OEM 2004 Toyota Sequoia Timing Belt

2004 Toyota Sequoia Parts Questions & Experts Answers

• Q: How to remove and reinstall the timing belt on 2004 Toyota Sequoia?

  A: The timing belt removal process begins with taking away the engine under cover and draining engine coolant and removing the radiator assembly. The following steps should include removing the throttle body cover and the intake air connector assembly. Start by unscrewing the 4 nuts that hold the fluid coupling to the fan bracket before removing the drive belt followed by fan, fluid coupling assembly as well as fan pulley. You should detach the PS pump through bolt removal and then suspend it properly while disconnected. Uninstall the drive belt idler pulley by removing its pulley bolt and cover plate and idler pulley. Begin by unscrewing and removing the 3 bolts and nut from the RH No.3 timing belt cover followed by the LH No.3 timing belt cover that requires disconnecting the engine wire from its 2 wire clamps and also requires bolt and nut removal and wire disconnect and cover oil cooler pipe removal. The first step includes taking out two bolts to remove the No.2 timing belt cover followed by disconnecting the A/C compressor from the engine (if necessary) and removing the fan bracket through 2 bolt and 2 nut removal. Check that the timing belt has three marks for installation before removing it because its absence requires pre-removal marking. Adjust the crankshaft pulley bolt's tension with Special Service Tool: 09213-70011 (90105-08076 and 09330-00021 to place the No.1 cylinder at the TDC/compression point where the crankshaft pulley groove matches the No.1 timing belt cover's timing mark "0". The camshaft timing pulleys and timing belt rear plates must have their timing marks correctly aligned before continuing; if realignment requires a one-revolution crankshaft turn. Begin by removing the crankshaft pulley bolt until the timing belt tensioner frees itself. Record new installation marks on the belt when reusing it if possible. Special Service Tool: 09960-10010 (09962-01000, 09963-01000) is required to detach the timing belt from the camshaft timing pulleys before remote of the camshaft timing pulleys with this same tool. Special Service Tool 09950-50013 (09951-05010, 09952-05010, 09953-05010, 09953-05020, 09954-05021) is used for removing the generator drive belt tensioner crankshaft pulley along with the crankshaft pulley bolt. After uninstalling the No.1 timing belt cover together with the timing belt guide and timing belt cover spacer you can remove the timing belt and keep the original markings for reuse. First remove the No.1 idler pulley and No.2 idler pulley with a 10 mm hexagon wrench before removing the crankshaft timing pulley without rotating it. Check the timing belt for defects and inspect the idler pulleys for oil leaks and operation smoothness while also evaluating the timing belt tensioner for oil leakage as well as proper protrusion. Use special service tool 09223-46011 to tap in the crankshaft timing pulley after positioning its timing pulley set key into the key groove. Place gluing adhesive on the pivot bolt of each No.1 and No.2 idler pulley before installing them. The pulleys need to move without resistance. Install the timing belt at room temperature while performing the installation step while also cleaning all components. Put the timing belt cover spacer while also installing its guide before adding the No.1 timing belt cover. Installation of the drive belt tensioner follows crankshaft pulley tapping before verifying the crankshaft pulley alignment. The RH and LH camshaft timing pulleys need installation while connecting the timing belt to each pulley after cleaning them thoroughly. Check valve timing while turning the crankshaft pulley by first temporarily installing the timing belt tensioner followed by setting its belt tension. Use Special Service Tools 09213-70011 (90119-08216), 09330-00021 to bolt down the crankshaft pulley and install the fan bracket and A/C compressor when needed before attaching No.2 timing belt cover and both RH and LH No.3 timing belt covers that must have secure connections. After installing the drive belt idler pulley along with the PS pump and fan pulley and fan and fluid coupling and drive belt, proceed to install the intake air connector assembly and throttle body cover and radiator assembly before filling the system with engine coolant and starting the engine to detect any leaks before a final check of engine coolant level and engine under cover installation.