How to Change the Timing Belt in Toyota Cars

by Contributing Writer

If you fail to repair or replace your timing belt, you run the risk of causing severe damage to your Toyota car engine. In addition, you could end up stranded with your truck out of order due to a broken timing belt. Your timing belt probably needs to be replaced if you hear slapping or screaming noises coming from your engine. Keeping a schedule of routine maintenance is recommended, and replacing the timing belt is easy.

Under The Hood:

 How to Change the Timing Belt in a 2003 Toyota Corolla

Disconnect the positive battery cable and set it to the side. Chock the wheels to prevent the car from moving.

Remove any obstructions to the timing cover. There are a few parts that obstruct access to the timing belt cover, including the air intake assembly, water pump pulley, power steering pump and air conditioning compressor. Remove the parts and set them to the side.

Use a 10mm wrench to align the mark on the crankshaft pulley to zero on the timing scale. Remove the bolts from the timing belt cover and set it aside.

Place G clamps on the camshaft and crankshaft seals to prevent them from slipping. Align the timing belt pulley mark with the timing mark on the front of the engine. The timing mark on the engine is shaped like a "V."

Remove the old belt and put on the new belt. Make sure it directly covers the teeth of the timing sprockets.

Remove the G clamps and put the timing cover back on. Return all the parts that obstructed the timing cover back to their proper places. Plug the positive battery cable back in.

Items you will need

  • Wheel chock

  • 10mm wrench

  • Replacement timing belt

 How to Change the Timing Belt on a 2006 Toyota Sienna

Disconnect the cable from the negative battery terminal with a socket wrench. This prevents anyone from unintentionally starting the engine during the timing belt replacement.

Disconnect the windshield wiper arm assemblies with a socket wrench. Remove the cowl panel and its seal. Detach the windshield washer hose, and disconnect the cowl top louvers. Unplug the electrical connector for the windshield wiper motor and disconnect the cowl top panel.

Raise the vehicle with a jack and support it on jack stands. Disconnect the right front wheel with a lug wrench. Remove the bolts for the accessory drive belt and remove the drive belt. Detach the electrical connector for the alternator and loosen the mounting bolts for the alternator. Remove the alternator.

Disconnect the mounting bolts for the power steering pump and remove its drive belt. Detach the coolant reservoir hose. Disconnect the diagnostic link connector from the No. 2 right mounting bracket for the engine. Disconnect the engine's right mounting stay, moving control rod and No. 2 right mounting bracket.

Remove the bolt for the crankshaft pulley with tools 09213-54015, 91651-60855 and 09330-00021. Pull the crankshaft pulley from the crankshaft with tools 09950-50011, 09952-5010, 09953-05010, 09953-05020 and 09954-05020.

Disconnect the lower cover for the timing belt with a socket wrench. Remove the guide for the timing belt from the crankshaft. Release the clamps on the the upper timing belt cover and disconnect the upper timing belt cover. Remove the right mounting brace for the engine. Install the bolt for the crankshaft pulley temporarily.

Turn the crankshaft clockwise to align the dimple on the crankshaft sprocket with the notch on the oil pump. Disconnect the tensioner for the timing belt and the timing belt.

Install the new timing belt on the crankshaft sprocket, water pump pulley, left camshaft sprocket, No. 2 idler pulley, right camshaft sprocket and No. 1 idler pulley in that order. Push the pushrod into the housing for the timing belt tensioner with vertical press 98,1-9807 to align the holes in the tensioner housing. Place a 1.27mm Allen wrench to hold the pushrod in place and release the vertical press.

Install the tensioner for the timing belt and tighten the mounting bolts to 20 ft. lbs. with a torque wrench. Remove the Allen wrench from the housing on the belt tensioner and turn the crankshaft clockwise two complete turns so that the timing marks align.

Remove the bolt for the crankshaft pulley with a socket wrench. Connect the right mounting bracket for the engine and tighten its bolts to 21 ft. lbs with a socket wrench. Install the upper cover for the timing belt and connect the guide for the timing belt so that its cup side faces down. Connect the lower cover for the timing belt.

Install the crankshaft pulley with tools 09213-54015, 91651-60855 and 09330-00021. Tighten the mounting bolts to 159 ft. lbs. with a torque wrench. Perform steps one through four in reverse order to install the additional components. Start the engine and check for oil leaks.

