Colorado 2WD V8-5.3L (2009)
Engine Mount: Testing and Inspection
Engine Mount Inspection
Caution: Broken or deteriorated mounts can cause misalignment and destruction of certain drive train components. When a single mount breaks, the
remaining mounts are subjected to abnormally high stresses.
Caution: When raising or supporting the engine for any reason, do not use a jack under the oil pan, any sheet metal, or the crankshaft pulley. Due to the
small clearance between the oil pan and the oil pump screen, jacking against the oil pan may cause the pan to be bent against the pump screen. This will
result in a damaged oil pickup unit.
Visual/Physical Inspection
1. Support the powertrain using the appropriate support method; refer to the powertrain mount replacement procedure. Raising the powertrain
removes the weight from the engine mount and creates slight tension in the rubber.
2. Clean the mount and surrounding area to ensure good visibility of the mount condition.
3. Verify all attaching fasteners are present and at the correct torque. Refer to Engine Mount Replacement - Left Side (See: Service and Repair)
and/or Engine Mount Replacement - Right Side (See: Service and Repair) for any torque sequencing and/or torque specifications.
Note: Observe the engine mount while raising the engine. If the engine mount exhibits any of the following conditions the mount may require
replacement. Refer to Engine Mount Replacement - Left Side (See: Service and Repair) and/or Engine Mount Replacement - Right Side (See:
Service and Repair).
4. Slightly raise the engine approximately 5-7 mm.
5. Inspect the mount for any of the following conditions:
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Hard rubber surfaces - covered with extreme heat check cracks.
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Rubber separation from the metal plate of the engine mount.
*
Rubber is split through the center of the engine mount.
Note: Before replacing any engine mount due to suspected fluid loss, verify that the source of the fluid is from the engine mount , and not the
engine or an external source.
*
If equipped with a hydraulic mount, inspect for GLYCOL(TM) fluid leaking from the engine mount.
