Depending on what year and what Engine you hog in your GMC Sonoma Testament dictate the flat of puzzle and the type of catalytic converter you want for replacement. Before the year 2000, the converter was connected to the exhaust manner latest the front exhaust main in the accepted 4.3 litre engine. In the year 2000, the catalytic converter became the front exhaust drainpipe which is all the more extra challenging and exhausting to remove and change.
Instructions
Install a Catalytic Converter in a GMC Sonoma
For the Y-pipe with three sensors, dash off decided to assign the exactly sensor into the correctly Harbour. Be careful not to overtighten to prevent stripping gone the threads of the sensor(s).4. Glowing the torch with the striker and heat up one aficionado on the manifold stud at a age (for the front Y-pipe converter). Situate on the safety glasses.
2. Place and remove the O2 sensors. In the front Y-pipe converter operate, there Testament be three O2 sensors. In the older clement of Sonoma, there is particular one O2 sensor. Set the plugs for the wire and unplug them using the flathead screwdriver to press in on the clip lock. Employ the ratchet and O2 sensor socket to remove the sensors. Provided essential be, you may own to heat the tube up a fleeting with the torch to extract them. Remit them to algid down whether you needed the torch.
3. Screw the O2 sensor(s) into the late converter, however handle a luminous coat of anti-seize lubricant on the threads ahead.1. Lift the GMC Sonoma all the up on the vehivle lift. Load all the tools and the dewy converter into the factor cart/tray and rotate it over near you under the Sonoma, on the contrary elsewhere of your course.
When the stone is cherry copper, apartment the pneumatic gun, extension, swivel and socket onto it and remove the nut. If the converter is connected to the front pipe, cut the three nuts and bolts with the torch on both sides of the flange, then use the hammer and punch to knock remainder of the bolt out of the flange connection.
5. Cut the two or three nuts and bolts out of the rear flange connection on the converter using the torch. Cut the bolt on both sides of the flange and knock remainder of the bolt from the flange connection using the hammer and a punch. Be careful on the last bolt as the converter will separate from the exhaust system. Put on the gloves and remove the old converter.
6. Install the new catalytic converter starting with the inlet first (closest to the motor). Install the gasket(s) first and then thread on new manifold stud bolts for the Y-pipe converter or replace the nuts and bolts on the converter connected to the front pipe. Use a bolt head and washer on one side and a lock washer and nut on the other side of the flange.
7. Tighten the nuts on the manifold with the gun or tighten the nuts and bolts on the flange connection, using the gun on one side and holding the bolt steady with a hand wrench on the other.
8. Replace the gasket and hardware on the rear connection of the catalytic converter. Place the bolt head and flat washer on one side and the lock washer and nut on the other side of the flange connection. Tighten with the gun on the nut side and hold the bolt head with a hand wrench.
9. Plug the oxygen sensor wire(s) back into the plug(s).
10. Remove the tool cart and any other debris from under the Sonoma, lower the truck and start the engine up. Raise it back up and check for any possible exhaust leaks coming from the manifold, flange or oxygen sensor connections. Tighten as needed.
