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How to Replace the Timing Belt on a 1MZ FE Engine

The 1MZ-FE is a six-cylinder 3.0-liter engine with a dual overhead camshaft. Toyota made the engine from 1994 to 2006 and appears in a variety of Toyota vehicles from that period, such as the Camry. The 1MZ-FE uses a timing belt to keep the camshaft synchronized with the crankshafts. A timing belt is quieter than a timing chain but it also requires replacement at regular intervals, typically at least 60,000 miles.

Instructions

1

Disconnect any component needed to access the timing belt covers. Remove the mounting bolts on the lower timing belt cover with a socket wrench and disconnect the lower cover. Release the clamp for the engine wire protector on the rear timing belt cover and detach the engine protector. Remove the mounting bolts for the upper timing belt cover and disconnect the upper cover.

2

Disconnect the bolts for the right engine mounting bracket with a socket wrench and remove the bracket. Disconnect the the guide for the timing belt.

3

Turn the crankshaft clockwise to align the timing marks for the timing belt. The groove on the crankshaft pulley must align with the mark on the oil pump. The timing marks on the camshaft pulleys must align with their respective marks on the rear timing belt cover.

4

Remove the bolt for the crankshaft pulley with a socket wrench. Loosen the two bolts for the timing belt tensioner alternately to keep the timing belt aligned. Disconnect the timing belt tensioner and its dust protector. Detach the timing belt from the pulleys.

5

Align the mark on the front of the new timing belt with the dot on the crankshaft pulley. Align the installation marks on the timing belt with the marks on the camshaft pulleys. Install the timing belt onto the crankshaft pulley, water pump pulley, left camshaft pulley, No. 2 idler pulley, right camshaft pulley and No. 1 idler pulley in that order.

6

Press the push rod on the timing belt tensioner into its housing to align the hole in the push rod with the hole in the housing. Place an Allen wrench with a diameter of 0.05 inch into the holes to hold the push rod in place.

7

Attach the dust protector for the timing belt pensioner with a socket wrench and install the tensioner. Tighten the two mounting bolts for the timing belt tensioner alternately, and torque them to 20 foot-lbs. with a torque wrench. Remove the Allen wrench from the holes in the timing belt tensioner.

8

Turn the crankshaft clockwise to align the timing marks if necessary. Replace the guide for the timing belt. Tighten the bolt for the crankshaft pulley to 159 foot-lbs. with a torque wrench. Connect the right mounting bracket for the engine, and tighten its bolts to 21 foot-lbs.

9

Replace the upper cover for the timing belt and tighten its mounting bolts to 74 inch-lbs. with a torque wrench. Connect the engine wire protector to the rear cover of the timing belt and attach its clamp. Install the lower cover for the timing belt and tighten its mounting bolts to 74 inch-lbs. with a torque wrench. Install any remaining components you removed in Step 1 to access the timing belt covers.