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1963 Corvette: Service Bulletin: Spare Tire Lock Corrosion

Estimated Reading Time: 1 Minutes

Subject: Spare Tire Lock Corrosion
Model and Year: 1963 Corvettes
Source: Chevrolet Technical Service Bulletin
Number: DR #610, Section X
Date: July 22, 1963


Spare tire lock jamming or difficult operation may be due to an accumulation of dirt or salt deposits in the lock cylinder.  The exposed location of the spare tire lock makes it susceptible to corrosion and subsequent malfunction.

To prevent or correct field complaints concerning this problem, the lock should be checked when the vehicle is in for service and if defective, cleaned, and a protective boot installed as shown on Page 2 of this bulletin.

Beginning with March 15, 1963 production, the protective boot Part No. 3841701 will be installed to prevent corroding of the lock.


  1. Remove lock assembly from vehicle
  2. Remove rubber insulator from lock body and discard.
  3. Remove lock cylinder by inserting a small tool or paper clip into the recess to the right of the key plate, pushing down on spring loaded plunger and turning the cylinder.
  4. Clean the lock cylinder of all scale and corrosion.
  5. Reassemble lock cylinder to lock body and lubricate with Part No. 986434 Lockease.
  6. Install lock assembly on vehicle with Part No. 3841701 Boot to prevent further dirt entry and corrosion.

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1963 Corvette: Service Bulletin: Spare Tire Lock Corrosion
  1. This is a very useful sketch; my valve is open all of the time, even when the a/c is trying to work.

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