How can you ensure the crankshaft oil holes are properly prepared and the crankshaft is in good condition before reassembly on Chevrolet Blazer?

Remove all burrs from the crankshaft oil holes with a stone, file, or scraper to ensure the oil holes are chamfered, preventing sharp edges from gouging or scratching the new bearings. Clean the crankshaft with solvent and dry it with compressed air if available, ensuring to clean the oil holes with a stiff brush and flush them with solvent. Check the main and connecting rod bearing journals for uneven wear, scoring, pits, and cracks, and inspect the rest of the crankshaft for cracks and other damage, which should be magnafluxed by an automotive machine shop to reveal hidden issues. Using a micrometer, measure the diameter of the main and connecting rod journals at several points to detect taper and out-of-round conditions, taking measurements at each end of the journal near the crank throws. If the crankshaft journals are damaged, tapered, out-of-round, or worn beyond specified limits, have the crankshaft reground by an automotive machine shop, ensuring the use of the correct size bearing inserts if reconditioned. Check the oil seal journals at each end of the crankshaft for wear and damage; if grooves, nicks, or scratches are present, the new seal may leak upon reassembly. In some cases, an automotive machine shop may repair the journal by pressing on a thin sleeve, but if repair isn't feasible, a new or different crankshaft should be installed. Examine the main and rod bearing inserts for further assessment.

Genuine Chevrolet Blazer Crankshaft

Crank Shaft

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13 Crankshafts found

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Chevrolet Blazer Engine Crankshaft
Part Number: 12627163
$180.68 MSRP: $298.97
You Save: $118.29 (40%)
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Product Specifications
- Other Name: Crankshaft Asm; Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2021 Chevrolet Blazer | L 4 DOOR SUV, LT 4 DOOR SUV | 4 Cyl 2.5L
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Chevrolet Blazer Crankshaft Assembly
Part Number: 12699162
$387.48 MSRP: $610.52
You Save: $223.04 (37%)
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Product Specifications
- Other Name: Crankshaft Assembly, .; Crankshaft
- Replaces: 12676729, 12646883
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2024 Chevrolet Blazer | HIGH COUNTRY/LTZ 4 DOOR SUV, LT 4 DOOR SUV, RS 4 DOOR SUV | 6 Cyl 3.6L
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Chevrolet Blazer Engine Crankshaft
Part Number: 14088526
$559.39 MSRP: $670.13
You Save: $110.74 (17%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Crankshaft, Engine; Crankshaft
- Replaces: 14088527
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1994 Chevrolet Blazer | 1/2 TON | 8 Cyl 5.0L, 8 Cyl 5.7L
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Chevrolet Blazer Engine Crankshaft
Part Number: 12555637
$492.97 MSRP: $815.92
You Save: $322.95 (40%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Crankshaft, Engine; Crankshaft
- Replaces: 12558256
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2005 Chevrolet Blazer | 2 DOOR, 4 DOOR | 6 Cyl 4.3L
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Chevrolet Blazer Engine Crankshaft
Part Number: 10243070
$946.66 MSRP: $1566.80
You Save: $620.14 (40%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Crankshaft, Engine; Crankshaft
- Replaced by: 12691722
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-1994 Chevrolet Blazer | 1/2 TON
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Chevrolet Blazer Engine Crankshaft
Part Number: 23502596
$1149.22 MSRP: $1475.06
You Save: $325.84 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Crankshaft Asm ; Crankshaft, Engine; Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-1994 Chevrolet Blazer | 1/2 TON | 8 Cyl 6.5L Diesel
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Chevrolet Blazer Crankshaft Assembly
Part Number: 55504614
$478.04 MSRP: $753.53
You Save: $275.49 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Crankshaft Assembly, .; Crankshaft
- Replaced by: 12707785
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2022 Chevrolet Blazer | HIGH COUNTRY/LTZ 4 DOOR SUV, LT 4 DOOR SUV, RS 4 DOOR SUV | 4 Cyl 2.0L
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Chevrolet Blazer Crankshaft Assembly, .
Part Number: 12707785
$478.04 MSRP: $753.53
You Save: $275.49 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2024 Chevrolet Blazer | HIGH COUNTRY/LTZ 4 DOOR SUV, LT 4 DOOR SUV, RS 4 DOOR SUV | 4 Cyl 2.0L
View related parts
Chevrolet Blazer Engine Crankshaft
Part Number: 336782
Product Specifications
- Other Name: Crankshaft, Engine; Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1991 Chevrolet Blazer | 1/2 TON
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Chevrolet Blazer Crankshaft
Part Number: 3932444
Product Specifications
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1986 Chevrolet Blazer | 1/2 TON | 8 Cyl 5.0L, 8 Cyl 5.7L
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Chevrolet Blazer Crankshaft Assembly
Part Number: 23500246
Product Specifications
- Other Name: Crankshaft Asm; Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1991 Chevrolet Blazer | 1/2 TON | 8 Cyl 6.2L Diesel
View related parts
Chevrolet Blazer Engine Crankshaft
Part Number: 10224877
Product Specifications
- Other Name: Crankshaft Asm; Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-1995 Chevrolet Blazer | 1/2 TON, 2 DOOR, 4 DOOR | 6 Cyl 4.3L
- 1987-1988 Chevrolet Blazer | 1/2 TON | 6 Cyl 4.3L
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Chevrolet Blazer Ciguenal
Part Number: 93424913
Product Specifications
- Other Name: Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1989 Chevrolet Blazer | 1/2 TON

