OEM 2008 Toyota 4Runner Knock Sensor

2008 Toyota 4Runner Knock Sensor Parts Q&A

• Q: How to install the knock sensors and the intake manifold on 2008 Toyota 4Runner?

  A: The installation procedure begins by using 2 nuts to install and torque the 2 knock sensors to 20 Nm (204 kgf-cm, 15 ft-lbf) and by connecting their corresponding connectors. You should install the air pump assembly with bracket. The intake manifold installation process requires you to place two new gaskets on it before setting it on the cylinder heads and following multiple installation steps to achieve 18 Nm (185 kgf-cm, 13 ft-lbf) torque for all 6 bolts and 4 nuts. Attach the V-bank cover bracket and wire bracket to the intake manifold while torque should be set at 7.5 Nm (76 kgf-cm, 66 in-lbf). The engine wire installation requires securing it to the engine hanger and wire bracket before applying a wire protector bolt and nut to the intake manifold and cylinder heads along with installing both ground cables through the RH and LH cylinder heads using bolts. The water by-pass hoses need connection to throttle body while the wire clamp attachments should occur at the wire clamp bracket found on the RH delivery pipe. The vacuum hoses from the intake manifold require connection of the vacuum hose [A] to the fuel pressure regulator and the PCV hose [B] to the PCV valve on the LH cylinder head and the EVAP hose [C] from the charcoal canister to the purge VSV and the 2 vacuum hoses [D] to the VSV for the air injection system. Hook up the throttle control connector with all the necessary connectors which include the purge VSV along with 8 injectors and 8 ignition coils and the air fuel ratio sensors and ECT sensor and the two VSV for air injection system connectors. Position the fuel hose No. 2 together with the fuel hose. The installation requires tightening the throttle body cover sub-assembly to a torque value of 7.5 Nm (80 kgf-cm, 66 in-lbf). Check for fuel leakages in addition to inspecting engine coolant leaks while also performing an engine coolant addition.