Chevrolet Blazer, GMC Jimmy 2WD and 4WD Repair Manual 1969-1982

DISTRIBUTOR | REMOVAL AND INSTALLATION
1969-1974 Models
(See Figures 1, 2 and 3)

1. Remove the distributor cap and position it out of the way.



2. Disconnect the primary coil wire (the thin wire) and the vacuum advance line(s).



3. Scribe a mark on the distributor body and the engine block showing their relationship. Mark the distributor housing to show the direction in which the rotor is pointing. Note the positioning of the vacuum advance unit.



4. Remove the distributor hold-down bolt.



5. Slowly pull the distributor up. The rotor will turn a little bit as it is removed. Carefully note the position of the rotor when it stops turning. This is the position that the distributor must be in when the distributor is installed.



6. To install the distributor with the engine undisturbed:

1. Carefully insert the distributor into the block with the rotor positioned as outlined in the previous step. The rotor will turn slightly as the distributor is inserted and return to its original position.



2. Install the retaining clamp and bolt. Install the distributor cap, primary wire, and the vacuum hose(s).



3. Start the engine and check the ignition timing.

SHOCK ABSORBERS | TESTING

The usual procedure for testing shock absorbers is to stand on the bumper at the end nearest the shock being tested and start the vehicle bouncing up and down. Step off: the vehicle should come to rest within one bounce cycle.

Another good test is to drive the vehicle over a bumpy road. Bouncing over bumps is normal, but the shock absorbers should stop the bouncing, after the bump is passed, within one or two cycles.

REMOVAL AND INSTALLATION
(See Figures 5 and 6)

The usual procedure is to replace shock absorbers in axle pairs, to provide equal damping. Heavy duty replacements are available for firmer control.

1. Raise and support the front axle as necessary.



2. Remove the bolt and nut from the lower shock end.



3. On two wheel drive original equipment shocks, remove the upper stud nut from inside the frame. Most aftermarket replacement two wheel drive shocks replace the original stud fixed to the top of the shock with a double ended stud; if you have these, you can just remove the outer nut. On four wheel drive shocks, remove the upper bolt and nut.



4. Purge the new shock of air by extending it in its normal position and compressing it while inverted. Do this several times. It is normal for there to be more resistance to extension than to compression.

• Tune-up and routine maintenance
• 250 ci inline 6-cylinder engine
• 305, 307, 350 (2, 4 bbl) and 400 ci V8 engine
• Engine and overhaul procedures
• Cooling, heating and air-conditioning systems
• Fuel and exhaust systems
• Engine electrical systems
• Emissions control systems
• Manual transmission
• Clutch
• Automatic transmission
• Transfer case
• Driveline
• Brakes
• Suspension and steering systems
• Body and interior
• Chassis electrical system
• Wiring diagrams