Question 1

How to remove the camshaft on Toyota Land Cruiser?

Accepted Answer

The first step to remove the 3UR-FE engine camshaft includes draining fuel from the system while following it with negative battery terminal cable disconnection for at least 90 seconds of SRS system disablement. Start by taking out the upper radiator support seal together with the radiator grille and front bumper cover and transmission oil cooler air duct (if equipped) and remove the radiator side deflectors. The maintenance sequence starts with removing the front fender main seals together with the front wiper arms, hood to cowl top seal, cowl top ventilator louver sub-assembly and front fender splash shields. Start with No. 1 and No. 2 under engine covers together with the front fender apron seals before emptying the engine oil and coolant to remove the V-bank cover sub-assembly and air cleaner hose assembly and final air cleaner assembly. Detach the No. 1 and No. 2 radiator hoses, fan shroud, and radiator assembly, followed by disconnecting the engine wire, air pump hose and wire harness, No. 2 water by-pass pipe, cooler compressor assembly, No. 2 fuel tube sub-assembly, oil filter element, engine oil level dipstick guide, oil pressure sender gauge assembly, No. 2 water by-pass pipe sub-assembly (if equipped with oil cooler), No. 1 oil cooler bracket (if equipped with oil cooler), oil filter bracket (if equipped and not equipped with oil cooler), and the intake manifold. Disconnect the vane pump assembly, oil cooler pipe assembly, and remove the generator assembly, No. 1 water by-pass hose, water by-pass pipe sub-assembly, front water by-pass joint, No. 2 engine cover, No. 1 engine cover, air tube sub-assembly, water inlet housing, water pump pulley, No. 1 idler pulley sub-assembly, fluid coupling bracket, V-ribbed belt tensioner assembly, ignition coil assembly, cylinder head cover sub-assemblies (LH and RH), spark plug tube gasket, crankshaft pulley, wire harness clamp bracket, timing chain cover sub-assembly, and water inlet pipe. Set the No. 1 cylinder to TDC/compression to remove the sequence starting with the No. 1 chain tensioner assembly (LH) and continuing through the other components listed. First detach the crankshaft timing gear key then use the knock pin to start removing the 10 and 18 bearing cap bolts in sequence before removing the 6 bearing caps with the camshaft at level position. Sequence the removed components before extracting the camshafts from numbers 3 and 4. You should gently pry apart the left-hand camshaft housing sub-assembly while being cautious of the contact surfaces. Continue the process of camshaft bearing cap (RH) replacement and camshaft housing sub-assembly (RH) maintenance exactly as done for the first parts before moving on.

Question 2

How to install the camshaft and related components on Toyota Land Cruiser?

Accepted Answer

You should begin by applying engine oil to all camshaft journals as well as camshaft housings and bearing caps before installing the No. 1 and No. 2 camshafts properly using the marks on the bearing caps. Place the temporary mount of the 10 bolts according to their designated sequence. Following the correct installation of valve rocker arms, apply Toyota Genuine Seal Packing Black, Three Bond 1207B or equivalent in a continuous line using standard 3.5 to 4.0 mm (0.138 to 0.157 in.) seal diameter and wipe off any contact surface oil. Apply seal packing and install the camshaft housing within 3 minutes and torquing begins immediately after 15 minutes using 10 Nm (102 kgf-cm, 7 ft-lbf) for bolt A and 30 Nm (306 kgf-cm, 22 ft-lbf) for the other bolts then tightening the 10 bolts to 16 Nm (163 kgf-cm, 12 ft-lbf) in the specified order. The engine startup must wait at least 2 hours after the installation timeline ends while ensuring the camshaft knock pin is appropriately placed prior to camshaft housing setup. The installation process must be repeated for the No. 3 and No. 4 camshafts and their corresponding bearing caps together with housing. The technician must install the crankshaft timing gear key while setting the first cylinder to TDC/compression before adding the No. 2 chain tensioner assembly and subsequently installing other components in a specific order. Continue by tightening the camshaft timing gear assembly, checking the No. 1 cylinder to TDC/compression, and installing the water inlet pipe, timing chain cover sub-assembly, spark plug tube gasket, cylinder head cover sub-assembly LH and RH, ignition coil assembly, crankshaft pulley, and connecting various components including the wire harness clamp bracket, no. 1 idler pulley sub-assembly, water pump pulley, water inlet housing, air tube sub-assembly, engine covers, water by-pass joint, water by-pass pipe sub-assembly, no. 1 water by-pass hose, generator assembly, oil cooler pipe assembly, vane pump assembly, intake manifold, oil filter bracket, oil pressure sender gauge assembly, engine oil level dipstick guide, oil filter element, and various connections for fuel tubes, cooler compressor assembly, water by-pass pipes, air pump hose, engine wire, radiator assembly, fan shroud, radiator hoses, air cleaner assembly, air cleaner hose assembly, v-bank cover sub-assembly, and finally adding engine oil and coolant, connecting the negative battery terminal, and inspecting for oil and coolant leaks, engine oil level, ignition timing, and engine idle speed before installing the front fender apron seals, engine under covers, splash shields, cowl top ventilator louver, hood to cowl top seal, front fender main seals, front wiper arms, radiator side deflectors, transmission oil cooler air duct, front bumper cover, radiator grille, and upper radiator support seal.

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