What steps must be taken to remove the crankshaft from the engine after it has been taken out on Chevrolet Astro?

The crankshaft can only be removed after the engine has been taken out of the vehicle, assuming that the flywheel or driveplate, vibration damper/crankshaft pulley hub, timing chain (for V6 engines), oil pan, oil pump, and piston/connecting rod assemblies have been detached. For engines with a one-piece rear main oil seal, the seal housing must be unbolted from the block prior to crankshaft removal. First, check the end play by mounting a dial indicator aligned with the crankshaft and touching one of the crank throws. Push the crankshaft to the rear and zero the dial indicator, then pry it to the front and note the reading, which indicates the end play. If the end play exceeds specifications, inspect the thrust surfaces for wear; if no wear is found, new main bearings may resolve the issue. If a dial indicator is unavailable, feeler gauges can be used by prying the crankshaft to the front and measuring the clearance between the crankshaft and the thrust main bearing. Check the main bearing caps for markings indicating their locations, numbering them consecutively from front to rear if necessary, and loosen the bolts gradually until they can be removed by hand. Gently tap the caps with a soft-face hammer to separate them from the block, using the bolts as levers if needed, and take care not to drop the bearing inserts. Finally, lift the crankshaft out of the engine, ideally with assistance, and return the bearing inserts to their positions in the block and main bearing caps, tightening the bolts finger tight.

How to remove the Crankshaft Seal and Crankshaft in V8 engine on Chevrolet Caprice?

The crankshaft and main bearings ought not to be removed except when the engine has been removed from the car, and the engine should initially be dismantled. It is advisable that each of the five main bearing caps should be labeled to show where they belong in the engine block; if this is done, indentations as would be done with the connecting rods and caps should be made. After loosening the main bearing caps they should each be removed from the crankshaft with their corresponding bearing and should be laid on another work bench numbered as per the position of the bearing caps on the engine. The crankshaft can then be slowly pulled out with the use of lifters so as not to wreck the engine block. The two halve of the rear main bearing oil seal has to be detached, The crank shaft main bearings together with the cylinder block and main bearing caps should be withdrawn in such a manner that they will not be mixed since they have their own positions. Last, the crankshaft gear at the front must be removed which is best to be done with a puller intended for this job.

How to inspect and repair a crankshaft on Chevrolet Tracker?

Remove all burrs from the crankshaft oil holes with a stone, file or scraper, ensuring the oil holes are chamfered to prevent damage to new bearings. Check the main and connecting rod bearing journals for uneven wear, scoring, pits and cracks. Rub a penny across each journal several times to reveal its condition-if copper rubs off and is embedded in the crankshaft, the journals should be reground. Clean the crankshaft with solvent and dry it with compressed air, using a stiff brush to clean the oil holes and flush them with solvent. Check the rest of the crankshaft for cracks and other damage, which should be revealed by mag-nafluxing. Measure the diameter of the main and connecting rod journals with a micrometer and compare the results to the Specifications. If the crankshaft journals are damaged, tapered, out of round or worn beyond the limits given in the Specifications, have the crankshaft reground by an automotive machine shop and use the correct size bearing inserts if the crankshaft is reconditioned. Check the oil seal journals at each end of the crankshaft for wear and damage. If the seal has worn a groove in the journal, or if it's nicked or scratched, the new seal may leak when the engine is reassembled. In some cases, an automotive machine shop may be able to repair the journal by pressing on a thin sleeve. If repair isn't feasible, a new or different crankshaft should be installed. Examine the main and rod bearing inserts.

