Engine - Failure Due to Broken Valve Spring Caps
88buick09Bulletin: 88-6-20
Date: July, '88
Ref. No.: 88-138-6
Corp. Ref. No.: 806104R
SUBJECT: ENGINE FAILURE DUE TO BROKEN VALVE SPRING CAPS
MODELS AFFECTED: SOME 1988 LESABRES, ELECTRAS, AND RIVIERAS EQUIPPED WITH 3800 (VIN CODE C) V6 ENGINES
FIGURE 1:
Beginning January 25, 1988, increased strength valve spring caps were released into production for the 3800 engine. All 3800 engines built after the following breakpoints were assembled with the new valve spring caps. Refer to Figure 1.
Engine Code Beginning Breakpoint
(Engine Build Sequence)
FBA 0305856
FCA 0326238
FDA 0330374
If broken valve spring caps are encountered on an engine assembled prior to the breakpoints, replace all valve spring caps with Part Number 25534605 (12 per engine), available from GMSPO.