Toyota 13506-75010
Timing Chain

Start the removal of the timing chain by first unclipping the engine under cover and draining the engine oil. The front differential and drive shafts and generator drive belt and fluid coupling fan and water pump pulley must be detached before beginning the work in 4WD models. The procedure starts with separating the cylinder head assembly followed by divorcing the A/C compressor along with bracket through the elimination of 4 bolts while suspending the compressor. Remove the 4 bolts followed by disconnection of the A/C compressor bracket then proceed with generator connector disconnection followed by the removal of a nut and wire clip which allows generator extraction along with its adjusting bar and bracket. To remove the crankshaft position sensor use appropriate tools to take out its two bolts with O-ring. During 2WD model replacement the 8 bolts must be removed from the stiffener plates. The technician should remove the flywheel housing under cover and dust seal before taking out the oil pan by unthreading 16 bolts and 2 nuts using SST 09032-00100 to cut off the applied sealer. The oil strainer and crankshaft pulley with SST 09213-54015 and 09330-00021 tools need to be removed by loosening water bypass pipe nuts and timing chain cover bolts. SST 09950-40011 allows the operator to remove No.1 timing chain and camshaft timing sprocket followed by crankshaft timing sprocket. The maintenance proceeds with removal of No.1 timing chain tensioner slipper and No.1 vibration damper as well as the crankshaft position sensor rotor and timing chain oil jet on 2RZ-FE models. Installation of balance shaft drive gear and shaft along with No.2 timing chain and No.2 crankshaft timing sprocket requires the removal of No.2 and No.3 vibration dampers as well as the No.2 chain tensioner for 3RZ-FE models. Check the timing chains and sprockets for elongation while measuring diameters of sprockets with vernier calipers. To inspect the parts correctly check the chain tensioner slipper and vibration dampers for wear while inspecting that the oil jet operates smoothly besides No.1 and No.2 chain tensioners. Start with positioning the No.1 cylinder at top dead center and installing the No.4 vibration damper, followed by the No.2 timing chain, balance shaft drive gear and shaft while aligning the timing marks before installing the No.2 crankshaft timing sprocket. Everything necessary for installation includes the No.2 chain tensioner followed by the No.2, No.3 vibration dampers and finally the No.1 timing chain tensioner slipper and No.1 vibration damper. Insert the crankshaft timing sprocket together with the No.1 timing chain before securing them with a cord. Replace the timing chain cover with new gaskets and install the crankshaft pulley after which you should install the oil strainer and oil pan with new packing. Fitting the flywheel housing under cover and dust seal should be followed by 2WD model stiffener plate installation. The implementation order includes crankshaft position sensor along with generator and adjusting bar and bracket and concludes with A/C compressor and its bracket. The final steps include placing the cylinder head assembly and water pump pulley together with the fan equipped with fluid coupling and generator drive belt. Engine oil filling will take place as the technician starts the engine to detect potential leaks. Afterward, the engine under cover installation occurs followed by a vehicle road test to verify normal operation and check for abnormal noises. Inspect both engine coolant and oil reservoirs again.

Remove the timing chain cover by taking out the 2 water bypass pipe nuts, 2 timing chain cover bolts, 9 bolts, and 2 nuts, then loosen the chain cover with a plastic faced hammer and remove it along with 3 gaskets.

Remove the oil strainer, crankshaft pulley (using SST 09213-54015, 09330-00021), and timing chain cover.

Remove the No.2 and No.3 vibration dampers, No.2 chain tensioner, balance shaft drive gear, shaft, No.2 timing chain, and No.2 crankshaft timing sprocket, followed by the No.4 vibration damper.

Install the crankshaft position sensor rotor with the front mark facing forward.