1 Manufacturer s identity number assigned to all Chevrolet built vehicles 2 See Model Identification in this section 3 Last number of model year 1985 4 W Willow Run 5 Unit numbering will start at 100 001 at all plants SELECTION OF GASOLINE The Corvair Turbo Air six cylinder engine is designed to deliver peak performance on what is designated as regular grade gasoline in the United States and Canada The Corsa model and all Corvair models equipped with the Turbo Air 110 H P engine are designed to operate most efficiently on Premium gasoline Regular gasoline may vary in octane between manufacturers or between different sections of the country If unfavorable performance is encountered because of either or both of these factors dealer adjustment of ignition timing will restore the vehicle to normal operation KEYS AND LOCKS Two keys are provided with each Corvair The octagonal end key operates the ignition switch and front door locks The round end key operates the locks for the glove box and front compartment lid Lock cylinders are furnished for service uncoded this necessitates the coding of all replacement lock cylinders TUMBLERS It o O ItSDRING RETAINER Fig 10 Side Bar Lock The side bar type lock fig 10 is used for the ignition door and front compartment on passenger cars Glove compartment locks are wafer tumbler single bitted type having 4 tumblers on passenger cars To protect owners automobile lock manufacturers stamp the lock number on the lock core shaft etc where they will not show until the lock is removed To obtain the code number remove the door lock The key number may be obtained from the lock core shaft etc which will be the same on all of the other locks In addition when a lock cylinder requires replacement the lock code number may be obtained either from the key if available or from the old lock cylinder which is being replaced Once the code number of the lock is obtained look up this number in a key cutting book There are two types of code booklets in general use one which lists the cutting code by letters C N B and Y Numbers or letters are always recorded from the head of the key to the end Numbers may be transposed to letters to numbers as follows Code Book Numbers Code Book Letters 1 C N 3 g 4 Y All side bar locks furnished to the field by the Parts Department are uncoded that is they are furnished without tumblers springs or spring retainers These parts are serviced separately The tumblers come in four different depths indicated by colors C for copper IN for nickel 111311 for black and Y for yellow The side bar locks have six tumbler positions and in looking up the cutting code the following may be used as an example After key code number is determined either from key or from number stamped on lock cylinder refer to your code book and record the key cutting information as follows Key of Key cutting Key cutting lock code code code Number Numerical Alphabetical 8109 2 3 Z 1 2 4 N B N C N Y Cutting or Tumbler 1 2 3 4 5 6 1 2 3 4 5 6 position from head of lock The numbers or letters depending on code book which are written above the cutting or tumbler position indicate the different color tumblers which are to be dropped into each tumbler slot of the lock C copper IN nickel 11B black Y yellow NOTE If code book used lists the key cutting code numerically the numbers must be transposed to letters as previously stated in order to select proper color tumblers for installation into the lock YSNC 654 321 Fig 11 Tumbler Requirement Diagram In cases where a code book is not available the diagram as shown in Figure 11 may be used to determine the tumblers required to assemble an uncoded lock cylinder 1 Lay the key on the diagram fig 11 with the bottom of the key flush with the edge of the drawing head and point carefully lined up 2 Read the code in letters C N B Y from the head of key to the end from positions 1 to 6 inclusive As