Cleaning Procedure
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
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.