How to remove and reinstall exhaust manifolds on 4.3L V6 engine on Chevrolet Avalanche?

Disconnect the cable from the negative terminal of the battery. Raise the vehicle and support it securely on jackstands. Working under the vehicle, apply penetrating oil to the exhaust pipe-to-manifold studs and nuts, which are usually rusty. Remove the nuts retaining the exhaust pipe(s) to the manifold(s). Disconnect the spark plug wires, remove them from their retainers and lay them out of the way. Remove the exhaust manifold fasteners. Remove the manifolds along with the heat shields and discard the gaskets. The heat shields can be removed at this time. Check the manifold for cracks and ensure the bolt threads are clean and undamaged. The manifold and cylinder head mating surfaces must be clean before the manifolds are reinstalled-use a gasket scraper to remove all carbon deposits. Position the manifold on a bench and install the heat shields, bolts, and gaskets onto the manifold. Retaining tabs surrounding the gasket bolt holes will hold the assembly together as the manifold is installed. Place the manifold on the cylinder head and install the mounting bolts finger-tight. When tightening the mounting bolts, work from the center to the ends, and use a torque wrench. Tighten the bolts in two steps to the torque specifications. If equipped, bend the locking tabs back against the bolt heads. The remainder of installation is the reverse of removal. Start the engine and check for exhaust leaks.

Genuine Chevrolet Avalanche Exhaust Manifold

Engine Exhaust Manifold

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8 Exhaust Manifolds found

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Chevrolet Avalanche Engine Exhaust Manifold
Part Number: 12616285
$131.11 MSRP: $224.19
You Save: $93.08 (42%)
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Product Specifications
- Other Name: Manifold,Exhaust ; Manifold, Engine Exhaust Manifold; Exhaust Manifold, Manifold
- Replaces: 12602037, 12562235, 12571678, 12564155
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2013 Chevrolet Avalanche | 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
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Chevrolet Avalanche Engine Exhaust Manifold
Part Number: 12616286
$205.82 MSRP: $351.92
You Save: $146.10 (42%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold,Exhaust; Exhaust Manifold
- Replaces: 12602038, 12578341
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2013 Chevrolet Avalanche | 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
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Chevrolet Avalanche Engine Exhaust Manifold Assembly
Part Number: 12605246
Product Specifications
- Other Name: Manifold Assembly, Exhaust ; Manifold, Engine Exhaust Manifold; Exhaust Manifold, Manifold
- Replaces: 12562236, 12564157
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002 Chevrolet Avalanche | 1/2 TON | 8 Cyl 5.3L
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Chevrolet Avalanche Engine Exhaust Manifold (Machining) (W/ A.I.R)
Part Number: 12555621
Product Specifications
- Other Name: Manifold, Exhaust (Machining) (W/ A.I.R) ; Manifold, Engine Exhaust Manifold; Exhaust Manifold, Manifold
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002 Chevrolet Avalanche | 3/4 TON | 8 Cyl 8.1L
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Chevrolet Avalanche Engine Exhaust Manifold (Machining)
Part Number: 12555620
Product Specifications
- Other Name: Manifold, Exhaust (Machining) ; Manifold, Engine Exhaust Manifold
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002 Chevrolet Avalanche | 3/4 TON | 8 Cyl 8.1L
View related parts
Chevrolet Avalanche Engine Exhaust Manifold
Part Number: 12601751
Product Specifications
- Other Name: Manifold, Exhaust ; Manifold, Engine Exhaust Manifold; Exhaust Manifold, Manifold
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2006 Chevrolet Avalanche | 3/4 TON | 8 Cyl 8.1L
View related parts
Chevrolet Avalanche Engine Exhaust Manifold (Machining)
Part Number: 12557286
Product Specifications
- Other Name: Manifold, Exhaust (Machining) ; Manifold, Engine Exhaust Manifold; Exhaust Manifold, Manifold
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2003 Chevrolet Avalanche | 3/4 TON | 8 Cyl 8.1L
View related parts
Chevrolet Avalanche Engine Exhaust Manifold (Machining) (W/O ut Air Injector Reactor)
Part Number: 12557287
Product Specifications
- Other Name: Manifold, Exhaust (Machining)(W/Out Air Injector Reactor) ; Manifold, Engine Exhaust Manifold; Exhaust Manifold, Manifold
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2006 Chevrolet Avalanche | 3/4 TON | 8 Cyl 8.1L

Chevrolet Avalanche Exhaust Manifold

The Exhaust Manifold in Chevrolet Avalanche automobiles specifically entails the duty of routing hot exhaust fumes coming from the car's engine to the exhaust system and thus the environment as a whole leading to optimum engine efficiency and minimization of toxic emissions. Located at various positions based on the layout of the engines it is made from cast iron or stainless steel and consists of multiple tubes which are designated by the number of cylinders of the engine. There has been the standard manifold as well as the headers used over the years to improve the performance of the engine. In contrast with standard manifolds which mandate the collection of exhaust gases, headers are employed primarily to decrease flow resistance and consequently boost exhaust gas velocity. Non-significant changes like casting finishes and the use of ceramic coatings and exhaust wraps can improve performance to some extent, but such changes are also likely to result in early failure of the manifold. In conclusion, the location, design and the state of the exhaust manifold greatly determines the capacity and safety of the vehicle.

Each OEM Chevrolet Avalanche Exhaust Manifold we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Chevrolet Avalanche Exhaust Manifold Parts Questions & Experts Answers

Engine Exhaust Manifold
12616286
Q: How to remove and reinstall exhaust manifolds on 4.3L V6 engine on Chevrolet Avalanche?
A:
Disconnect the cable from the negative terminal of the battery. Raise the vehicle and support it securely on jackstands. Working under the vehicle, apply penetrating oil to the exhaust pipe-to-manifold studs and nuts, which are usually rusty. Remove the nuts retaining the exhaust pipe(s) to the manifold(s). Disconnect the spark plug wires, remove them from their retainers and lay them out of the way. Remove the exhaust manifold fasteners. Remove the manifolds along with the heat shields and discard the gaskets. The heat shields can be removed at this time. Check the manifold for cracks and ensure the bolt threads are clean and undamaged. The manifold and Cylinder Head mating surfaces must be clean before the manifolds are reinstalled-use a gasket scraper to remove all carbon deposits. Position the manifold on a bench and install the heat shields, bolts, and gaskets onto the manifold. Retaining tabs surrounding the gasket bolt holes will hold the assembly together as the manifold is installed. Place the manifold on the cylinder head and install the mounting bolts finger-tight. When tightening the mounting bolts, work from the center to the ends, and use a torque wrench. Tighten the bolts in two steps to the torque specifications. If equipped, bend the locking tabs back against the bolt heads. The remainder of installation is the reverse of removal. Start the engine and check for exhaust leaks.