Items you will need

  • Socket wrench set

  • Lug wrench

  • Torque wrench

  • Tool 09213-54015

  • Tool 91651-60855

  • Tool 09330-00021

  • Tool 09950-50011

  • Tool 09952-5010

  • Tool 09953-05010

  • Tool 09953-05020

  • Tool 09954-05020

  • Tool 981-9807

  • 1.27mm Allen wrench

  • Replacement timing belt

 How to Replace the Timing Belt on a Toyota T100

Disassembly

Remove the engine's undercover.

Remove the radiator cap under the car, which resembles a household spigot. While wearing gloves, drain the engine coolant from the radiator drain valve by removing the radiator drain plug.

Remove the upper radiator hose by using a flathead screwdriver to loosen the hose clamp. Loosen the clamp and slide it down the hose, tightening it slightly to keep it in place. Remove the hose.

Disconnect the two power steering hoses from the air intake chamber by simply removing the power clamp bolt. The hoses should be easy to pull out of place. Move the power steering pressure tub close to the frame. Remove the power steering drive belt by simply unbolting the belt from the power-steering pump and loosening the lower mount bolt. This will allow you to pull the belt off of the pulley. Finally, loosen the adjuster clamp nut with a wrench, unbolt the adjuster bracket from the water pump housing, and remove the pump by slowing pulling it out of the area.

Find the suction hose that fits onto the compressor and remove it. Detach the compressor's electrical connector and mounting bolts with your wrench. This should free the compressor and allow you to pull it out of the area. Remove the compressor.

Remove the bolt, oil dipstick, dipstick tube and the O-ring. These are easy to identify because you use them when checking your oil levels. There should be an O-ring attached to a tube that indicates oil, and the oil dipstick is attached to that O-ring to make removing it simple. Use your wrench to remove the bolt holding these items in place, and then slowly remove them.

Remove the timing belt cover by disconnecting the four spark plug wire clamps as well as the six bolts around the cover with your wrench. If there are any signs of leakage from the seals of the timing pulleys, such as cracks and tears, stop working and call a professional mechanic. If the timing pulleys are in good working condition, remove the fan bracket and the crankshaft pulley. These items are attached to the engine's vibration dampener. Simply remove the bolts holding them in place with your wrench, then remove from the area. Remove the two bolts on the starter wire bracket as well as the four bolts on the cover of the number one belt cover.

Remove the timing belt guide, which resembles a large washer, on the crankshaft.

Remove the timing belt tensioner, the timing belt, and the camshaft timing pulleys by slowing pulling them out of place.

Assembly

Install the crankshaft timing pulleys using 130 ft.-lbs. of torque with the torque wrench. Align the pulley set key with the key groove of the timing pulley and slide it onto the timing pulley, ensuring that the flange side is facing inward.

Install the timing belt. Be sure that no water or oil is on the belt. To start, face the front mark of the timing belt forward, and then install the timing belt to the lefthand timing pulley. Ensure that the alignment marks on the pulleys and the top of the crankshaft gear match. Repeat this process with the righthand pulley.

Set the timing belt tensioner, and install it using your Allen wrench. Slowly press in the push rod, aligning the holes of the push rod and housing. Replace the dust boot of the tensioner, and then install the two bolts that had been removed originally.

Check the valve timing. Install the timing belt guide with the cup side facing forward and the smooth side facing the belt. Turn the crankshaft clockwise and align the timing marks of the crankshaft timing pulley to the oil pump body. When the timing marks are aligned, remove the crankshaft pulley bolt. Install the timing belt guide plate, which holds the belt in place while the belt moves.

Install the timing belt cover with torque of 80 lbs. using your torque wrench on the four bolts that hold it in place. Install the fan bracket, belt cover, oil dipstick and guide, making sure the O-ring is in place to seal the dipstick tube. Install the fan bracket with one bolt and nut, and install the timing belt cover with six bolts. Install the oil dipstick, guide and O-ring by attaching the single bolt on each to the generator bracket.

Continued Assembly

Install the A/C compressor bracket with a torque of 35 lbs. using your torque wrench.

Install the fan shroud and the alternator belt using your wrench. Reattach the bolts you removed during disassembly.

Tighten the fan with the fluid coupling and the fan pulley with 65 lbs. of torque using the torque wrench.

