Question 1

How to remove the camshaft on Toyota Sequoia?

Accepted Answer

The first step to extract a 2UZ-FE camshaft requires fuel system pressure discharge then negative cable terminal disconnection followed by a waiting period of 90 seconds to inhibit the SRS system operation. The first step includes draining engine oil while removing the timing belt before breaking the vacuum hose assembly and removing the fuel pipe clamp. You must disconnect the No. 2 and No. 1 fuel pipe sub-assemblies before removing the fuel pressure pulsation damper assembly together with the air switching valve assembly. When disconnecting the vehicle system the engineer must separate the engine wire by disconnecting the battery terminals together with the air injection control driver connectors. The maintenance procedure starts by removing the ignition coil assembly and spark plug while disconnecting the No. 5 water by-pass hose alongside inlet heater water hose D and removing the No. 1 water by-pass pipe together with its ventilation hose. Removed sequentially from left-hand side are the cylinder head cover sub-assembly LH along with the camshaft position sensor assembly and the camshaft timing pulley sub-assembly LH but only remove the bolts that do not bear arrows. When removing the camshaft sub-assembly of Bank 1 start with the rear timing belt plate LH removal followed by a sequence of operations that includes checking the crankshaft timing pulley timing mark securing the sub-gear with a service bolt aligning camshaft drive/main gear timing marks and performing uniform bolt removal of all 22 bearing cap bolts. Remove the cap bolts combined with seal washers followed by the oil feed pipe, bearing caps, camshaft housing plug, oil control valve filter and camshafts from the engine while maintaining gentle care for the cylinder head thrust reception part. The crankshaft timing pulley needs to remain in its correct position during the same steps that were conducted on Bank 1. The removal of the camshaft timing tube requires a vise to hold the hexagonal camshaft section while using a 10 mm hexagon wrench to take out the bolt and then removing the timing tube assembly along with its drive gear. Special Service Tool 09960-10010, 09962-01000 with the addition of a 5mm hexagon wrench serves to uninstall the 4 bolts and drive gear along with oil seal before extracting the No. 3 camshaft sub gear by rotating it clockwise using these tools, completing the sub gear disassembly with snap ring, wave washer and gear spring removal.

Question 2

How to install the camshaft on Toyota Sequoia?

Accepted Answer

When installing the camshaft start with MP grease applied to the new oil seal lip while keeping all foreign materials away from it. Install two new oil seals through the camshaft timing tube so they meet the stopper while observing proper direction and never rotating the seals' lips. Some necessary steps to follow include putting the drive gear's groove in line with the timing tube knock pin and partially installing the drive gear with four bolts using Special Service Tool: 09960-10010, 09962-01000, 5 mm hexagon wrench at 7.5 Nm (76 kgf-cm, 66 in-lbf) torque. A vise holds the hexagonal camshaft portion while placing the timing tube knock pin directly below the timing tube groove before applying manual pressure to this point until contact occurs. Fasten the bolt using a 10 mm hexagon wrench until it reaches 78 Nm (795 kgf-cm, 58 ft-lbf) torque before applying the seal washer and screw plug with 15 Nm (153 kgf-cm, 11 ft-lbf). To install the No. 3 camshaft sub gear, first assemble the gear spring with sub-gear and wave washer and then install the snap ring using snap ring pliers. To set correct gear tooth alignment between the driven gear and sub-gear you should use Special Service Tool while performing a temporary service bolt installation before tightening the service bolt. To install the Bank 1 camshaft sub-assembly keep the camshaft horizontal to avoid damages while making sure the crankshaft timing pulley position matches correctly before applying engine oil over the cam lobe together with gear and journal then line up the timing marks before mounting the bearing cap with Toyota Genuine Seal Packing Black or Three Bond 1207B or equivalent seal packing. Apply seal packing to the No. 1 bearing cap then swiftly install it within three minutes after putting on the camshaft housing plug and oil control valve filter. Install four new seal washers to the bearing cap bolts while applying engine oil to the threaded parts of bolts C to E. Then place the oil feed pipe and temporarily mount bearing caps using 22 bolts while pushing in the camshaft setting oil seal. Symmetrically tighten bearing cap bolts beginning with 21 and 22 to 7.5 Nm (76 kgf-cm, 66 in-lbf), while all other bolts require 16 Nm (163 kgf-cm, 12 ft-lbf). Fasten the service bolt in the driven sub-gear upwards before removing it to add three rear timing belt plates which require 7.5 Nm (76 kgf-cm, 66 in-lbf) torque. The customer must position the knock pin inside the timing pulley groove before fastening four bolts to the camshaft timing pulley sub-assembly. Then they should grip the camshaft hexagonal portion to torque the bolts to 8.1 Nm (83 kgf-cm, 72 in-lbf). Implement the same installation sequence for Bank 2 using the same safety considerations which were implemented for Bank 1. Tighten the bolts of the cylinder head cover sub-assembly to 10 Nm (102 kgf-cm, 7 ft-lbf) after sealing it with packing and follow the remaining assembly procedures by connecting hoses and installing components while checking for leaks.

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