How to Replace the Intake/Exhaust Manifold in a Toyota Corol

Pull the negative battery cable from the terminal. Raise the vehicle on jack stands and make sure it is securely supported.

Located the gravel shield on the underside of the engine and remove it. Remove the support bracket for the downpipe.

Loosen the bolts from the exhaust flange and then remove them. Pull the downpipe from the manifold.

Remove the manifold bolts in two or three passes. Start at the center of either side and work out, using a criss-cross pattern. Lift the manifold out.

Clean any gasket material and debris from the mating surface. Use compressed air and solvent. Inspect the surface for any damage.

Install a new gasket. Set the exhaust manifold in place.

Tighten the bolts using the correct torque (see Tips). Tighten the bolts in sequence, starting at the center and working out in a criss-cross pattern, making three passes.

Replace the downpipe. Set the exhaust flange in position and tighten the bolts. Replace the gravel shield.

Reconnect the negative battery cable. Start the engine and check for exhaust leaks. Turn off the engine and lower the vehicle from the jack stands.