The distributor in a 1997 Chevrolet Blazer accepts the electrical charge necessary for combustion and transmits it to the six spark plugs of the 4.3-liter Vortec V-6 engine in a specific order. A rotating rotor in the distributor head contacts the metal tips on the distributor cap sequentially, transferring the electrical signal to each spark plug through a spark plug wire.
Firing order 4.3 vortec
A poor or improperly installed distributor will alter the firing order causing the engine to sputter and can disable the engine completely. The Blazer distributor is not adjustable; however, the ignition timing must be correct for proper operation.
Step 1: vortec 4.3 firing order
Disconnect the negative battery cable from the battery terminal and position it so that you cannot accidentally touch the terminal during maintenance.
Step 2: vortec 4.3 firing order
Rotate the crankshaft damper at the front of the engine to the top dead center position for piston one. The crankshaft damper is attached to the large wheel at the front of the engine centered near the bottom. It has two alignment marks which, when aligned with the two V-cuts in the alignment bumps on the engine, identify top dead center.
Step 3: chevrolet 4.3 vortec firing order
Rotate the bottom of the distributor shaft until the rotor contact lines up with the alignment mark opposite the electrical input connector. There may be a 6 printed in place of an alignment mark. This prepares the distributor for use in the 6 cylinder engine.
Step 4: how to fit or distributor of blazer 4.3 v6
Look into the distributor hole with a flashlight. You will see the oil pump driveshaft. Attach it to the docking tab of the distributor with a flat-head screwdriver.
Step 5: 4.3 vortec engine firing order
Slide the distributor onto the engine. It should be fully seated with the spark plug wire outlets parallel to the firewall.
Step 6: order on vortec 4.3
Install the retaining bolt at the bottom of the manifold with a 10-millimeter manifold wrench. Tighten to 20 foot pounds.
Step 7: vortec 4.3 engine firing order
Place the distributor cap on top of the distributor and install the cap screws. Tighten them to 20 inch pounds with a Torx bit. Connect the electrical input connector to the manifold under the cap.
Step 8: chevrolet vortec 4.3 engine firing order
Connect the spark plug wires. If they were not tagged during removal, trace the motor cables. When looking at the engine compartment, the three wires from the left side of the engine connect to the left outlets on the distributor cap in order. From the right side of the engine, the front cable connects to the middle outlet, the middle cable to the front outlet, and the rear cable to the rear outlet.
Install the ignition coil wire to the front of the distributor cap. It looks like a spark plug wire, but it is not lined up like the spark plug wire outlets.
- Be careful of the accessory drive belt while rotating the crankshaft damper. It presents a pinch hazard to your hands and fingers.
- Do not allow dirt, grime, or tools to fall into the manifold hole before installing the manifold.
Items you will need
- 10 mm distribution wrench
- Ratchet set
- Socket set
- Torx Bit Set
- Foot-pound torque wrench
- flat head screwdriver
- Inch-pound torque wrench