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Chevrolet Silverado / GMC Sierra. Manual - part 2155
Fig. 141: Applying Threadlock To Insert
Courtesy of GENERAL MOTORS CORP.
11. Apply threadlock LOCTITE™ 277, J 42385-109 (1), or equivalent, to the insert OD
threads (2).
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Fig. 142: Installing Insert Into Tapped Bolt Hole
Courtesy of GENERAL MOTORS CORP.
12. Install the insert (2) into the hole.
Install the insert until the flange of the insert contacts the counterbored surface. Continue to
rotate the installer tool (1) through the insert.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
The installer tool will tighten up before screwing completely through the insert. This is
acceptable. You are forming the bottom threads of the insert and mechanically locking the
insert to the base material threads.
Fig. 143: View Of Bushing Type Insert & Base Material
Courtesy of GENERAL MOTORS CORP.
13. Inspect the insert for proper installation into the hole.
A properly installed insert (1) will be either flush or slightly below flush with the surface of
the base material (2).
Cylinder Head Bolt Hole Thread Repair
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
