Removal & Installation: Camshaft: Inspection
WARNING: This page is about a different car, the 1988 Chevrolet Sprint. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect rocker arms and shaft for wear. Determine rocker arm-to-shaft clearance. Rocker arm I.D. should measure .630-.631" (16.00-16.09 mm). Rocker shaft diameter is .629-.630" (15.97-15.99 mm).
- Standard clearance is .0005-.0018" (.012-.045 mm). Maximum clearance is .004" (.09 mm). If specifications are exceeded, replace rocker shaft or arm. Mount rocker shaft in "V" blocks. Measure rocker shaft runout using a dial indicator. Maximum runout is .005" (.12 mm). Replace shaft if specifications are exceeded.
- Measure cam lobe height using a micrometer. Refer to the CAMSHAFT table in this article. If height is less than specifications, replace camshaft. Mount camshaft in "V" blocks and measure runout. Maximum runout is .0039" (.10 mm).
- Inspect camshaft journals for wear and damage. Measure journal shaft diameter and journal bore diameter to determine journal clearance. See Fig 1. Journal clearance should measure .002-.0036" (.05-.09 mm). If journal clearance exceeds .006" (.15 mm), replace camshaft and/or cylinder head.