Toyota 13540-0H010
Tensioner Assembly, Chain

Before servicing the timing chain tensioner start with oil drain and the removal of the RH engine under cover and all other listed components in sequence along with both PCV hoses detachments then 8 bolts and 2 nuts removal. First, set No. 1 cylinder to TDC/compression by adjusting the crankshaft pulley alignment to timing mark 0 then check both camshaft and VVT timing sprocket marks; if misalignment occurs adjust the crankshaft by one revolution for accuracy. You will need Special Service Tools 09213-54015 and 09330-00021 to detach the crankshaft pulley which leads to the removal of the chain tensioner and drive belt tensioner along with the crankshaft position sensor and oil pan and timing chain cover without causing damage to any contact areas. Starting at the crank angle sensor plate move to remove the chain tensioner slipper and chain vibration damper alongside the timing chain guide, timing chain, crankshaft timing sprocket, camshaft timing sprocket, and VVT timing sprocket followed by avoiding the disassembly of the VVT timing sprocket. The inspection includes checking timing chain elongation and sprocket wear levels so replacement is required when measurements exceed 1.0 mm. Also inspect chain tensioner slipper and vibration damper wear levels, and replace when above 1.0 mm. The installation of a crankshaft front oil seal requires tool 09309-37010 when the timing chain cover is taken off but uses tool 09308-10010 if the cover stays in place. Start installation by fitting the camshaft timing sprocket and VVT timing sprocket while maintaining ideal alignment and torque as per specifications followed by recurring the No. 1 cylinder to its TDC/compression position. During installation install the chain vibration damper with crankshaft timing sprocket and timing chain and timing chain guide as well as chain tensioner slipper and crank angle sensor plate and timing chain cover. Seal packing (Part No. 08826-00080) should be used properly alongside the tightening of all bolts and nuts to specified torque values. Secure the drive belt tensioner along with crankshaft position sensor and oil pan and crankshaft pulley by using Special Service Tools: 09213-54015, 09330-00021 according to torque specifications. Begin by installing the chain tensioner before setting chain tension and verifying valve timing then start the installation process by returning the cylinder head cover, ignition coils, vane pump, generator and all remaining components that include the RH engine mounting insulator, drive belt, ABS actuator, air cleaner assembly, and engine under cover. Complete the task by filling the engine with oil, starting the initial engine operation and leak detection followed by a second check of engine oil level.

The service process for the Timing Chain Tensioner starts with engine oil drainage before removing sequential components like RH engine under cover, PS vane pump, ABS actuator, RH engine mounting insulator and drive belt, generator, air cleaner assembly, and ignition coils. You must disconnect the two PCV hoses then remove eight bolts along with two nuts to extract the cylinder head cover. Start by placing No. 1 cylinder at TDC position by spinning the crankshaft pulley until the groove lines up with timestamp 0 as well as when the camshaft and VVT timing sprocket timing marks align with their bearing caps; make a single crankshaft rotation if alignment requires it. You can remove the pulley bolt and crankshaft pulley by utilizing SST 09213-54015, 09330-00021 and SST 09950-50013 as needed. A proper procedure includes taking off 2 nuts and the chain tensioner along with its gasket followed by the drive belt tensioner then the crankshaft position sensor and the oil pan along with the timing chain cover which requires disassembling the stud bolt for drive belt tensioner and removing 14 bolts and 2 nuts while prying the cover off with care. Before proceeding with the replacement separate the crank angle sensor plate from the chain tensioner slipper and the chain vibration damper and timing chain guide then remove the timing chain cranks shaft timing sprocket and camshaft timing sprocket and VVT timing sprocket but avoid damaging the cylinder head and valve lifter. Changes in the timing chain length and sprocket structural integrity need replacement. The chain tensioner slipper and vibration damper need replacement if wear exceeds 1.0 mm. The installation of new timing chain cover oil seal requires SST 09309-37010 for tapping both removal and installation unless it's under cover; in that case use SST 09308-10010 and 09950-60010 to retrieve and implement the seal. Proper alignment followed by correct torque values leads to the installation of camshaft timing sprocket and VVT timing sprocket before resetting No. 1 cylinder to TDC/compression. You should install the chain vibration damper and crankshaft timing sprocket followed by putting on the timing chain while maintaining proper mark alignment. Then install the timing chain guide as well as the chain tensioner slipper to the cylinder block stopper while ensuring the slipper remains in position. Install the crank angle sensor plate together with the timing chain cover which includes seal packing (Part No. 08826-00080), secure bolts and nuts with their specified torques. The installation process includes placing the drive belt tensioner followed by the crankshaft position sensor then the oil pan after which the crankshaft pulley and chain tensioner are installed by maintaining proper torque along with correct alignment. The last step includes checking valve timing before installing the cylinder head cover with its new gasket while reattaching all components before filling with engine oil and starting the engine for leak inspection and subsequent oil level check.