The Lexus RX300, RX330, and RX350 disassembly manual says professionals with specialized knowledge should handle the timing system of these models because it's tricky. The supplier says to take out the entire engine and transmission first. Put the engine and transmission in place first, then take off the belt system along with its tensioner. Eliminate the idler pulleys after that. When the engine is at TDC, take off the crankshaft pulley following recommended tools to prevent damage. Begin by taking off the valve covers, followed by unique parts that vary between 2GR-FE and 2GR-FKS engine models: timing chain cover bolts and
Oil Cooler assembly. 2GR-FKS engines need bolts removed from water intake and outlet, engine mount bracket, and camshaft timing control solenoids before work can begin. When the timing chain cover is taken off, balance digging out the old
Crankshaft Seal while keeping track where the securing bolts were placed. Be sure the No. 1 cylinder piston is close to the top of the cycle (TDC), and rotate the crankshaft until it is. Squeeze the No. 1 chain tensioner shut, take away the slippers for chain control 1, loosen the vibration dampers, and remember how the camshaft spinners line up before you take off the chain in position 1. For engines with 2GR-FKS, turn the crankshaft until the chain slips loose. Remove it, then take off both the idler sprocket shaft and the crankshaft timing chain sprocket. Unwind and remove tensioner No. 2, then take out the tensioner for No. 3 chain. Check all timing chain pieces for wear and tearing, measure tightness, measure sprocket sizes, and see how much oil dirt comes out. Ensure correct operation of the chain tensioners. To install timing chains, first check fuel injection harness and crankshaft turning resistance, lock the chain tensioner plunger, match timing marks by aligning yellow links, and fasten all parts as prescribed. Wipe off any dirt from the parts, add a new oil seal for the crankshaft, put on the oil sealant, and attach the timing chain cover right away. Clean the gasket areas, install new oil seals before installing your
Oil Pans, following engine model requirements. Finish by undoing the steps in the reverse order when you complete the installation. Finish the repair by adding oil and coolant, connecting the battery again, and turn on the car to make sure there are no fluid drips.