K 2500 Yukon 4WD V8-6.0L VIN U (2000)
Engine Mount: Service and Repair
Engine Mount Inspection
Notice: 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.
Notice: 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.
1. Raise and support the engine with a screw jack.
2. Raise the engine in order to complete the following tasks:
2.1.
Remove the weight from the mount.
2.2.
Place a slight tension on the rubber cushion.
2.3.
Observe the mount while raising the engine.
3. Replace the mount if the following conditions exist:
^
Heat check cracks on the hard rubber surface
^
The rubber cushion is separated from the metal plate of the mount.
^
There is a split through the rubber cushion
4. If the mount is loose, lower the engine and tighten the bolts or the nuts to the engine frame or the bracket.
5. Push up and pull down on the transmission extension housing. Observe the transmission mount.
6. Replace the mounting if the following conditions exist:
^
The rubber cushion is separated from the metal plate of the mounting.
^
The mounting has bottomed out.
^
The extension housing moves up but not down.
7. If a mount is loose, tighten the bolts or the nuts. Refer to Fastener Tightening Specifications in Specifications.
