GM 12571100
Exhaust Manifold

The replacement process for left side Exhaust Manifold starts with heat shield removal followed by oil indicator and Catalytic Converter removal. The Exhaust Manifold bolts need removal before extracting the Exhaust Manifold and its gasket which is discarded as it should not be reused. Users should disconnect the heated Oxygen Sensor that is connected to the Exhaust Manifold. For smooth future removal of the old sensor the threads require application of anti-seize compound gm p/n 12377953 or its equivalent. The ho2s sensor requires installation onto the Exhaust Manifold with 42 nm (31 lb ft) torque. First attach one Exhaust Manifold bolt to the Exhaust Manifold before placing a new Exhaust Manifold Gasket on top of the Exhaust Manifold and fastening the bolt. Begin by positioning both the Exhaust Manifold with its gasket to the Cylinder Head and the Catalytic Converter and complete all bolt installation before tightening them to 20 nm (15 lb ft). The repair ends with installation of the Exhaust Manifold heat shield followed by the oil level indicator and then the Catalytic Converter.

The process to change the left side Exhaust Manifold begins by removing the Exhaust Manifold heat shield before uninstalling the oil level indicator followed by disconnection of the Catalytic Converter. As a next step remove the Exhaust Manifold bolts before discarding the gasket because reuse is prohibited. The heated Oxygen Sensor needs removing from the Exhaust Manifold position. As a replacement step for the old sensor use gm p/n 12377953 anti-seize compound or its equivalent to coat threads. Fasten the ho2s to the Exhaust Manifold at 42 n.m (31 lb ft). Install the first bolt to the Exhaust Manifold while simultaneously setting down the new Exhaust Manifold Gasket onto the manifold for bolt attachment. After placing the Exhaust Manifold (with installed gasket) to the Cylinder Head and the Catalytic Converter position the remaining Exhaust Manifold bolts while applying torque to 20 n.m (15 lb ft). The repair requires reinstallation of the Catalytic Converter followed by the oil level indicator then the Exhaust Manifold heat shield.

The replacement process of the left side Exhaust Manifold begins by uninstalling the Exhaust Manifold heat shield along with the oil level indicator. The procedure starts by removing Exhaust Manifold nuts that connect the Catalytic Converter along with the Exhaust Manifold bolts. The gasket must be discarded since it will not be used again after the Exhaust Manifold removal. First install one Exhaust Manifold bolt onto the Exhaust Manifold followed by positioning the new Exhaust Manifold gasket on the Exhaust Manifold and the bolt. Follow the fastener notice while connecting the Exhaust Manifold with gasket between the Cylinder Head and the Catalytic Converter. Fasten the remaining Exhaust Manifold bolts while tightening them to 20 n.m (15 lb ft). Attach the Catalytic Converter with a torque of 50 n.m (37 lb ft) to the Exhaust Manifold nuts. To complete the work you should place back the oil level indicator and the Exhaust Manifold heat shield.

One must begin Exhaust Manifold replacement by removing the Catalytic Converter along with the Exhaust Manifold heat shield. The bolts must be taken out from the Exhaust Manifold before it and its gasket can be removed together. The gasket needs to be discarded because reuse is not advised. The installation process starts by mounting one Exhaust Manifold bolt onto the Exhaust Manifold before you set a new Exhaust Manifold gasket on the Cylinder Head for bolting. Secure both Catalytic Converter and Cylinder Head with the Exhaust Manifold and its gasket while applying 20 nm (15 lb ft) torque to Exhaust Manifold bolts. The final steps involve replacing both the Exhaust Manifold heat shield and Catalytic Converter into their original positions.

The procedure to replace the left side Exhaust Manifold starts by removing two components: Exhaust Manifold heat shield followed by oil level indicator and Catalytic Converter. Disassemble the Exhaust Manifold bolts without gasket reuse before proceeding to extract the Exhaust Manifold component along with the gasket which needs discarding. The heated Oxygen Sensor should be detached from the Exhaust Manifold. The threads of reused sensors require coating with gm p/n 12377953 anti-seize compound or equivalent product. Fasten the ho2s onto the Exhaust Manifold by tightening it to 42 nm (31 lb ft). You should install one Exhaust Manifold bolt to its respective slot on the Exhaust Manifold before setting the new Exhaust Manifold Gasket to the manifold and bolting it into place. Install the Exhaust Manifold with gasket on the Cylinder Head while also connecting the Catalytic Converter before torquing all Exhaust Manifold bolts to 20 nm (15 lb ft). Begin with Catalytic Converter installation followed by the oil level indicator then install the Exhaust Manifold heat shield.

The first step to replace the right side Exhaust Manifold requires the removal of the Catalytic Converter together with the Exhaust Manifold heat shield. After removing the Exhaust Manifold bolts other gaskets should be discarded. Extract both Exhaust Manifold along with its gasket for disposal from the automobile. First install one Exhaust Manifold bolt onto the Exhaust Manifold before setting a new Exhaust Manifold gasket on the Cylinder Head and bolting it in. Secure the Exhaust Manifold (together with its gasket) onto both the Catalytic Converter and the Cylinder Head while following the specified fastener instructions. Mount the Exhaust Manifold bolts starting with one component 20 n.m (15 lb ft) fastening torque. The conclusion of the replacement procedure requires reinstallation of the Exhaust Manifold heat shield together with the Catalytic Converter.

Reinstall the exhaust manifold heat shield and finally the catalytic converter.

Begin by securing one exhaust manifold bolt to the exhaust manifold.

Take off the HO2S electrical connector rosebud clip from the thermostat housing and remove the HO2S.

Remove the exhaust manifold heat shield bolts and the heat shield.

Reinstall the catalytic converter to the exhaust manifold and secure with the nuts.

Tighten it to 58 Nm (43 lb ft).