Q: How to replace the exhaust manifold on the LLV (2.9L) on Chevrolet Colorado?
A: The first step for Exhaust Manifold replacement on the llv (2.9L) requires exhaust seal elimination. The first step is to remove the exhaust seal then proceed with removing the Exhaust Manifold heat shield followed by the Exhaust Manifold bolts. You can remove the Exhaust Manifold assembly and its attached gasket after disconnecting all the parts listed above. Then dispose of the gasket. You must start by installing a new Exhaust Manifold gasket onto the Cylinder Head before correctly positioning the Exhaust Manifold. Before installing the bolts apply threadlock gm p/n 12345493 (Canadian P/N 10953488) to their threads. To achieve proper fastening of the Exhaust Manifold bolts follow a sequence while tightening them to 20 nm (15 lb ft) three times. Reattach both the exhaust seal along with the Exhaust Manifold heat shield.
Q: How to replace the right exhaust manifold on a 3.5L engine on Chevrolet Malibu?
A: A replacement of the right Exhaust Manifold for a 3.5l engine requires the heated Oxygen Sensor socket (J 39194-B) as part of the required tools. First detach the generator and disconnect the heated Oxygen Sensor (HO2S) electrical connector after removing the connector position assurance (CPA) retainer without damaging the attached pigtail. You should employ the heated Oxygen Sensor socket (J 39194-B) to achieve ho2s removal. The workflow proceeds with a three-step removal process of exhaust gas recirculation (EGR) pipe bolts that is followed by a controlled pipe relocation. Start by taking out the spark plugs and then remove the Exhaust Manifold nuts followed by the rear Catalytic Converter before extracting the Exhaust Manifold from its position. The Exhaust Manifold will require a new gasket applied to the cylinder head studs before returning the manifold to its position. First install the Exhaust Manifold nuts while torqueing them to 16 nm (12 ft. Lbs.) before reinstallation of the rear Catalytic Converter along with the spark plugs. Position the egr pipe according to needs before securing the three egr pipe bolts with a torque of 10 nm (89 inch lbs.). The Oxygen Sensor threads should receive nickel-based anti-seize compound equivalent to gm p/n 5613695 before installation through the heated Oxygen Sensor socket (J 39194-B) until the torque reaches 42 nm (31 ft. Lbs.). The ho2s electrical connector needs to be reconnected before installing the generator with its cpa retainer and securing the connector rosebud to its bracket.
Q: How to replace the right side exhaust manifold on Chevrolet Tahoe?
A: The first step for replacing right side Exhaust Manifold requires removal of the heated Oxygen Sensor (HO2S). The vehicle requires complete support through proper lifting. The first step is to remove nuts that hold the Catalytic Converter to the Exhaust Manifold (1500 series is displayed but the procedure for 2500 series is comparable). Play the front wheel house liner from the right side before lowering the vehicle partially to access the wheel opening. Twisting each Spark Plug wire boot half an inch should allow you to pull out the boot so you can access the Spark Plug. To service ignition coils you should disconnect their Spark Plug Wires in a specific method. First remove the engine block oil level indicator tube then proceed with Exhaust Manifold bolt removal and Exhaust Manifold separation. The entire Exhaust Manifold Gasket along with its sealing component needs to be thrown away. To replace the Exhaust Manifold it is necessary to disassemble the heat shield by removing its bolts and releasing it from position. Before attaching the Exhaust Manifold heat shield install it in position then tighten the bolts to 9 nm (80 lb in). Apply threadlock gm p/n 12345493 (Canadian P/N 10953488) to the Exhaust Manifold bolts as a 5 mm (0.2 in) thick strip around the threads after cleaning their surface. At first install a new Catalytic Converter seal while positioning the new Exhaust Manifold Gasket and Exhaust Manifold to the Cylinder Head with attention to seating the Catalytic Converter seal. Install the center Exhaust Manifold bolts with 15 nm torque before working from side to side then finish them at 20 nm. The gasket tab needs to be folded with a flat punch at the Cylinder Head edge. The technician should reinstall the oil level indicator tube while carefully positioning Spark Plug Wires and ignition coils into their connectors through sideward pushing for proper seating verification of each connector boot. Raise and support the vehicle to its full height before installing the Catalytic Converter to Exhaust Manifold nuts which should be tightened up to 50 nm (37 lb ft). The procedure includes lowering the vehicle to access the wheel opening then reinstalling the right-front front wheel house liner before completing the installation with the ho2s and exhaust leak inspection.