Chevrolet Blazer Crankshaft

The Chevrolet Blazer Crankshaft transforms the up and down force of the pistons into the smooth spinning power that eventually gives the SUV's wheels motion. This makes it a mainstay of the SUV's engine. Inside the block, the Crankshaft spins on precision journals with connecting rods gripping its offset throws. This transforms reciprocating motion into rotation for the transmission and axles. Two basic material styles have been applied for the Blazer over the years: cast iron Crankshaft units for everyday power levels and tougher forged steel variants that handle higher horsepower without flexing. The difference is in terms of strength and manufacture. Casting pours molten metal into shape for cost efficiency purposes, while forging compresses heated steel to align the grain of the steel for durability and impact resistance. Whichever type a Chevrolet owner finds under the hood, proper lubrication allows the journals to be separated from the bearings, avoiding scoring and knock damage and damaging vibration. Neglected oil changes or debris can starve the Crankshaft of the thin film it requires, causing metal to metal contact and the telltale rumble that indicates impending failure. Because removal requires pulling out the engine and installing numbered bearing caps and carefully torquing them in, replacing a worn unit is one of those difficult multihour tasks that the optimal Blazer drivers try only with detailed instructions. When maintained in a clean and well-oiled condition, a Chevrolet Crankshaft will easily outlive the vehicle itself.

Each OEM Chevrolet Blazer Crankshaft 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 Blazer Crankshaft Parts Questions & Experts Answers

Engine Crankshaft
12555637
Q: How can you ensure the crankshaft oil holes are properly prepared and the crankshaft is in good condition before reassembly on Chevrolet Blazer?
A:
Remove all burrs from the crankshaft oil holes with a stone, file, or scraper to ensure the oil holes are chamfered, preventing sharp edges from gouging or scratching the new bearings. Clean the crankshaft with solvent and dry it with compressed air if available, ensuring to clean the oil holes with a stiff brush and flush them with solvent. Check the main and connecting Rod Bearing journals for uneven wear, scoring, pits, and cracks, and inspect the rest of the crankshaft for cracks and other damage, which should be magnafluxed by an automotive machine shop to reveal hidden issues. Using a micrometer, measure the diameter of the main and connecting rod journals at several points to detect taper and out-of-round conditions, taking measurements at each end of the journal near the crank throws. If the crankshaft journals are damaged, tapered, out-of-round, or worn beyond specified limits, have the crankshaft reground by an automotive machine shop, ensuring the use of the correct size bearing inserts if reconditioned. Check the oil seal journals at each end of the crankshaft for wear and damage; if grooves, nicks, or scratches are present, the new seal may leak upon reassembly. In some cases, an automotive machine shop may repair the journal by pressing on a thin sleeve, but if repair isn't feasible, a new or different crankshaft should be installed. Examine the main and rod bearing inserts for further assessment.