On automatic transmission models, it will be necessary to remove the starter motor (Chapter 5A) and have an assistant wedge a large flat-bladed screwdriver between the driveplate teeth and the transmission casing - ensure the screwdriver doesn't slip. The following steps will help you check the cam timing on an assembled motor. If the sprocket is worn or damaged, or if you need to renew the crankshaft oil seal, remove the sprocket from the crankshaft. Fit the sprocket retaining bolt and tighten it to the specified torque, using a spanner on the hexagonal section of the camshaft to prevent it from rotating. If the VVT-i unit is already in the 'retarded' position (as it should be) the sprocket will not move. Note that the sprocket must be fitted with timing mark facing outwards (see illustrations). 33 Refit the crankshaft angle sensor plate with the B mark (4ZZ-FE) or F mark (3ZZ-FE) facing outwards (see illustration). Years 2000 to 2008. 24 Press the top of the locking pawl on the tensioner assembly to disengage the pawl from the plunger, and check that the plunger moves smoothly in and out of the housing (see illustration). The Toyota 3ZZ has a 79.0 mm (3.11 in) cylinder bore and 81.5 mm (3.21 in) piston stroke. 12 Undo the 6 bolts and remove the coolant pump (see illustration). If it isn't, use your finger or a screwdriver to push the slipper against the tensioner plunger and release the hook (see illustration). Most higher-displacement engines have a timing chain as opposed to a timing belt. 41 Fit a new O-ring seal to the coolant pump. 5.16 Check the timing belt for cracked and missing teeth, 5.18 Wear on one side of the belt indicates sprocket misalignment problems. 5.14 Paint marks (arrowed) on the crankshaft sprocket and the oil pump case so you can find TDC. 27 Slowly turn the crankshaft clockwise two complete revolutions (720-degrees), then tighten the idler pulley mounting bolt to the torque listed in this Chapter's Specifications. Measure the deflection of the belt on the radiator side, halfway between the camshaft and crankshaft sprockets, and compare it to this Chapter's Specifications. This is to ensure it's locked in the 'retarded' position. 16 If the belt teeth are cracked or missing (see illustration), the distributor (where applicable), oil pump or camshafts may have seized. If the measurement obtained is less than that given in the Specifications, renew the chain and all the sprockets. 18 If there is wear or damage on only one side of the belt, check the belt guide and the alignment of the sprockets (see illustration). Note: The following procedure applies only to the 4E-FE and 4A-FENon-VVT-iengines. 32 Refit the tensioner slipper and tighten the retaining bolt to the specified torque. 3. Notice: S use a shop rag to protect the engine. Check chain for wear. 8 As the VVT-i unit is integral with the intake. 13 If the camshaft sprocket is worn or damaged, hold the front (exhaust) camshaft with a large wrench and remove the bolt, then detach the sprocket (see Section 10). timing chain kit . 11 Undo the two nuts and remove the chain tensioner assembly (see illustration). Toyota Corolla 2004 1zz-fe VVTI engine timing chain and marks How to check timing chain status VVT-i engine Toyota Corolla. 40 Turn the crankshaft clockwise until the notch in the crankshaft pulley is aligned with the 0 on the timing plate located at the front of the engine, and check that the marks on the camshaft sprockets align with the top of the cylinder head (see illustrations 3.6 and 3.7b). 9 Support the engine from underneath with a jack (use a wood block on the jack, but don't place the block under the oil sump drain plug). 15 If the timing belt broke during engine operation, the belt may have been contaminated or over-tightened. 6.19 Undo the bolts (arrowed) and remove the chain guide illustration). Rooms manufacturer 11115-22030, 11115-22050, 11115-22040, JA11215, KA103271, RG0004S, 11115-22031, RG0001S, N02104, RG0001K, 11115-22041 ... Oil seal chain tensioner The gasket of the timing chain tensioner Toyota 1ZZ-FE 3ZZ-FE 4ZZ-FE ring 25 Reinstall the lower timing belt cover and crankshaft pulley and recheck the TDC marks. Repeat this procedure on the exhaust camshaft sprocket. If you're removing the belt for camshaft seal renewal or cylinder head removal, it isn't necessary to detach the belt from the crankshaft sprocket or, on 1.6 litre engines, to unbolt the right engine mount. 21 Remove all dirt, oil and grease from the timing belt area at the front of the engine. 36 Press in the top of the locking pawl to disengage it from the chain tensioner plunger, then use a finger to press the plunger fully into the tensioner housing, and retain it in place with the hook (see illustrations). 06 PCS TIMING CHAIN KIT (AS ILLUSTRATED WITHOUT VVTi GEAR) INCLUDES 1 x TIMING CHAIN, 2 x GUIDES, 1 x TENSIONER & 2 x SPROCKETS. 65. 31 Refit the timing chain guide and tighten the bolts to the specified torque. 4 The filter is located at the timing chain end of the cylinder head. If necessary, using a tubular spacer (deep socket) and a hammer, tap the sprocket fully into position. 11 Insert the filter into the cylinder head. Compression ratio rating is 10.5:1. 6 Disconnect the wiring plug from the control valve, and connect an ohmmeter to the valve terminals. Note: Professionals recommend renewing the belt whenever it is removed, since belt failure can lead to expensive engine damage. 01: 13561-22020, CHAIN GUIDE NO. Note: The intake sprocket with the VVT-i mechanism will be locked in the 'retarded' position. Lower the primary chain with left side sprocket through the left cylinder head opening. 5.17 If the face of the belt is cracked or worn, check the idler pulleys for nicks or burrs or damage is noted or if it is the least bit questionable. 21 Pull the timing chain taut by hand, and measure the length of 16 pins (see. Removal. 13 Undo the bolt and remove the crankshaft position sensor from the timing cover, then undo the bolt securing the wiring loom bracket clip and move the sensor to one side. Timing Mark A10080. align with the marks on the sprockets (see illustration). 3 Undo the bolt and withdraw the valve from the cylinder head (see illustration). 1 Block the rear wheels and set the handbrake. The liners are fused into the block and their special rough outer surface promotes strong connection. Discard the coolant pump O-ring seal, a new one must be fitted. There is no need to disconnect the fluid pipes from the pump, suspend it from the front panel/ cowling using cable ties/wire. 2ZZ-GE [12] OR [13]. 4. There’s a lot of confusion around checking the cam timing on the 2ZZ-GE. 2 Loosen the nuts on the right front wheel and raise the vehicle. engine model: 1zz-fe/2zz-fe 4cyl dohc1998-2003 . The chain is located in the front of the motor and is attached to a set of gears and pulleys that power multiple mechanical components, including the crankshaft and camshaft. Caution: DO NOT start the engine until you're absolutely certain that the timing belt is installed correctly. 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