Oil Pan Installation

WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Oil Baffle & Bolts

Courtesy of GENERAL MOTORS CORP.

IMPORTANT:

The alignment of the structural oil pan is critical. The rear bolt hole locations of the oil pan provide mounting points for the transmission housing. To ensure the rigidity of the powertrain and correct transmission alignment, it is important that the rear of the block and the rear of the oil pan are flush, or even. The rear of the oil pan must NEVER protrude beyond the engine block and transmission housing plane.
Do not use the oil pan gasket again.
It is not necessary to rivet the NEW gasket to the oil pan.
It is not necessary to remove the oil level sensor prior to oil pan installation.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the oil pan baffle and bolts.
Tighten: Tighten the oil pan baffle bolts to 12 N.m (106 lb in).

Fig 2: View Of Oil Gallery Plugs

Courtesy of GENERAL MOTORS CORP.

Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads of the oil pan oil gallery plugs.
Install the oil gallery plugs.
Tighten: Tighten the oil gallery plugs to 25 N.m (18 lb ft).

Fig 3: View Of Oil Transfer Tube, Bolts & Gaskets

Courtesy of GENERAL MOTORS CORP.

Install the oil transfer tube (447), gaskets (445, 448) and bolts (435, 446).
Tighten: Tighten the oil transfer tube bolts to 12 N.m (106 lb in).

Fig 4: View Of Sealant On Engine Front Cover Gasket Tabs

Courtesy of GENERAL MOTORS CORP.

Apply a 5 mm (0.2 in) bead of sealant GM P/N 12378190 or equivalent 20 mm (0.8 in) long to the engine block. Apply the sealant directly onto the tabs of the front cover gasket that protrude into the oil pan surface. Refer to Sealers, Adhesives, and Lubricants .

Fig 5: View Of Sealant On Engine Rear Cover Gasket Tabs

Courtesy of GENERAL MOTORS CORP.

Apply a 5 mm (0.2 in) bead of sealant GM P/N 12378190 or equivalent 20 mm (0.8 in) long to the engine block. Apply the sealant directly onto the tabs of the rear cover gasket that protrude into the oil pan surface.

Fig 6: View Of Oil Pan & Bolts

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Ensure the oil gallery passages in the oil pan and engine block properly align with the oil pan gasket.

Pre-assemble the oil pan gasket to the pan.
1. Install the gasket onto the oil pan.
2. Install the oil pan bolts to the pan and through the gasket.
Install the oil pan, gasket and bolts to the engine block.
Tighten bolts finger tight. Do not overtighten.
Place a straight edge across the rear of the engine block and the rear of the oil pan at the transmission housing mounting surfaces.

Fig 7: Aligning Oil Pan To Rear Of Engine Block

Courtesy of GENERAL MOTORS CORP.

Align the oil pan until the rear of engine block and rear of oil pan are flush or even.
Tighten:
1. Tighten the oil pan-to-block and oil pan-to-front cover bolts to 25 N.m (18 lb ft).
2. Tighten the oil pan-to-rear cover bolts to 12 N.m (106 lb in).
Measure the oil pan-to-engine block alignment.
1. Place a straight edge across the rear of the engine block and rear of oil pan at the transmission housing mounting surfaces.
2. Insert a feeler gage between the straight edge and the oil pan transmission housing mounting surface, and inspect to ensure there is no more than a 0.25 mm (0.01 in) gap (a) between the pan and straight edge.
3. If the oil pan alignment is not within specifications, remove the oil pan and repeat the above procedure.