Oil Pan Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.

IMPORTANT:

Do not use the oil pan cover gasket again. Install a NEW cover gasket during assembly.
Do not use the oil pan to engine block gasket again. Install a NEW gasket during assembly.
When installing a NEW oil pan gasket, it is not necessary to install the rivets that retain the NEW gasket to the pan.

Fig 1: View Of Oil Level Sensor

Courtesy of GENERAL MOTORS CORP.

Fig 2: View Of Oil Pan Cover, Gasket & Bolts

Courtesy of GENERAL MOTORS CORP.

Fig 3: View Of Oil Pan Drain Plug

Courtesy of GENERAL MOTORS CORP.

Fig 4: View Of Oil Pan Baffle & Bolts

Courtesy of GENERAL MOTORS CORP.

Clean the oil pan in solvent. Be sure to thoroughly clean all of the oil passages and recesses of the pan.
Clean the oil pan gasket surfaces. Refer to Replacing Engine Gaskets .

CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.

Dry the oil pan with compressed air.
Inspect the gasket sealing surfaces for excessive scratches or gouging. Refer to Replacing Engine Gaskets .
Inspect the oil level sensor seal surface and threads for damage.

Fig 5: View Of Oil Level Sensor

Courtesy of GENERAL MOTORS CORP.

Inspect the oil pan drain plug and threaded drain hole for damaged threads.
The drain plug O-ring seal may be used again if not cut or damaged.

Fig 6: View Of Oil Pan Drain Plug

Courtesy of GENERAL MOTORS CORP.

Inspect the oil filter sealing surface for scratches or gouging.
Inspect the oil filter fitting (438) for a loose fit or damaged threads.
Inspect the oil passages for restrictions.
Inspect the oil filter bypass valve (436) for proper operation.
Lightly depress the bypass valve. The valve spring should seat the valve to the proper position.

Fig 7: View Of Oil Filter Fitting & Bypass Valve

Courtesy of GENERAL MOTORS CORP.