GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
1998
🢒
GMC P42 Commercial Chassis
🢒
Engine
🢒
Engine Cooling
🢒 Exhaust Manifold Replacement
Exhaust Manifold Replacement Left Side
Removal Procedure
Remove the exhaust pipe from the exhaust manifold. Refer to
Exhaust Pipe Replacement
in Engine Exhaust.
Disconnect the oxygen sensor electrical connector.
Disconnect the EGR valve pipe from the exhaust manifold.
Remove the exhaust manifold bolts.
Remove the exhaust manifold. Refer to
Exhaust Manifold Removal (Left)
.
Clean all sealing surfaces. Refer to
Exhaust Manifold Clean and Inspect
.
Installation Procedure
Install the exhaust manifold. Refer to
Exhaust Manifold Installation (Right)
.
Connect the EGR valve pipe to the exhaust manifold.
Tighten
Tighten the EGR valve pipe nut to 30 N·m (22 lb ft).
Install the exhaust pipe to the exhaust manifold. Refer to
Exhaust Pipe Replacement
in Engine Exhaust.
Connect the oxygen sensor electrical connector.
Exhaust Manifold Replacement Right Side
Removal Procedure
Remove the exhaust pipe from the exhaust manifold. Refer to
Exhaust Pipe Replacement
in Engine Exhaust.
Disconnect the oxygen sensor electrical connector.
Remove the bolt for the oil level indicator tube.
Remove the exhaust manifold bolts.
Remove the exhaust manifold. Refer to
Exhaust Manifold Removal (Right)
.
Clean all sealing surfaces. Refer to
Exhaust Manifold Clean and Inspect
.
Installation Procedure
Install the exhaust manifold. Refer to
Exhaust Manifold Installation (Right)
.
Install the oil level indicator tube. Refer to
Oil Level Indicator and Tube Installation
.
Install the exhaust pipe to the exhaust manifold. Refer to
Exhaust Pipe Replacement
in Engine Exhaust.
Connect the oxygen sensor electrical connector.