Genuine Chevrolet Crankshaft

Crank Shaft

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127 Crankshafts found

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Chevrolet Crankshaft
Part Number: 12661875
$582.24 MSRP: $1004.39
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Product Specifications
- Replaces: 12617226, 12621352, 12623075, 12601938
Fits the following Chevrolet Models:
- Camaro | 2010-2011 | 2 DOOR CONVERTIBLE, 2 DOOR COUPE | 6 Cyl 3.6L
- Traverse | 2009-2017 | SPORT UTILITY VEHICLE 2WD, SPORT UTILITY VEHICLE 4WD, SPORT UTILITY VEHICLE AWD | 6 Cyl 3.6L
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Chevrolet Engine Crankshaft
Part Number: 12588614
$270.31 MSRP: $431.12
You Save: $160.81 (38%)
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Product Specifications
- Other Name: Crankshaft Asm ; Crankshaft, Engine; Crankshaft
Fits the following Chevrolet Models:
- Avalanche | 2007-2013 | 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex
- Colorado | 2009-2012 | CREW CAB, EXTENDED CAB, EXTENDED LENGTH, PICKUP | 8 Cyl 5.3L
- Express | 2008-2014 | 1/2 TON CARGO EXPRESS, 1/2 TON CARGO SAVANA, 1/2 TON PASSENGER EXPRESS, 1/2 TON PASSENGER SAVANA | 8 Cyl 5.3L
- Silverado | 2007-2013 | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex
- Suburban | 2007-2014 | 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex
- Tahoe | 2007-2014 | 4 DOOR 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex
- Trailblazer | 2007-2009 | 4 DOOR | 8 Cyl 5.3L
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Chevrolet Crankshaft Assembly
Part Number: 12578164
$711.15 MSRP: $1134.22
You Save: $423.07 (38%)
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Product Specifications
- Other Name: Crankshaft Asm; Crankshaft
- Replaces: 12578182, 12623302
Fits the following Chevrolet Models:
- Captiva Sport | 2012-2015 | SPORT LS FWD, SPORT LT FWD | 4 Cyl 2.4L
- Equinox | 2010-2017 | LS SUV, LT SUV, LTZ SUV | 4 Cyl 2.4L
- Impala | 2014 | LS 4 DOOR NOTCHBACK, LT 4 DOOR NOTCHBACK | 4 Cyl 2.4L
- Malibu | 2008-2012 | 4 DOOR HYBRID, LS 4 DOOR NOTCHBACK, LT 4 DOOR NOTCHBACK, LTZ 4 DOOR NOTCHBACK | 4 Cyl 2.4L
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Chevrolet Engine Crankshaft
Part Number: 55574335
$211.98 MSRP: $337.94
You Save: $125.96 (38%)
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Product Specifications
- Other Name: Crankshaft Asm ; Crankshaft, Engine; Crankshaft
Fits the following Chevrolet Models:
- Cruze | 2011-2016 | LT / LTZ 4 DOOR NOTCHBACK, LT 4 DOOR NOTCHBACK | 4 Cyl 1.4L
- Sonic | 2012-2020 | 4 DOOR HATCHBACK, 4 DOOR NOTCHBACK, LS 4 DOOR NOTCHBACK/SEDAN, LT 4 DOOR NOTCHBACK/SEDAN, LT 5 DOOR HATCHBACK, LTZ 4 DOOR NOTCHBACK/SEDAN, LTZ 5 DOOR HATCHBACK, RS 4 DOOR NOTCHBACK/SEDAN, RS 5 DOOR HATCHBACK | 4 Cyl 1.4L
- Trax | 2015-2021 | LS 4 DOOR SPORT UTILITY, LT 4 DOOR SPORT UTILITY, LTZ 4 DOOR SPORT UTILITY | 4 Cyl 1.4L
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Chevrolet Engine Crankshaft
Part Number: 90537273
$374.44
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Crankshaft Asm ; Crankshaft, Engine; Crankshaft
Fits the following Chevrolet Models:
- Cavalier | 2002-2005 | 2 DOOR, 4 DOOR | 4 Cyl 2.2L, 4 Cyl 2.2L Flex
- Cobalt | 2005-2006 | 2 DOOR, 4 DOOR, LEVEL 4 PERFORMANCE (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL ONE (LS) 2 DOOR, LEVEL ONE (LS) 4 DOOR, LEVEL THREE (SS) 2 DOOR, LEVEL THREE (SS) 4 DOOR, LEVEL TWO (LT) 2 DOOR, LEVEL TWO (LT) 4 DOOR | 4 Cyl 2.2L
- HHR | 2006 | 5 DOOR HIGH ROOF HATCHBACK, 5 DOOR UPLEVEL HIGH ROOF HATCHBACK | 4 Cyl 2.2L
- Malibu | 2004-2006 | 4 DOOR HATCHBACK, 4 DOOR NOTCHBACK, CLASSIC 4 DOOR NOTCHBACK, LS 4 DOOR HATCHBACK, LS 4 DOOR NOTCHBACK, LT 4 DOOR HATCHBACK, LT 4 DOOR NOTCHBACK, MAXX SS 4 DOOR HATCHBACK, SS 4 DOOR NOTCHBACK | 4 Cyl 2.2L
