LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 722 (Engine Mechanical - 8.1L (Unit Repair)) >> Repair Instructions >> Valve Guide Reaming/Valve and Seat Grinding >> Valve Guide Reaming Procedure for Oversized Valve Stems

Valve Guide Reaming Procedure for Oversized Valve Stems

WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The exhaust valve guides are replaceable components and must be serviced properly. The exhaust valve guide must be pressed out and into the cylinder head in the proper directions. The old exhaust valve guide must be removed by pressing out towards the combustion chamber side of the cylinder head. The new exhaust valve guide must be installed by pressing from the combustion chamber side of the cylinder head. Failure to press the exhaust valve guide out and into the cylinder head in the proper directions will damage the cylinder head.
  1. Ream the valve guide as necessary to achieve proper valve stem-to-guide clearance with the new, oversized valve stems.
  2. Always recondition the valve seat after reaming the valve guide bores or installing new valves.
  3. Replace the cylinder head if the valve guide cannot be repaired or reamed to accept an oversize valve stem.
    Fig 1: Reaming Valve Guide
    G01675486Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals