OEM 2004 Toyota Tundra Timing Belt

2004 Toyota Tundra Timing Belt Parts Questions & Experts Answers

• Q: How to service and repair the timing belt on 2004 Toyota Tundra?

  A: Service and repair of the timing belt requires first step removal of the engine under cover followed by draining engine coolant and disconnecting upper radiator hose. First detach the PS pump from the machine by removing its two air hoses from the air intake chamber and resonator and the bolting down the PS pressure tube clamp to the frame while also removing the drive belt before lastly removing the bolt and nut to disconnect the PS pump. To proceed with disconnecting the A/C compressor from the engine start by taking out the A/C compressor connector and drive belt alongside removing four bolts. First disconnect the generator drive belt and the fan with fluid coupling and fan pulleys while loosening their fan. Then remove the No. 2 fan shroud. Begin with the removal of five bolts which secure the A/C compressor bracket then detach the upper radiator hose and uninstall the No. 2 timing belt cover by disconnecting the camshaft position sensor connector and four high-tension clamps and then remove the six bolts. Take out the PS pump adjusting strut and nut followed by unpulling the fan bracket and its bolt and nut. Using the crankshaft pulley, drivers should set the No. 1 cylinder to TDC/compression before checking that the timing marks on the camshaft timing pulleys and No. 3 timing belt cover correctly align with the timing mark "0" on the No. 1 timing belt cover. You must rotate the crankshaft pulley completely when its position is incorrect. To reuse the timing belt apply matchmarks both on the pulleys and timing belt which should match up with the end of the No. 1 timing belt cover. The timing belt tensioner unveils after slowly unwinding its two supporting bolts followed by timing belt removal. Special Service Tool 09960-10010 (09962-01000, 09963-01000) must be used to loosen the RH camshaft timing pulley bolt while the same tool can be applied to loosen the LH camshaft timing pulley bolt before removing bolt, knock pin and camshaft timing pulley. You need Special Service Tools 09213-54015 (90119-08216) and 09330-00021 to stop the crankshaft pulley bolt before using 09950-50013 including 09551-05010, 09552-05010, 09553-05020 and 09554-05031 to remove the pulley bolt and its attached pulley. Remove the crankshaft timing pulley through the use of a service bolt with Special Service Tool: 09950-50013 (09551-05010, 09552-05010, 09553-05020, 09554-05031) if needed. To proceed with replacement disconnect the starter wire bracket and remove its two mounting bolts and the four bolts securing the timing belt cover. This action enables the removal of both components along with the timing belt guide followed by the belt itself. To reinstall a used timing belt you must add a new installation mark which will correspond to the drilled mark on the crankshaft timing pulley when installation marks vanish. Disassemble the No. 2 idler pulley by clearing its bolt and idler pulley but use a 10 mm hexagon wrench to eliminate the pivot bolt for the No. 1 idler pulley along with its idler pulley and plate washer. The crankshaft timing pulley needs to be removed along with Special Service Tool: 09950-50013 (09951-05010, 09952-05010, 09953-05020, 09954-05011) and service bolt when needed for manual removal. Check the timing belt for defects while confirming no bending or twisting and no presence of oil water or steam on it. Verify that the timing cover gasket is properly arranged and not damaged. The inspection of idler pulleys should include oil leakage checks as well as testing their smooth functioning while inspecting the timing belt tensioner for oil leaks and correct push rod activities. You should verify the push rod extends 10.0 - 10.8 mm (0.394 - 0.425 inch) from the housing end. Install the No. 1 idler pulley through key groove alignment while adding adhesive (Part No. 08833-00080, THREE BOND 1344, LOCTITE 242 or equivalent) before torquing it to 35 Nm (350 kgf-cm, 26 ft. lbs.). Fasten the No. 2 idler pulley using a torque of 40 Nm (400 kgf-cm) which equals 30 ft-lbs. Mount the timing belt for a temporary installation while maintaining a cold engine state before matching the timing marks between the crankshaft timing pulley and oil pump body. Clean all pulleys while placing the timing belt installation mark in line with the crankshaft timing pulley drilled mark and bolt it onto both the crankshaft timing pulley and the No.1 idler pulley together with the water pump pulley. Proceed by fixing the timing belt guide so its cup side points outward then add the No. 1 timing belt cover and starter wire bracket while checking for gasket damage that requires replacement. Configure the crankshaft pulley so its set key matches the key groove before torquing the retaining bolt to 295 Nm (2,950 kgf-cm, 217 ft. lbs.). Synchronize the knock pin hole of the LH camshaft timing pulley with the knock pin groove and torque the bolt to 110 Nm (1,100 kgf-cm, 81 ft. lbs.). Align the pulley set key with the key groove to position the No. 1 cylinder at TDC/compression stages. Set the LH camshaft timing pulley by verifying the installation mark matches with the timing mark then do the same with the RH camshaft timing pulley before torquing the bolt to 110 Nm (1,100 kgf-cm, 81 ft. lbs.). The timing belt tensioner requires you to press in this push rod and align its holes to complete installation before torquing bolts to 27 Nm (275 kgf-cm, 20 ft. lbs.). Validate the valve timing by rotating the crankshaft pulley twice and verify proper alignment between time marks. Montage the fan bracket along with the No. 2 timing belt cover and A/C compressor bracket by torquing them to 47 Nm (479 kgf-cm, 35 ft. lbs.). Install the fan using fluid coupling along with the pulleys before adding the No. 2 fan shroud. The installation of the generator drive belt requires adjustment followed by tight fan connections using fluid coupling and fan pulleys with 5.4 Nm (54 kgf-cm, 48 inch lbs.) torque. The A/C compressor should be attached to the engine with four bolts torqued to 25 Nm (250 kgf-cm, 18 ft. lbs.) and PS pump connection needs proper torque and correct hose installation. The procedure includes attaching the upper radiator hose then adding proper coolant to the engine before checking leaks while putting on the engine under cover during a road test for abnormal sounds and additional checks of shock and slippage and shift points and overall smooth performance. Recheck the engine coolant level afterward.