Model Year: 1984-89 YB Witih 5.7L Engine
Subject: Camshaft Lobe Lift Specifications
Source: Chevrolet Dealer Service Update Bulletin
Number: 89-197-6A, Section 6A
Date: June 1989
TO: ALL CHEVROLET DEALERS
The following specifications supersede information previously published in the 1984-89 Corvette Service Manuals, Section 6A1, "General Engine Mechanical."
| Model Year | Intake mm (in.) | Exhaust mm (in.) |
|---|---|---|
| 1984 | 6.833 (0.26902) | 7.021 (0.27642) |
| 1985 | 6.833 (0.26902) | 7.021 (0.27642) |
| 1986 | 6.833 (0.26902) | 7.021 (0.27642) |
| 1987 | 6.833 (0.26902) | 7.021 (0.27642) |
| 1988 | 7.021 (0.27642) | 7.281 (0.28666) |
| 1989 | 7.021 (0.27642) | 7.281 (0.28666) |
Article ID: 547
Created: July 28, 2014
Last Updated: July 28, 2014
Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article/1984-1989-corvette-service-bulletin-camshaft-lobe-lift-specifications-547.html