Connect the A/C compressor to the engine with 18 lbs. of torque using your torque wrench on the four bolts removed during disassembly. Install and adjust the belt with 31 lbs. of torque with the torque wrench, and connect the power steering pump to the engine.

Reconnect the upper radiator hose by putting it back in place and tightening the hose clamp. Fill the engine with new coolant and check for leaks, which will be indicated by fluid coming through cracks and tears around the timing belt. If there are no leaks, install the engine under the cover by snapping it into place.

Perform a road test to see if there are any abnormal noises. If you do not notice any abnormal sounds, you have successfully replaced the timing belt of your Toyota T100. If there are any indications of a problem such as noise, shock or slippage, you may need to repeat this process.

Items you will need

  • 250 ft.-lb. torque wrench

  • Crankshaft pulley

  • Allen wrench

  • Gloves

  • Flathead screwdriver

 How to Replace the Timing Belt on a 91 Celica GT

Disconnect the battery's ground cable and lay the cable aside. Jack up the Celica GT and support it with jack stands. Remove the engine splash guard and the intercooler using the appropriate sockets. Remove the accessory drive belt by loosening the tensioner and removing tension on the belt.

Remove the alternator and its bracket using the appropriate socket and wrench. Remove the right front wheel using the lug wrench. Remove the right fender apron shield using the appropriate size socket.

Place the block of wood on the floor jack. Support the engine with the floor jack by jacking it up just until it touches the bottom of the engine. Remove the right engine mount and the mount bracket using the appropriate sockets. Remove the upper timing belt cover.

Turn the crankshaft clockwise until the timing marks on the crankshaft and the camshaft line up. If the marks do not line up the first time around, turn the engine again, and the marks should line up. The crankshaft mark is at 11 o'clock and the camshaft timing marks are at 12 o'clock.

Remove the auto tensioner securing bolts and the auto tensioner using the appropriate sockets. Remove the crankshaft pulley bolt using the appropriate socket. Remove the pulley using the special tool #09213-31021. Remove the lower timing belt cover and the belt guide washer. Remove the tensioner pulley retaining bolt and the tensioner pulley using the appropriate sockets. Remove the timing belt. Check the tensioner pulley to make sure it rotates smoothly. If not, replace the tensioner pulley.

Install the tensioner pulley and tighten the bolt to 38 foot-pounds of torque. Inspect the auto tensioner for oil leakage. If it leaks, replace it. Press the pushrod against a hard surface. If you can move the pushrod, replace the auto tensioner. Measure the pushrod where it exits the auto tensioner. If the measurement is not between .34 and .37 inches, replace it.

Install the timing belt, starting at the crankshaft sprocket and oil pump sprocket (at the same time) and working counterclockwise around the guide pulley and water pump pulley. Install the belt guide washer and the timing belt lower cover.

Install the crankshaft pulley and the crankshaft pulley bolt. Tighten the crankshaft pulley bolt to 80 foot-pounds of torque. Check the crankshaft timing mark to ensure it is still aligned. The notch in the pulley should line up with the zero mark on the timing scale printed on the block.

Install the timing belt around the camshaft sprockets and behind the tensioner pulley, keeping the timing belt tight on the non-tensioned side (right side while facing the engine).

Push the pushrod in the auto tensioner using a vise or press. Insert an Allen wrench through the hole in the body of the auto tensioner and into the hole in the pushrod once they line up to hold the pushrod in place. Tighten the tensioner pulley bolt to 13 foot-pounds of torque. Install the auto tensioner. Tighten the bolts just enough to hold it in place. Leave the torque wrench on the bolt, ensuring that the handle lines up with the camshaft sprocket.

Turn the crankshaft clockwise 5/6 of a turn, aligning the crankshaft pulley mark (the pointer mark, not the notch mark) with the 60-degree BTDC mark on the timing cover.

Loosen the auto tensioner bolts. Insert the 0.75-inch feeler gauge between the auto tensioner's body and the tensioner pulley bracket. Hold the tensioner in place and tighten the auto tensioner bolts to 15 foot-pounds of torque. Remove the feeler gauge, the Allen wrench and the torque wrench from the tensioner pulley bolt.

