Astro Van M V6-262 4.3L VIN B TBI (1991)
Oxygen Sensor: Service and Repair
The following procedure should be performed with engine temperature over 120~ F otherwise the oxygen sensor may be difficult to remove.
1.
Disconnect battery ground cable.
2.
Disconnect oxygen sensor electrical connector, then carefully loosen oxygen sensor and remove.
3.
Reverse procedure to install. See MECHANICAL SPECIFICATIONS for torque value. Replacement oxygen sensors should have a special
anti-seize compound applied to threads. If replacement sensor is lacking anti-seize compound or original sensor is to be re-installed, coat threads
with suitable anti-seize compound.
