Monday, December 10, 2007
Reinstall the Intake Manifold
Question: Need to know what the torque specs are to reinstall the intake manifold after i replace the knock sensors and the order of torque and maybe a explanation on procedure of takeing the intake manifold off my 2000 Lexus rx300 3.0 Answer: REMOVAL & INSTALLATION Before servicing the vehicle, refer to the precautions in the beginning of this section. Remove or disconnect the following: Wiper and blade assembly Top cowl seal and panel Window washer hoses from the ventilator louvers Left and right ventilator louvers Heater air duct Front upper suspension brace, for RX 300 Properly relieve the fuel system pressure. Remove the battery and battery tray. Drain and recycle the engine coolant. Remove or disconnect the following: Accelerator cable, on automatic transaxles Throttle cable Air cleaner cap assembly Any wiring or hoses interfering with removal Right side engine mount stay Radiator and heater hoses in the way of the intake manifold removal V-bank cover All the vacuum hose and wiring for the emission control valve set Air intake chamber and discard the gasket Exhaust Gas Recirculation (EGR) pipe and discard the gaskets Hydraulic motor pressure hose from the air intake chamber Engine wiring harnesses from the left side, right side, rear and No. 3 timing belt cover Front exhaust pipe, if necessary Timing belt, camshaft timing pulleys, No. 2 idler pulley and No. 3 timing belt cover Cylinder head rear plate 2 bolts, nuts and plate washers with the intake manifold. NOTE: The delivery pipes with injectors will be attached to the manifold. Other fuel related components such as the No. 2 fuel pipe and pulsation damper, if needed Delivery pipes from the intake manifold Clean and inspect the intake manifold mating surfaces. Scrape all old gasket martial off. To Install: Install or connect the following: Delivery pipes with injectors to the intake manifold. NOTE: Be sure to place 4 spacers in position on the manifold. Temporarily install 4 bolts to retain the delivery pipes to the manifold. Inspect the injectors for smooth rotation. Tighten the delivery pipes bolts to 84 inch lbs. (10 Nm), once the injectors are properly seated No. 2 fuel pipe with union bolts and gaskets. Tighten the bolts to 24 ft. lbs. (32 Nm). No. 1 fuel pipe with pulsation damper, using 4 new gaskets. Tighten the damper to 35 ft. lbs. (32 Nm) and the bolt to 11 ft. lbs. (15 Nm). Fuel pressure regulator, if removed Intake manifold. Tighten the 9 bolts and 2 nuts in a crisscross pattern to 11 ft. lbs. (15 Nm). NOTE: Be sure the gasket is in place properly prior to tightening. Retighten the water outlet mounting nuts/bolts to 11 ft. lbs. (15 Nm), if loosened. Install or connect the following: Air assist hose and water inlet pipe, using a new O-ring, by applying a small amount of soapy water. Tighten the fastener(s) to 14 ft. lbs. (20 Nm). Ground strap Vacuum hoses removed to the air intake chamber and vacuum tank Any remaining components, using new gaskets. Tighten the air intake chamber nuts/bolts to 32 ft. lbs. (43 Nm), the EGR pipe nuts to 108 inch lbs. (12 Nm) and the emission control valve set to 69 inch lbs. (8 Nm). Air cleaner assembly Heater hoses Battery and tray Throttle cable with bracket onto the throttle body Accelerator cable, by adjusting it, if equipped with an automatic transaxle Front upper suspension brace, for RX 300. Tighten the nuts to 59 ft. lbs. (80 Nm). Refill the cooling system Install or connect the following: Negative battery cable Heater air duct Left and right ventilator louvers Window washer hoses from the ventilator louvers Top cowl seal and panel Wiper and blade assembly Start the engine and inspect for leaks.