filler cap to relieve tank pressure. Disconnect 3-terminal electrical connector at fuel tank. Start engine and allow to run until engine stalls. Crank engine for 3 seconds to remove any remaining fuel pressure.

V6 & V8

Place transmission gear selector in PARK (NEUTRAL on manual transmissions). Set parking brake and block drive wheels. Although fuel pressure drops to zero when ignition is turned off, loosen fuel filler cap to relieve tank pressure. To further minimize risk of fire and personal injury, cover surrounding areas with a shop rag while removing fuel lines.

Note. To remove oil pan, engine must be lifted or removed from engine compartment.

Removal (2WD)

1. Disconnect negative battery cable. Drain engine oil and cooling system. Remove engine (On all but "M" Series). Remove oil pan attaching hardware. Remove oil pan. Clean all gasket mating surfaces and straighten sealing flange.
2. When installing, apply thin coat of RTV sealer to entire oil pan sealing flange. Align holes of gasket on block and install oil pan.

Removal (4WD)

1. Disconnect negative battery cable and drain engine oil. Raise vehicle to remove drive belt splash, front axle and transfer case shields. Disconnect brake lines at crossmember. Remove No. 2 crossmember.
2. Disconnect exhaust pipes at manifold and slide rearward. On automatic transmission models, remove converter hanger bolts. Disconnect front drive shaft at drive pinion.
3. Disconnect engine braces at flywheel cover and loosen braces at block. Remove starter and flywheel cover. Disconnect steering damper at frame bracket. Remove steering gear bolts.
4. Mark position of idler arm location for reinstallation and remove attaching bolts. Pull steering gear and linkage forward. Remove front differential housing mounting bolts and move housing forward.
5. Remove motor mount through bolts. Remove oil pan retaining bolts. Raise engine. Remove oil pan. Clean all gasket mating surfaces and straighten sealing flange.

Inspection

Clean all parts in solvent. Remove all sludge and varnish. Clean gasket surfaces thoroughly. Inspect gasket flanges and reinforcement pieces for bending or damage. Inspect pan for cracks or rock damage. Check oil pan baffle fit. Inspect drain plug and pan threads for stripping.

Installation

To install, reverse removal procedure. Tighten bolts, nuts and studs to specification. See TORQUE SPECIFICATIONS table in this article.

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

Scheme 14

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

See also:
• TORQUE SPECIFICATIONS