SMU - SECTION 6A2B - ENGINE MECHANICAL. Chevrolet Corvette 1990

SUBJECT: SERVICE MANUAL UPDATE - SECTION 6A2B - ENGINE MECHANICAL - EXHAUST VALVE GUIDE SEAL REPLACE

MODELS: 1990 CHEVROLET CORVETTE ZR1 WITH 5.7L ENGINE (VIN J - RPO LT5)

WHEN REFERRING TO FIGURE 38 ON PAGE 6A2B-34 OF THE LT5 CORVETTE SERVICE MANUAL SUPPLEMENT, ITEM 6 APPLIES TO 1991-95 ENGINES ONLY. THERE ARE NO EXHAUST VALVE GUIDE SEALS ON 1990 APPLICATIONS.

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GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.