Saturday, March 8, 2014

Replace The Timing Belt On A 2000 Tundra V8

Replace the Timing Belt on a 2000 Tundra V8

The 2000 Toyota Tundra V8 uses a 4.7L engine, which is an interference motor. This means that should the timing belt stretch past its useful life, the valves will most likely hit the pistons and cause extensive engine damage. Toyota recommends changing the timing belt every 60,000 miles as part of its preventative maintenance. It takes about five hours to change the timing belt and three special tools, which are available at any Toyota dealership.


1. Disconnect the battery ground cable and set it aside, ensuring that it doesn't touch metal. Loosen the tensioners on the accessory drive belts to ease the tension on the belts. Lift the belts off the pulleys. Remove the fan, fluid coupling and the fan pulley using the appropriate sockets. Loosen the radiator drain plug and allow the antifreeze to drain into the drain pan. If the antifreeze looks clean, you can reuse it.

2. Remove the accessory drive belt tensioner pulley and the left upper timing belt cover (as you are looking down at the engine). Unsnap the wiring from the right upper timing belt cover. Remove the oil cooler pipe by unscrewing the fitting on the pipe. Remove the right upper timing belt cover, center timing belt cover and fan bracket using the appropriate sockets.

3. Loosen the crankshaft pulley bolt using the holder and handle. Turn the crankshaft clockwise until the timing mark on the crankshaft lines up with the zero-degree mark at the 11 o'clock position. Check the camshaft timing marks. Both should line up at the 12 o'clock position. If the camshaft timing marks are not lined up, turn the crankshaft one more turn and all three marks should line up.

4. Turn the crankshaft clockwise another 50 degrees until the pulley timing mark is lined up with the guide pulley bolt. The mark (notch) on the crankshaft moves forward to line up with the bolt. The timing marks on the camshaft move forward 25 degrees as the camshaft turns one time for every two times the crankshaft turns.

5. Remove the crankshaft pulley bolt, the auto tensioner bolts and the auto tensioner using the appropriate sockets. Remove the auto tensioner dust boot. Unhook the timing belt from the camshaft sprockets.

6. Take off the crankshaft pulley with the puller, being careful not to turn the crankshaft while removing the pulley.

7. Remove the alternator and the lower timing belt cover using the appropriate sockets. Pull the timing belt guide washer off then remove the timing belt.

8. Check the auto tensioner for oil leakage. If you see evidence of leakage, replace the tensioner. Hold the tensioner upright and push the push rod against a wall or other hard surface. If you can move the push rod, replace the auto tensioner. Measure the push rod. If the visible part of the push rod does not measure between 0.413 and 0.453 inches, replace the auto tensioner.

9. Insert the auto tensioner into a press. Using a force of 220 to 2,205 pounds, press the push rod into the auto tensioner until the hole in the push rod lines up with the hole in the auto tensioner body. Insert an Allen wrench into the holes to hold the push rod in the auto tensioner. Install the boot on the auto tensioner.

10. Install the timing belt onto the crankshaft sprocket, making sure the CR mark on the timing belt lines up with the mark on the sprocket. Route the timing belt up and behind the guide pulley (on the right) and the tensioner pulley (on the left).

11. Install the timing belt guide washer, lower timing belt cover and the crankshaft pulley. Make sure the timing marks are lined up. The crankshaft mark is 50 degrees after top dead center as noted in Step 4.

12. Reinstall the alternator. Bring the timing belt up over the right camshaft sprocket (as you are looking down at the engine). Check that the notation L-CAM lines up with the timing mark on the sprocket. Bring the timing belt under the water pump pulley then over the left camshaft sprocket, ensuring that the letters R-CAM line up with the camshaft sprocket's timing mark.

13. Keep the timing belt taut during the procedure. Install the auto tensioner and tighten the retaining bolts to 19 foot-pounds of torque. Remove the Allen wrench, allowing the tensioner to put tension on the belt.

14. Install the crankshaft pulley bolt temporarily. Turn the crankshaft clockwise almost two turns until the timing marks are aligned (the crankshaft should be at the zero-mark at the 11 o'clock position, not 50 degrees after top dead center). If the timing marks do not line up, remove the belt and repeat the installation procedure from Step 9.

15. Hold the crankshaft pulley with the puller. Tighten the crankshaft pulley bolt to 181 foot-pounds of torque. Install the rest of the parts in reverse order of removal. Refill the radiator.

Tags: replace, timing, belt, 2000, tundra, timing belt, auto tensioner, crankshaft pulley, belt cover, timing belt cover, timing marks, pulley bolt, appropriate sockets, crankshaft pulley bolt