Turn the crankshaft clockwise for one turn, lining up the crankshaft pulley mark (the notch, not the pointer) to the 60-degree BTDC mark on the timing cover. Measure the distance between the auto tensioner body and the tensioner pulley bracket with the feeler gauges. The measurement needs to be between 0.071 and 0.087 inches. If the clearance is incorrect, repeat the entire timing belt installation procedure.

Turn the crankshaft clockwise 2 1/6 turns until the No. 1 cylinder is at top dead center. To ensure the No. 1 cylinder is at top dead center, insert a long screwdriver into the spark plug hole while turning the engine. When you feel the piston come up to the top of the bore, the cylinder is at top dead center. Check that the timing marks are still lined up. Install the rest of the parts in reverse order of removal.

Items you will need

  • Set of wrenches

  • Floor jack

  • Jack stands

  • Set of sockets

  • Special tool puller #09213-31021

  • Lug wrench

  • 6-inch 2-by-4-inch block of wood

  • Torque wrench

  • Vise or press

  • Allen wrench

  • Set of feeler gauges

 How to Replace a Timing Belt on a Toyota Corolla

Disconnect the battery ground cable and lay it aside, ensuring that it does not touch metal. Jack up the front of the Corolla using the floor jack, and support it with jack stands. Remove the right wheel using the lug wrench. Remove the right splashguard using the appropriate sockets.

Remove the windshield washer reservoir using the appropriate socket. Unbolt the cruise control actuator and remove it using the appropriate sockets. Loosen the accessory drive belt tensioners to release tension on the belts. Lift the belts off the pulleys.

Support the engine with the floor jack by jacking it up just enough to touch the bottom of the oil pan. Remove the right engine mount using the appropriate brackets. Unbolt the air conditioning compressor, but do not remove the air conditioning lines. Move the compressor out of the way. Remove the water pump pulley, valve cover, upper timing belt cover and the middle timing belt cover using the appropriate sockets.

Turn the crankshaft clockwise until the timing mark on the crankshaft pulley lines up with the dot on the block at the 1 o’clock position. Check the timing mark on the camshaft. The small hole in the sprocket should line up with the dot on the head at the 12 o’clock position. If it is not lined up, turn the crankshaft one more turn, and both marks will line up.

Remove the crankshaft pulley bolt using the holding tool and handle. Pull the pulley off using the puller. Remove the lower timing belt cover and belt guide using the appropriate sockets. Check that both timing marks are still lined up.

Loosen the tensioner bolt and push the tensioner away from the belt. Tighten the bolt just enough to hold the tensioner out of the way. Lift the timing belt off the sprockets and pulleys.

Remove the tensioner pulley. Spin the pulley in your hand. If you hear it squeaking or grinding, replace it. If it has any resistance, replace it. Remove the tensioner spring and measure it. If the spring is not 1.40 inches from end to end on the 4A-FE engine (code is on the sticker on the hood) or 1.25 inches on the 7A-FE engine, replace the tensioner spring. Install the tensioner pulley and spring. Check that the timing marks are still lined up.

Look at the timing mark on the crankshaft. If your engine has a dot on the block that lines up with a notch in the pulley, install the timing belt in a counterclockwise direction, starting on the crankshaft, working up to the camshaft sprocket and keeping tension on the belt between the two. Bring the belt down behind the tensioner.

If your engine has a gauge on the block and a notch in the pulley, put the timing belt around the bottom of the crankshaft sprocket. Install the belt guide, the timing belt lower cover, the crankshaft pulley and the bolt. Tighten the pulley bolt lightly. Make sure the crankshaft timing marks are lined up. Working counterclockwise, bring the belt up to the camshaft, keeping tension on the belt between the two sprockets. Remove the plug from the lower timing belt cover.

Loosen the tensioner bolt. Turn the crankshaft clockwise two turns until both timing marks line up. Tighten the tensioner bolt to 27 foot-pounds of torque. Apply a force of 4.4 lbs. to the belt, halfway between the camshaft sprocket and the crankshaft sprocket. If the deflection is not between 0.20 inches and 0.24 inches, repeat the tensioning process (Step 9).

Remove the crankshaft pulley bolt (if it was reinstalled). Install the rest of the parts in reverse order of removal. Tighten the crankshaft pulley bolt to 87 foot-pounds of torque.

