How to remove the cylinder head on 4.3L V6 engine on Chevrolet Avalanche?

For the right cylinder head to be removed one should first drain the cooling system, remove the intake manifold, valve covers, pushrods, and exhaust manifold(s). Thereafter, one should proceed with removing alternator bracket and its mounting stud as well as spark plugs and spark plug wire support brackets. To loosen the cylinder head bolts in a specific pattern and lift the cylinder head(s) off the engine using a block of wood and a hammer. Store the cylinder heads on wood blocks to prevent damage. To remove left side cylinder head follows a similar process but also remove electrical junction block bracket, power steering pump bracket; disconnect ground wire, coolant temperature sensor and more spark plug wire support brackets. When installing the cylinder heads make sure that mating surfaces are clean and free from dirt. Look for any damages and use tap to chase threads inside bolt holes. Position new gaskets over dowel pins then carefully place cylinder heads onto block. Only tighten these nuts following recommended sequence, torque, angle of rotation specifications; thus coat threads of new cylinder head bolts with non-hardening sealant then tighten accordingly. Finally change engine oil and filter (leaks may occur upon starting engine).

Genuine Chevrolet Avalanche Cylinder Head

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7 Cylinder Heads found

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Chevrolet Avalanche Cyl Head Assembly (With Valve)
Part Number: 12629058
$1284.58 MSRP: $2048.32
You Save: $763.74 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: HEAD, Engine Cylinder; Cylinder Head
- Replaced by: 12746921
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2013 Chevrolet Avalanche | 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex
- 2005 Chevrolet Avalanche | 1/2 TON
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Chevrolet Avalanche Cylinder Head Assembly
Part Number: 12581476
$761.70 MSRP: $984.75
You Save: $223.05 (23%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Head Assembly, Cyl ; Head, Engine Cylinder; Cylinder Head
- 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
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Chevrolet Avalanche Head Assembly, Cyl (W/ Vlv)
Part Number: 12711770
$1016.90 MSRP: $1620.46
You Save: $603.56 (38%)
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Product Specifications
- Other Name: Cylinder Head
- Replaces: 12629062, 12629064, 12582713, 12615355
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2009 Chevrolet Avalanche | 1/2 TON | 8 Cyl 6.0L
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Chevrolet Avalanche Engine Cylinder Head
Part Number: 12562319
$473.06 MSRP: $751.05
You Save: $277.99 (38%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Head,Cyl; Cylinder Head
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005 Chevrolet Avalanche | 1/2 TON
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Chevrolet Avalanche Cylinder Head Assembly
Part Number: 12581477
$286.45 MSRP: $368.66
You Save: $82.21 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Head Assembly, Cyl ; Head, Engine Cylinder; Cylinder Head
- 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
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Chevrolet Avalanche Cylinder Head
Part Number: 12578925
$538.50 MSRP: $854.96
You Save: $316.46 (38%)
Product Specifications
- Other Name: Head,Cyl
- Replaces: 12563680, 12559864
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2006 Chevrolet Avalanche | 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex
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Chevrolet Avalanche Cylinder Head Assembly
Part Number: 12685691
Product Specifications
- Other Name: Head Assembly, Cyl; Cylinder Head
- Replaces: 12564335
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005 Chevrolet Avalanche | 1/2 TON

Chevrolet Avalanche Cylinder Head

The Chevrolet Avalanche Cylinder Head is responsible for the engine's breathing, sealing the combustion chambers and letting in the fresh mix and letting out the hot gases. Designed for optimal air flow, the Cylinder Head utilizes well-shaped ports and a solid valve seat that prevents leakage, allowing every cylinder to fire with maximum power. Many versions transitioned from using heavy cast iron to a lighter aluminum, which reduced the weight for improving power to weight balance and allowed the heat to escape quickly. Therefore, they could use higher compression without knocking. Irrespective of the material applied, the Chevrolet Avalanche Cylinder Head must clamp tightly against the block. The design employs torque-to-yield bolts that stretch once, which help to evenly spread the force. This design is to prevent the head gasket from blowing out due to force or heat. If this happens, coolant, oil, or combustion gas could mix. All the internal components of the Cylinder Head, like guides, springs, and valves, can get worn out. This will either cause a misfire or reduced power. Any cracks or warpage in the head will allow leakage of fluids. When in good health, the Chevrolet powerplant in every Avalanche benefits from the unrestricted breathing and dependable sealing of this important Cylinder Head.

Each OEM Chevrolet Avalanche Cylinder Head 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 Cylinder Head Parts Questions & Experts Answers

Cyl Head Assembly (With Valve)
12629058
Q: How to remove the cylinder head on 4.3L V6 engine on Chevrolet Avalanche?
A:
For the right cylinder head to be removed one should first drain the cooling system, remove the Intake Manifold, valve covers, Pushrods, and Exhaust Manifold(s). Thereafter, one should proceed with removing alternator bracket and its mounting stud as well as spark plugs and spark plug wire support brackets. To loosen the cylinder head bolts in a specific pattern and lift the cylinder head(s) off the engine using a block of wood and a hammer. Store the cylinder heads on wood blocks to prevent damage. To remove left side cylinder head follows a similar process but also remove electrical junction block bracket, power steering pump bracket; disconnect ground wire, coolant temperature sensor and more spark plug wire support brackets. When installing the cylinder heads make sure that mating surfaces are clean and free from dirt. Look for any damages and use tap to chase threads inside bolt holes. Position new gaskets over dowel pins then carefully place cylinder heads onto block. Only tighten these nuts following recommended sequence, torque, angle of rotation specifications; thus coat threads of new cylinder head bolts with non-hardening sealant then tighten accordingly. Finally change engine oil and filter (leaks may occur upon starting engine).