How to Replace the Left Side Exhaust Manifold on a 3.6L Engine on 2009 Cadillac STS?

Starting the replacement of the left side Exhaust Manifold (LY7) for 3.6l engines requires first performing the Exhaust Manifold heat shield removal. The next operation involves the removal of the oil level indicator. You should first disconnect the Catalytic Converter nuts and the Exhaust Manifold bolts yet refrain from using the gasket twice. First remove the exhausted manifold alongside its gasket. Then clean the Exhaust Manifold for inspection. The first step for installation requires checking the Catalytic Converter seal/heat shield sealing surface for wear and damage then replacing any defective areas. Install a new Catalytic Converter seal/heat shield to the Catalytic Converter unit then place a new Exhaust Manifold gasket between the Exhaust Manifold parts. Attach the Exhaust Manifold with its gasket both to the Catalytic Converter and Cylinder Head before tightening the Exhaust Manifold bolts to 20 nm (15 lb ft). The installation of next comes with the Catalytic Converter nuts which should be tightened to 50 nm (37 lb ft). Install the oil level indicator and complete the task by mounting the Exhaust Manifold heat shield.

OEM 2009 Cadillac STS Exhaust Manifold

Engine Exhaust Manifold

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6 Exhaust Manifolds found

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2009 Cadillac STS Exhaust Manifold, Driver Side
Part Number: 12638993
Product Specifications
- Other Name: Manifold, Catalytic Converter; Manifold, Engine Exhaust Manifold
- Position: Driver Side
- Replaces: 12606643
- Item Weight: 20.60 Pounds
- Item Dimensions: 32.3 x 10.5 x 5.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12638993
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2009 Cadillac STS Submodels:
- V | 8 Cyl 4.4 L GAS
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2009 Cadillac STS Exhaust Manifold, Driver Side
Part Number: 12571102
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Position: Driver Side
- Item Weight: 8.00 Pounds
- Item Dimensions: 15.3 x 7.3 x 7.5 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12571102
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2009 Cadillac STS Submodels:
- Base, Platinum | 6 Cyl 3.6 L GAS
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2009 Cadillac STS Exhaust Manifold, Passenger Side
Part Number: 12638994
Product Specifications
- Other Name: Manifold, Catalytic Converter; Manifold, Engine Exhaust Manifold
- Position: Passenger Side
- Replaces: 12606642
- Item Weight: 21.60 Pounds
- Item Dimensions: 33.8 x 10.2 x 5.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12638994
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2009 Cadillac STS Submodels:
- V | 8 Cyl 4.4 L GAS
View related parts
2009 Cadillac STS Exhaust Manifold, Driver Side
Part Number: 12638999
Product Specifications
- Other Name: Manifold, Exhaust (W/3Way Catalytic Converter); Manifold; Manifold, Engine Exhaust Manifold; Manifold, Catalytic Converter
- Position: Driver Side
- Replaces: 12607451
- Item Weight: 20.20 Pounds
- Item Dimensions: 31.7 x 10.4 x 5.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12638999
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2009 Cadillac STS Submodels:
- Base, Platinum | 8 Cyl 4.6 L GAS
View related parts
2009 Cadillac STS Exhaust Manifold, Passenger Side
Part Number: 12638996
Product Specifications
- Other Name: Manifold, Exhaust (W/3Way Catalytic Converter); Manifold; Manifold, Engine Exhaust Manifold; Manifold, Catalytic Converter
- Position: Passenger Side
- Replaces: 12607450
- Item Weight: 20.40 Pounds
- Item Dimensions: 32.0 x 10.5 x 4.3 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12638996
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2009 Cadillac STS Submodels:
- Base, Platinum | 8 Cyl 4.6 L GAS
View related parts
2009 Cadillac STS Exhaust Manifold, Passenger Side
Part Number: 12571101
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Position: Passenger Side
- Item Weight: 7.40 Pounds
- Item Dimensions: 15.0 x 7.5 x 7.4 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12571101
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2009 Cadillac STS Submodels:
- Base, Platinum | 6 Cyl 3.6 L GAS

2009 Cadillac STS Exhaust Manifold

With a comprehensive array of OEM 2009 Cadillac STS Exhaust Manifold, from fuel pumps to door handles, our website is a one-stop-shop for your needs. All our genuine 2009 Cadillac STS Exhaust Manifold are backed by the manufacturer's warranty and are offered at competitive prices in the market. Rest assured, you can shop with complete confidence.

2009 Cadillac STS Exhaust Manifold Parts Questions & Experts Answers

Q: How to Replace the Left Side Exhaust Manifold on a 3.6L Engine on 2009 Cadillac STS?
A: Starting the replacement of the left side Exhaust Manifold (LY7) for 3.6l engines requires first performing the Exhaust Manifold heat shield removal. The next operation involves the removal of the oil level indicator. You should first disconnect the Catalytic Converter nuts and the Exhaust Manifold bolts yet refrain from using the gasket twice. First remove the exhausted manifold alongside its gasket. Then clean the Exhaust Manifold for inspection. The first step for installation requires checking the Catalytic Converter seal/heat shield sealing surface for wear and damage then replacing any defective areas. Install a new Catalytic Converter seal/heat shield to the Catalytic Converter unit then place a new Exhaust Manifold gasket between the Exhaust Manifold parts. Attach the Exhaust Manifold with its gasket both to the Catalytic Converter and Cylinder Head before tightening the Exhaust Manifold bolts to 20 nm (15 lb ft). The installation of next comes with the Catalytic Converter nuts which should be tightened to 50 nm (37 lb ft). Install the oil level indicator and complete the task by mounting the Exhaust Manifold heat shield.