Cylinder Head - Revised Replacement
Number: 93-54-6ASection: 6A
Date: NOV. 1992
Corporate Bulletin No.: 236116
ASE No: A1, A8
Subject:
CYLINDER HEAD REPLACEMENT
Model and Year:
1990-93 GEO STORM
SERVICE UPDATE
Application:
1990-91 Geo Storm models equipped with 1.6L engine VIN 5 (RPO LWO).
1992-93 Geo Storm models equipped with 1.8L engine VIN 8 (RPO LV6)
This bulletin is an addition to the procedures located under "Cylinder Head" found in Section 6A2 of the 1990-91 Geo Storm Service Manual (ST371-90 and ST271-91, respectively) and "Cylinder Head and Valve Off-Vehicle Service" found in Section 6A2 of the 1992-93 Geo Storm Service Manuals (ST371-92 and ST371-93, respectively).
When replacing the cylinder head, the oil flow check valve and the cylinder head oil control valve must be transferred to the new cylinder head (Figure 1). These two valves are located beneath the intake camshaft between the number 3 and number 4 cylinder bores. Both valves are threaded into the cylinder head.