Cleaning Procedure

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Main Bearing Caps

Courtesy of GENERAL MOTORS COMPANY

CAUTION:

Do not use a caustic solution to clean the aluminum engine block.

NOTE:

When cleaning the engine block in a thermal type oven, do not exceed 232°C (450°F).

Clean the following components:

Remove all sludge, dirt, or debris using a cleaning solvent or thermal type oven. Refer to Cleanliness and Care .
Gasket surfaces
Refer to Replacing Engine Gaskets .
Coolant passages
Oil galleries
Main bearing caps
Cylinder head bolt holes to remove threadlocking material
Thread repair tool J-42385-107 may be used to clean the threads of any residual threadlocking material.