Fix It

Raise the front of your Blazer with a jack and position a set of jack stands under the front suspension to support the truck while you work under it. Lower the jack and remove it from under the truck.

Position yourself under the passengers side of the Blazer and locate the catalytic converter in the exhaust system. Find the O2 sensor on the drivers side of the case and follow the wires from the top of the sensor to the wiring harness connector.

Release the locking tab on the wiring harness connection, then separate the two halves of the connector. Place an O2 sensor socket on the sensor body and turn it counterclockwise with a ratchet. Remove the sensor and set it aside for reuse later.

Move to the rear of the converter and remove the bolts from the mounting flange with a socket and ratchet. Pull the exhaust pipe loose from the converter and push it off to one side.

Locate the flange at the front of the catalytic converter. Remove the mounting bolts with a socket and ratchet, then separate the converter from the exhaust pipe.

Locate the rubber isolator that supports the converter; slide it off the mounting pin on the frame, then lower the converter down and out of the exhaust system. Slide the catalytic converter out from under the truck.

Remove the A/C compressor belt by loosening the pivot and locking belt on the belt idler pulley until the belt is loose. Flip the A/C compressor belt up over the lip of the pulley, and remove it.

Loosen the pivot nut and locking nut of the alternator/water pump belt. Turn the alternator adjusting bolt counter-clockwise to loosen the belt, and remove it from the pulley.

Loosen the locking nut and pivot bolt of the power steering pump belt. Turn the adjustment nut counter-clockwise, and remove the belt. Loosen the nuts and bolt of the air pump belt, and remove its cover. Remove the locking bolt and pivot bolt, and pull the air pump until it is out of the way.

Remove the nuts on the valve cover studs of the engine and the 10 mm bolts on the underside of the engine mount. Pull off upper belt cover.

Place a car jack underneath the right (passengers) side of the car. Jack up the car, and lock the car jack. Using a socket wrench, take off the bolts that secure the right front wheel, and lift the wheel off its mount.

Detach the plastic wheel well shroud at the back of the wheel well. Using a socket wrench, remove the four or five bolts that secure the main crankshaft pulley onto the engine. Do not remove the center bolt.

Remove the 10 mm bolts holding the lower belt cover on, and pull the cover off. Place a car jack under the drivers side front. Jack up the car to take the weight off the right side of the car.

Remove the nut and bolt of the center mount and the large nut directly underneath it. Unscrew the two bolts that attach the engine mount to the frame of the car. Lift off the outer half of the engine mount, and set it aside.

Loosen the timing belt idler pulley bolt, and rotate the pulley 180 degrees with a large wrench. Remove the bolt that secures the camshaft sprocket at the center of the pulley onto the engine. Slide the camshaft sprocket off the camshaft.