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Chevrolet Crankshaft
Part Number: 12661864
$638.92 MSRP: $1019.03
You Save: $380.11 (38%)
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Product Specifications
- Replaces: 12616835, 12610050
Fits the following Chevrolet Models:
- Captiva Sport | 2012-2015 | SPORT LT FWD | 6 Cyl 3.0L
- Equinox | 2010-2012 | LT SUV, LTZ SUV | 6 Cyl 3.0L
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Chevrolet Engine Crankshaft
Part Number: 19177749
$393.21 MSRP: $536.02
You Save: $142.81 (27%)
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Product Specifications
- Other Name: Crankshaft Asm ; Crankshaft, Engine; Crankshaft
- Replaces: 89060401
Fits the following Chevrolet Models:
- Colorado | 2007-2012 | CREW CAB, EXTENDED CAB, EXTENDED LENGTH, PICKUP | 4 Cyl 2.9L
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Chevrolet Engine Crankshaft
Part Number: 88958866
$195.86 MSRP: $309.56
You Save: $113.70 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Crankshaft, Engine; Crankshaft
Fits the following Chevrolet Models:
- Trailblazer | 2002-2005 | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L
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Chevrolet Engine Crankshaft
Part Number: 12623074
$585.33 MSRP: $933.17
You Save: $347.84 (38%)
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Product Specifications
- Other Name: Crankshaft Asm ; Crankshaft, Engine; Crankshaft
- Replaces: 12571127, 12601939, 12621351, 12621353
Fits the following Chevrolet Models:
- Equinox | 2008-2009 | SS SUV AWD, SS SUV FWD, SUV AWD, SUV FWD, SUV LT AWD, SUV LT FWD | 6 Cyl 3.6L
- Malibu | 2008-2012 | 4 DOOR HYBRID, LS 4 DOOR NOTCHBACK, LT 4 DOOR NOTCHBACK, LTZ 4 DOOR NOTCHBACK | 6 Cyl 3.6L
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Chevrolet Crankshaft Assembly
Part Number: 12674744
$792.68 MSRP: $1366.84
You Save: $574.16 (43%)
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Product Specifications
- Other Name: Crankshaft Asm; Crankshaft
- Replaces: 12629940
Fits the following Chevrolet Models:
- Corvette | 2014-2019 | 2 DOOR, 2 DOOR CONVERTIBLE | 8 Cyl 6.2L
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Chevrolet Crankshaft Assembly
Part Number: 12685650
$444.51 MSRP: $708.65
You Save: $264.14 (38%)
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Product Specifications
- Other Name: Crankshaft Assembly, .; Crankshaft
- Replaces: 12619781
Fits the following Chevrolet Models:
- Silverado | 2014-2024 | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, CREW 5'8" BOX 1/2 TON, CREW 5'8" BOX 1/2 TON(VIN REQ'D), CREW CAB 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 5.3L, 8 Cyl5.3L
- Suburban | 2015-2024 | 1/2 TON, 1500 4 DOOR UTILITY | 8 Cyl 5.3L
- Tahoe | 2015-2024 | 1500 4 DOOR UTILITY, 4 DOOR 1/2 TON | 8 Cyl 5.3L
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Chevrolet CRANKSHAFT ASM,.
Part Number: 19431873
$478.90 MSRP: $763.62
You Save: $284.72 (38%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 12685659, 12597569, 12584997
Fits the following Chevrolet Models:
- Avalanche | 2007 | 1/2 TON
- Camaro | 2010-2015 | SS 2 DOOR CONVERTIBLE, SS 2 DOOR COUPE | 8 Cyl 6.2L
- Corvette | 2008-2013 | 2 DOOR, CONVERTIBLE | 8 Cyl 6.2L
- SS | 2014-2017 | SS 4 DOOR SEDAN | 8 Cyl 6.2L
- Silverado | 2007-2009 | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 6.2L Flex
- Suburban | 2007 | 1/2 TON
- Tahoe | 2007 | 4 DOOR 1/2 TON
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Chevrolet Crankshaft Assembly
Part Number: 12699162
$382.95 MSRP: $610.52
You Save: $227.57 (38%)
