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Thursday, November 28, 2013

How Do I Change an Oxygen Sensor on a 1997 Hyundai Accent GL

The 1997 Hyundai Accent oxygen sensor threads into the exhaust manifold beneath the heat deflector under the car. The O2 sensor regulates the fuel consumption of the engine based upon the oxygen saturation of the exhaust. If the gas mileage in your car has inexplicably decreased substantially and the check engine light is on, you may have a failing O2 sensor. Buy a replacement sensor at an auto parts store or Hyundai dealership.

Instructions

Raise the Accent with a jack. Rest the car on a set of jack stands.

Disconnect the wiring harness from the O2 sensor just beneath the exhaust manifold heat deflector.

Remove the bolts on the outer edge of the heat deflector with a socket and ratchet. Set the heat deflector and bolts aside in a safe location. Remove the O2 sensor with an O2 sensor socket and ratchet.

Install the new sensor by hand to avoid cross threading it. Tighten the sensor with an oxygen sensor socket and ratchet. Reconnect the wiring harness on the O2 sensor by pressing it into place.

Replace the heat deflector. Secure the deflector with the bolts and tighten the bolts with a socket and ratchet.

Raise the car slightly with a jack and remove the jack stands. Lower the car to the ground.

Wednesday, September 25, 2013

How to Change a 2001 Hyundai Accent Timing Belt

The Hyundai Accent is a subcompact car that has been in production since 1994. The engine in this vehicle has an overhead camshaft, which generally requires a timing belt. The timing belt synchronizes the movements of the crankshaft and camshaft. The 2001 Hyundai Accent has a non-freewheeling engine, so you will typically need to replace the timing belt every 60,000 miles. This procedure requires you to remove additional components to access the timing belt.

Instructions

Disconnect the cable from the negative battery terminal with a socket wrench. Put a drain pan under the radiator and remove the drain plug, allowing the coolant to drain out. Disconnect the mounting bolts for the water pump pulley and push the pulley aside. Turn the belt tensioner to loosen the drive belt. Disconnect the crankshaft pulley and the cover for the timing belt.

Turn the crankshaft clockwise to move the No. 1 piston to the top dead center position. Loosen the bolts on the tensioner with a socket wrench and move the tensioner as close to the water pump as possible. Tighten the adjusting bolt for the tensioner to hold it in place. Remove the timing belt from its pulley. Disconnect the sprocket bolt for the crankshaft with a socket wrench. Detach the flange and sprocket from the crankshaft.

Install the sprocket and flange to the crankshaft. Torque the sprocket bolt to between 103 and 111 foot-pounds with a torque wrench. Align the timing marks on the crankshaft with those on the camshaft sprocket by turning the crankshaft clockwise.

Loosen the adjusting bolt on the belt tensioner and move the tensioner back to its normal position. Place the new timing belt over the sprocket of the crankshaft and slip the back of the belt onto the tensioner. Turn the sprocket of the camshaft clockwise to tighten the straight side of the belt.

Tighten the adjusting bolt for the tensioner to between 15 and 18 foot-pounds with a torque wrench. Then, torque the pivot bolt to between 15 and 18 foot-pounds. Turn the crankshaft clockwise one complete turn to seat the timing belt.

Loosen the attaching bolts on the tensioner and allow the tensioner to position itself. Tighten the bolts with a socket wrench. Adjust the belt tension so that the teeth come halfway across the head of the tensioner adjusting bolt when you pull the belt towards the water pump.

Connect the cover for the timing belt with a socket wrench and connect the crankshaft pulley. Fasten the mounting bolts for the water pump pulley and refill the radiator with coolant. Connect the cable to the negative battery terminal.