Items you will need

  • Set of wrenches

  • Floor jack

  • Jack stands

  • Lug wrench

  • Puller No. 09213-31021

  • Crankshaft pulley holding tool handle No. 09330-00021

  • Crankshaft pulley holding tool No. 09213-14010 (for Corolla 1993 and 1994)

  • Crankshaft pulley holding tool No. 09213-70010 (for Corolla 1995 through 1997)

  • Torque wrench

 How to Replace the Timing Belt on a 1999 Toyota Camry

Disconnect the negative battery cable and lay it to the side, ensuring it does not touch metal. Jack the front of the Camry up and support it with jack stands. Pull the hoses off the reservoir tank, then unbolt and remove it from the vehicle.

Loosen the tensioners for the accessory drive belts by pushing the tensioners away from the belt or by loosening the locknuts on the accessory slider brackets and pushing the accessory toward the engine. Lift the accessory drive belts off the pulleys. Remove the alternator and its bracket using the appropriate socket.

Remove the right front wheel using the lug wrench. Remove the right front fender shield using the appropriate sockets. Place the block of wood on the floor jack. Push the jack under the oil pan. Jack it up enough so that the wood touches the bottom of the oil pan, so that the engine is supported. Remove the right engine mount bracket and the support rod, and the upper timing belt cover using the appropriate sockets.

Number the spark plug wires so you know where they go when you put the Camry back together. The cylinder order is 1-2-3-4, with the No. 1 cylinder wire closest to the timing belt. The firing order is 1-4-3-2. Pull the wires off the spark plugs. Remove the spark plugs using the spark plug socket.

Stick the long screwdriver in the No. 1 cylinder hole. While holding the screwdriver, turn the crankshaft clockwise until the screwdriver stops moving. This means that the piston is at the top of the piston hole. Check the timing mark on the crankshaft. If the dot on the sprocket is not lined up with the mark at the 2 o'clock position, turn the crankshaft one more full revolution, until the screwdriver stops moving again. Check the timing mark on the crankshaft and the camshaft--the dot on the camshaft sprocket should be lined up with the mark on the head at the 12 o'clock position.

Remove the crankshaft pulley bolt using the appropriate socket. Using the puller, pull the crankshaft pulley off. Remove the lower timing belt cover using the appropriate sockets, then pull the belt guide washer off.

Loosen the tensioner bolt and push the tensioner away from the belt. Tighten the bolt just enough to hold the tensioner out of the way. Lift the timing belt off the sprockets.

Remove the tensioner pulley and the spring. Spin the tensioner in your hand. If it grinds or has a lot of resistance, replace the pulley. Measure the tensioner spring from end to end. If the measurement is not 1.81 inches, replace the spring. Install the tensioner pulley and spring. Push the tensioner to the left and tighten the bolt just enough to hold it in place.

Install the timing belt, starting at the crankshaft sprocket. Working clockwise, route the belt around the outside of the oil pump pulley, then behind the tensioner. While holding the belt with one hand, route the belt around the back of the idler pulley on the right side of the engine (while looking down at the engine), then around the water pump sprocket.

Install the belt guide washer, the lower timing belt cover, the crankshaft pulley and the crankshaft pulley bolt. Tighten the crankshaft pulley bolt hand tight. Check that the timing marks are still aligned.

Finish routing the timing belt by bringing it up over the camshaft sprocket, keeping hand tension on the right side, between the crankshaft, idler, water pump pulley and the camshaft sprocket.

Tighten the crankshaft pulley bolt to 80 foot-pounds of torque. Loosen the timing belt tensioner bolt one-half turn, to allow the tensioner to put tension on the timing belt.

Turn the crankshaft clockwise two turns until all timing marks are realigned. If the tension spring is silver, tighten the tensioner bolt to 31 foot-pounds of torque. If the spring is green, turn the crankshaft 1 7/8 turns until the pulley notch lines up with the 45-degree mark on the lower timing belt cover. Tighten the tensioner bolt to 31 foot-pounds of torque. Install the rest of the parts in reverse order of removal. Refill the radiator as needed.

Items you will need

  • Set of wrenches

  • Floor jack

  • Jack stands

  • Set of sockets

  • Lug wrench

  • 6-inch block of 2-by-4-inch wood

  • Spark plug socket

  • Long screwdriver

  • General purpose puller

  • Torque wrench