OEM 2001 Toyota 4Runner Timing Belt

2001 Toyota 4Runner Parts Questions & Experts Answers

• Q: How to Properly Remove and Install a Timing Belt on 2001 Toyota 4Runner?

  A: The timing belt removal demands a sequence of actions that begins with removing the engine under cover and draining engine coolant while disconnecting the upper radiator hose. The PS pump requires separation from the engine when you disconnect both PS air hoses from the air intake chamber and resonator and unfasten the bolt securing the PS pressure tube clamp to the frame along with the drive belt and the PS pump bolt and nut. A vehicle equipped with A/C requires disconnecting the A/C compressor from the engine which requires removing a connector as well as drive belt and four bolts. The procedure will start by loosening the fan coupled to a fluid circuit and fan pulleys followed by the removal of the generator drive belt before extracting the No.2 fan shroud and fan coupled to fluid pulleys and fan pulleys. The bracket of the A/C compressor requires removal through the extraction of five bolts. To proceed with the engine for belt replacement the mechanic must disconnect four high-tension cord clamps then remove six bolts and detach the camshaft position sensor connector from the No.2 timing belt cover. First remove the fan bracket by taking out the PS pump adjusting strut and nut and the bolt and nut. Loosen and remove the crankshaft pulley bolt using Special Service Tools 09213-54015 (90119-08216), 09330-00021 then detach the pulley with Special Service Tool 09950-50012 (09951-05010, 09952-05010, 09953-05020, 09954-05030). Crank up two bolts on the starter wire bracket while bolt out four bolts from the No.1 timing belt cover. First install the crankshaft pulley bolt to achieve TDC/compression of cylinder No.1 then turn the crankshaft to align timing marks while inspecting camshaft timing pulleys alignment. It is vital to inspect the timing belt's installation marks consisting of three and one front mark; create new marks if these are unreadable. Start by releasing two bolts on the tensioner unit to eliminate the timing belt. To remove the RH camshaft timing pulley use Special Service Tool: 09960-10010 (09962-01000, 09963-01000) for unbolt its pulley bolt followed by the bolt and knock pin and pulley removal. Reposition this procedure on the LH timing pulley. Use a 10 mm hexagon wrench to remove first the No.2 idler pulley then the No.1 idler pulley. The removal of crankshaft timing pulley requires Special Service Tool: 09950-50012 (09951-05010, 09952-05010, 09953-05020, 09954-05030). Check the timing belt's condition, it must not have bending, twisting shape nor contact with oil or water or steam and verify its proper installation and wear. The inspection focus must include the idler pulleys for their oil leakage condition as well as their operational smoothness while checking the timing belt tensioner for both oil leakage and correct push rod movements. A measurement of push rod length should fall between 10.0 and 10.8 mm (0.394 - 0.425 inch) before replacing the tensioner unit. After key groove alignment install crankshaft timing pulley followed by torque applications to No.1 idler pulley at 35 Nm (350 kgf-cm, 26 ft. lbs.) while torque to No.2 idler pulley should be 40 Nm (400 kgf-cm, 30 ft. lbs.). Secure the LH and RH camshaft timing pulleys in place by positioning the flange side outward and fasten the pulley bolts with Special Service Tool: 09960-10010 (09962-01000, 09963-01000) while applying 110 Nm (1,100 kgf-cm, 81 ft. lbs.) torque. After setting the No.1 cylinder to TDC/compression the timing belt should go on with exact timing mark alignment. To set the timing belt tensioner apply a 1.27 mm hexagon wrench on the push rod before torquing the tensioner to 27 Nm (280 kgf-cm, 20 ft. lbs.). Brief the final part of valve timing by locating the timing marks in proper position then add the main components as follows: timing belt guide with the No.1 timing belt cover and starter wire bracket. Do this by verifying the gasket quality. Fasten the crankshaft pulley with its new bolt through Special Service Tool: 09213-54015 (90119-08216), 09330-00021 while torquing it to 300 Nm (3,000 kgf-cm, 217 ft. lbs.). Install all components including the fan bracket, No.2 timing belt cover and oil dipstick and guide while completing the procedure with the addition of the A/C compressor bracket when relevant and torque each piece to its specified value. UX-24015-00050 installation enables the temporary attachment of fan equipment through fluid coupling and fan pulley operation before inserting the No.2 fan shroud and adjusting the generator drive belt and finishing by tightening fan equipment. After securing the A/C compressor to the engine engineers need to connect the PS pump before torqueing all connections. The procedure ends with connecting the upper radiator hose followed by filling engine coolant before starting engine leaks checks and reinstalling engine under cover for road testing and another coolant level check.