Exhaust Manifold Replacement L61
Removal Procedure
- Remove the exhaust manifold heat shield.
- Remove the oxygen sensor. Refer to
Heated Oxygen Sensor 1 Replacement
in Engine Controls - 2.2L
(L61).
- Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle
in General Information.
Notice: Do not bend the exhaust flex decoupler more than 3 degrees in
any direction. Movement of more than 3 degrees will damage the exhaust
flex decoupler.
- Remove the pipe to manifold nuts.
- Pull down and back on the exhaust pipe in order to disengage the pipe
from the exhaust manifold.
- Lower the vehicle.
- Remove the exhaust manifold to cylinder
head nuts.
- Remove the exhaust manifold.
- Clean all the sealing surfaces.
Installation Procedure
- Install a new exhaust manifold gasket.
- Install the exhaust manifold to the cylinder head.
Notice: Refer to Fastener Notice in the Preface section.
Important: Install the new exhaust nuts.
- Install the new exhaust manifold to cylinder head retaining nuts. Follow the
tightening sequence.
Tighten
Tighten the nuts to 13 N·m (115 lb in).
- Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle
in General Information.
- Install a new exhaust manifold to flex coupler
gasket .
- Push the flex coupler into position on the exhaust manifold.
Important: Install the new exhaust nuts.
- Install the retaining nuts which secure the manifold to the flex decoupler .
Tighten
Tighten the nuts to 50 N·m (37 lb ft).
- Lower the vehicle.
- Install the oxygen sensor. Refer to
Heated Oxygen Sensor 1 Replacement
in Engine Controls - 2.2L
(L61).
- Install the exhaust manifold heat shield.
Tighten
Tighten the bolts to 25 N·m (18 lb ft).