OEM 2010 Toyota Yaris Camshaft

2010 Toyota Yaris Camshaft Parts Q&A

• Q: How to remove the camshaft on 2010 Toyota Yaris?

  A: The first step for camshaft removal from the 1NZ-FE engine includes disconnection of the negative battery cable then removal of the engine under cover RH. Begin by removing first cylinder head cover No. 2 and ignition coil No. 1 while you disconnect both ventilation hoses from the components. The sub-assembly of cylinder head cover requires removal first then proceed to discard fan & generator V belt additionally remove engine mounting insulator sub-assembly RH. The next step involves removing No. 2 camshaft after carefully rotating the crankshaft damper counterclockwise 40 degrees from TDC while aligning its timing notch with the matchmark of the timing chain cover. This step prevents piston-valve contact. Set No. 1 piston to TDC compression by rotating the crankshaft using the damper to align its timing mark with "0" on the oil pump while ensuring that both timing sprocket and gear marks face upward. A one-time revolution of the crankshaft query should validate the mark alignment. Use a wrench with an 8 mm hexagon to unscrew the screw plug after marking the chain at its timing positions. The service hole of the chain tensioner requires a screwdriver for pulling the stopper plate upwards which enables camshaft No. 2 rotation clockwise for plunger insertion. The stopper plate needs its service hole aligning with the opening while inserting a 3 mm (0.12 in.) diameter bar to anchor the plate by fixing it with tape. Use a wrench to remove the flange bolt from the hexagonal lobe of camshaft No. 2 while performing uniform bolt loosening and extraction of the 11 bearing cap bolts in correct sequence before removing camshaft bearing caps No. 1 and No. 2. First remove the flange bolt with camshaft timing sprocket before extracting camshaft No. 2. The procedure requires holding the chain by hand to remove the remaining camshaft along with its camshaft timing gear assembly by using string for chain tying. Secure the camshaft in a vise while protecting its 4 oil paths with tape and puncturing the tape on advance and retard paths. Use air pressure at 150 kPa (1.5 kgf cm2) to verify that the camshaft timing gear assembly turns into its advance position through revolving motion after reducing pressure on the timing retard path. The user should start by stopping air pressure to the timing retard side path and then proceed with the timing advance side path to maintain proper shifting of the lock pin without abrupt movement. End the process by taking out the flange bolt along with the camshaft timing gear assembly, maintaining the integrity of all other 4 bolts yet only remove the lock pin if you will reuse the gear.