How do you replace the cylinder heads?

Start by detaching the negative battery cable and relieving the fuel system pressure in order to change the cylinder heads. After that, empty out the cooling system and remove the engine/transaxle assembly. From there, take off the intake manifold(s), valve covers, and upper timing chains. Based on which head is being removed, ground wires should be disconnected from heads as well as different connectors and hoses. The head bolts must be slightly unscrewed following a particular order thereafter removed by hand while their lengths and positions are noted down. It is important to carefully lift these parts from above this machine avoiding prying them away since they should then be standing on wooden blocks. For installation, ensure mating surfaces on both cylinder heads and block are clean; use gasket removal solvents when necessary. Thoroughly clean up all surfaces in order to prevent oil-related sealing problems as well as clear debris from the cylinders. Inspect these areas for damage and fix it where necessary also chase threads with brake cleaner or clean thread holes in head bolt holes to produce right torque readings. Put new gaskets over dowels in block; then put these heads back without moving gaskets very much. Use thread locking compound to cover threads for new 8 mm head bolt(s). Then tighten these new 11 mm head bolts according to torque specifications followed by angle of rotation specified sequence having previously installed them finger-tight onto these newly coated threads with this substance named thread lockers. To complete reassembly follow this dismantling process backwards including installing again engine/transaxle assembly, replacing engine oil filter also refilling coolant however lubricant compartment respectively at last begin its startup operation before inspecting water or oil leakages if any present within that mechanism's working system.

Genuine GMC Acadia Cylinder Head

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9 Cylinder Heads found

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GMC Acadia Cylinder Head Kit
Part Number: 12645526
$860.18 MSRP: $1110.03
You Save: $249.85 (23%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Head Kit,Cyl; Cylinder Head
- Replaces: 12634225, 12645528
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2017 GMC Acadia | SPORT UTILITY VEHICLE 2WD, SPORT UTILITY VEHICLE 4WD, SPORT UTILITY VEHICLE AWD | 6 Cyl 3.6L
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GMC Acadia Head Assembly,Cyl (Remanufacture) 2008, 2010 Llt Lh
Part Number: 19329667
$693.54 MSRP: $1098.62
You Save: $405.08 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Head Assembly,Cyl (Reman) 2008, 2010 Llt Lh
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2011 GMC Acadia | SPORT UTILITY VEHICLE 2WD, SPORT UTILITY VEHICLE 4WD, SPORT UTILITY VEHICLE AWD | 6 Cyl 3.6L
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GMC Acadia Head Assembly,Cyl (Reman) 2012, 2017 Llt Lh
Part Number: 19329673
$1096.76 MSRP: $1738.81
You Save: $642.05 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012 GMC Acadia | SPORT UTILITY VEHICLE 2WD, SPORT UTILITY VEHICLE 4WD | 6 Cyl 3.6L
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GMC Acadia Cylinder Head Kit (H.O. Ly7, Rh)(No Valves, Etc)
Part Number: 12634223
$539.21 MSRP: $852.75
You Save: $313.54 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Head Kit, Cyl (H.O. Ly7, Rh)(No Valves, Etc) ; Head, Engine Cylinder; Cylinder Head
- Replaced by: 19301152
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 GMC Acadia | SPORT UTILITY VEHICLE 2WD, SPORT UTILITY VEHICLE 4WD | 6 Cyl 3.6L
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GMC Acadia Cylinder Head Assembly (W/ Valve)
Part Number: 12684222
$751.89 MSRP: $1193.49
You Save: $441.60 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Head Assembly, Cyl (W/ Vlv); Cylinder Head
- Replaces: 12668131
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2017-2021 GMC Acadia | DENALI SUV, SLE SUV, SLE2 & ALL TERRAIN SUV, SLE2 SUV, SLT & ALL TERRAIN SUV, SLT SUV, SLT2 SUV | 6 Cyl 3.6L
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GMC Acadia Cylinder Head Assembly (W/ Valve)
Part Number: 55504792
$1132.50 MSRP: $1798.05
You Save: $665.55 (38%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Head Assembly, Cyl (W/ Vlv); Cylinder Head
- Replaced by: 12729488
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2021 GMC Acadia | DENALI SUV, SLE SUV, SLT SUV | 4 Cyl 2.0L
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GMC Acadia Head Assembly, Cyl (W/ Vlv)
Part Number: 12686233
$302.73 MSRP: $478.46
You Save: $175.73 (37%)
ADD TO CART
Product Specifications
- Other Name: Cylinder Head
- Replaces: 12673745, 12668132, 12677521, 12679109, 12679457
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2017-2021 GMC Acadia | DENALI SUV, SLE SUV, SLE2 & ALL TERRAIN SUV, SLE2 SUV, SLT & ALL TERRAIN SUV, SLT SUV, SLT2 SUV | 6 Cyl 3.6L
View related parts
GMC Acadia Cylinder Head Assembly (W/ Valve)
Part Number: 12680557
$764.27 MSRP: $1027.88
You Save: $263.61 (26%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Head Assembly, Cyl (W/ Valve); Cylinder Head
- Replaced by: 12690422
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2017-2021 GMC Acadia | SLE SUV, SLE2 & ALL TERRAIN SUV, SLE2 SUV, SLT & ALL TERRAIN SUV, SLT SUV | 4 Cyl 2.5L
View related parts
GMC Acadia Cylinder Head Assembly (W/ Valve) (High Output Ly7)(Lh)
Part Number: 19301151
$333.00 MSRP: $526.32
You Save: $193.32 (37%)
Product Specifications
- Other Name: Head Assembly, Cyl (W/ Valve) (High Output Ly7)(Lh); Cylinder Head
- Replaces: 12634224
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 GMC Acadia | SPORT UTILITY VEHICLE 2WD, SPORT UTILITY VEHICLE 4WD | 6 Cyl 3.6L

GMC Acadia Cylinder Head Parts Questions & Experts Answers

Cylinder Head Kit (H.O. Ly7, Rh)(No Valves, Etc)
12634223
Q: How do you replace the cylinder heads?
A: Start by detaching the negative battery cable and relieving the fuel system pressure in order to change the cylinder heads. After that, empty out the cooling system and remove the engine/transaxle assembly. From there, take off the Intake Manifold(s), valve covers, and upper Timing Chains. Based on which head is being removed, ground wires should be disconnected from heads as well as different connectors and hoses. The head bolts must be slightly unscrewed following a particular order thereafter removed by hand while their lengths and positions are noted down. It is important to carefully lift these parts from above this machine avoiding prying them away since they should then be standing on wooden blocks. For installation, ensure mating surfaces on both cylinder heads and block are clean; use gasket removal solvents when necessary. Thoroughly clean up all surfaces in order to prevent oil-related sealing problems as well as clear debris from the cylinders. Inspect these areas for damage and fix it where necessary also chase threads with brake cleaner or clean thread holes in head bolt holes to produce right torque readings. Put new gaskets over dowels in block; then put these heads back without moving gaskets very much. Use thread locking compound to cover threads for new 8 mm head bolt(s). Then tighten these new 11 mm head bolts according to torque specifications followed by angle of rotation specified sequence having previously installed them finger-tight onto these newly coated threads with this substance named thread lockers. To complete reassembly follow this dismantling process backwards including installing again engine/transaxle assembly, replacing engine oil filter also refilling coolant however lubricant compartment respectively at last begin its startup operation before inspecting water or oil leakages if any present within that mechanism's working system.

Related GMC Acadia Parts

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