Jeep 4693321AD Exhaust Manifold

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The exhaust manifold is located at the right side of the cylinder head for the 207 on the 2014 and earlier models, while it is located at the left side of the cylinder head for the 207 on the 2015 and later models. For the removal of the exhaust manifold, on 2014 and earlier models, it is necessary to raise the car and secure it on jackstands, the exhaust pipe should be disconnected from the manifold with a note that on some models, the exhaust system may have to be removed for clearance purposes. In the next step, take out the heat shield and manifold brace and pull off the connector for oxygen sensor; also unbolt the mounting bolts for the removal of the manifold and the old gasket along with it. For the year 2015 and later, the process starts by the removal of the engine cover and the negative terminal of the battery and the two electrical connectors of the oxygen sensors. Following lifting of the car and the removal of the engine under tray, pull off the Catalytic converter to exhaust manifold nuts and throw away the old gasket. Lower the vehicle and unbolt the heat shield, after that undo the bolts on the manifold while lifting it out of the context of the engine. Check the exhaust manifold for cracks or damages and if it is, replace the part and check the threads of the mounting bolts and replace any that are damaged. Debond all gasket material gently to prevent scratching the surfaces and check for warpage using a straight edge and feeler gauge; more than 0.005 inches warpage needs a replacement of the warpage part or resurfacing. For installation, although there are no recommendations on using new sealant gasket, new gasket should be used without sealant then manifold is installed and bolt should be tightened gradually locating in the center of the manifold first then gradually to the outer most bolt to the required torque before removing the manifold in a reverse order.

To remove the exhaust manifold, first disconnect the negative battery cable from the remote ground terminal. Block the rear wheels, set the parking brake, raise the front of the vehicle, and support it securely on jackstands. Disconnect the downstream oxygen sensor connectors and remove the under-vehicle splash shield if equipped. Unbolt the exhaust pipes at the exhaust manifolds, then lower the vehicle. In the engine compartment, disconnect the oxygen sensor's electrical connector. If removing the rear exhaust manifold, detach the EGR pipe from the top of the manifold; if removing the front manifold, also remove the air filter housing and the engine oil dipstick tube. Remove the exhaust manifold upper heat shield mounting bolts and the heat shields, then detach the manifold from the cylinder head, applying penetrating lubricant to the bolts and threads beforehand. For installation, clean the mating surfaces to eliminate old gasket material and inspect the manifold for distortion and cracks, checking for warpage with a precision straightedge. If necessary, take the manifold to an automotive machine shop for resurfacing. Position the exhaust manifold with a new gasket and lower heat shields, installing the mounting bolts finger tight while ensuring the gaskets are correctly identified by cylinder designation and exhaust port position. Tighten the mounting bolts starting in the middle and working outward in several increments to the specified torque. The remainder of the installation follows the reverse order of removal. Finally, start the engine and check for exhaust leaks between the manifold and cylinder head as well as between the manifold and exhaust pipe.

Position the exhaust manifold with a new gasket and install the mounting bolts finger tight, ensuring the gaskets are identified by the correct cylinder designation and exhaust port position.

Remove the exhaust manifold upper heat shield mounting bolts and the heat shields, then detach the manifold from the cylinder head, applying penetrating lubricant to the bolts and threads beforehand.

On the rear manifold, remove the right front driveaxle, lower the vehicle, and take out the exhaust manifold heat shield mounting bolts/nuts to remove the heat shields.

If removing the rear exhaust manifold, detach the EGR pipe from the top of the manifold. If removing the front manifold, also remove the air filter housing and the engine oil dipstick tube.

Disconnect the electrical connectors from both oxygen sensors.

Remove the heat shield and manifold brace, unplug the oxygen sensor connector, and unscrew the mounting bolts to detach the manifold along with the old gasket.

Position the exhaust manifold with a new gasket and install the mounting bolts finger tight, ensuring the gaskets are identified by the correct cylinder designation and exhaust port position.