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Product Specifications
- Other Name: Crankshaft Assembly, .; Crankshaft
- Replaces: 12676729, 12646883
Fits the following Chevrolet Models:
- Blazer | 2019-2024 | HIGH COUNTRY/LTZ 4 DOOR SUV, LT 4 DOOR SUV, RS 4 DOOR SUV | 6 Cyl 3.6L
- Camaro | 2016-2024 | 2 DOOR CONVERTIBLE 1LS/1LT, 2 DOOR CONVERTIBLE 1LT, 2 DOOR CONVERTIBLE 2LT, 2 DOOR COUPE 1LS/1LT, 2 DOOR COUPE 1LT, 2 DOOR COUPE 2LT | 6 Cyl 3.6L
- Colorado | 2017-2022 | CREW CAB - 5'2" BOX, CREW CAB - 6'2" BOX, CREW CAB LS - 6'2" BOX, CREW CAB LT - 6'2" BOX, EXT CAB - 6'2" BOX, EXTENDED CAB - 6'2" BOX, LS CREW CAB - 5'2" BOX, LS EXTENDED CAB - 6'2" BOX, LT CREW CAB - 5'2" BOX, LT EXTENDED CAB - 6'2" BOX | 6 Cyl 3.6L
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Chevrolet Engine Crankshaft
Part Number: 12598044
$359.11 MSRP: $567.58
You Save: $208.47 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Crankshaft Asm ; Crankshaft, Engine; Crankshaft
Fits the following Chevrolet Models:
- Equinox | 2007-2009 | SS SUV AWD, SS SUV FWD, SUV AWD, SUV FWD, SUV LT AWD, SUV LT FWD | 6 Cyl 3.4L
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Chevrolet Crankshaft
Part Number: 12661873
$564.41 MSRP: $900.16
You Save: $335.75 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Replaces: 12630898
Fits the following Chevrolet Models:
- Camaro | 2012-2015 | LS 2 DOOR COUPE, LT 2 DOOR CONVERTIBLE, LT 2 DOOR COUPE | 6 Cyl 3.6L
- Colorado | 2015-2016 | CREW CAB - 5'2" BOX, CREW CAB - 6'2" BOX, CREW CAB LS - 6'2" BOX, CREW CAB LT - 6'2" BOX, EXTENDED CAB - 6'2" BOX, LS CREW CAB - 5'2" BOX, LS EXTENDED CAB - 6'2" BOX, LT CREW CAB - 5'2" BOX, LT EXTENDED CAB - 6'2" BOX | 6 Cyl 3.6L
- Equinox | 2013-2017 | LT SUV, LTZ SUV | 6 Cyl 3.6L
- Impala | 2012-2020 | LS, LS 4 DOOR NOTCHBACK, LT 4 DOOR NOTCHBACK, LTZ, LTZ 4 DOOR NOTCHBACK | 6 Cyl 3.6L
- Traverse | 2018-2024 | 1LT/2LT EXTENDED 4 DOOR SUV, 1LZ/2LZ EXTENDED 4 DOOR SUV, LS EXTENDED 4 DOOR SUV, LT EXTENDED 4 DOOR SUV, LTZ EXTENDED 4 DOOR SUV | 6 Cyl 3.6L
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Chevrolet Crankshaft Assembly
Part Number: 12680206
$2687.02 MSRP: $4029.07
You Save: $1342.05 (34%)
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Product Specifications
- Other Name: Crankshaft Assembly, .; Crankshaft
- Replaces: 12635333, 12641925
Fits the following Chevrolet Models:
- Express | 2010-2016 | 1 TON CARGO EXPRESS, 1 TON CARGO SAVANA, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER EXPRESS, 3/4 TON PASSENGER SAVANA | 8 Cyl 6.6L Diesel
- Silverado | 2011-2016 | 2500 CREW CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CREW CAB LONG BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 DOUBLE CAB LONG BOX, 3500 REGULAR CAB, CREW CAB 1 TON, CREW CAB 2500 LONG BOX, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, DOUBLE CAB 2500 LONG BOX, DOUBLE CAB 2500 STANDARD BOX, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CAB CHASSIS 1 TON 161.5, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON, REGULAR CAB CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5 | 8 Cyl 6.6L Diesel
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Chevrolet Engine Crankshaft
Part Number: 14088526
$555.37 MSRP: $670.13
You Save: $114.76 (18%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Crankshaft, Engine; Crankshaft
- Replaces: 14088527
Fits the following Chevrolet Models:
- Blazer | 1985-1994 | 1/2 TON | 8 Cyl 5.0L, 8 Cyl 5.7L
- C10 | 1985-1986 | REGULAR CAB LONG BOX, REGULAR CAB STANDARD BOX | 8 Cyl 5.0L, 8 Cyl 5.7L
- C1500 | 1988-1995 | C1500 EXTENDED CAB LONG BOX, C1500 EXTENDED CAB STANDARD BOX, C1500 REGULAR CAB LONG BOX, C1500 REGULAR CAB STANDARD BOX | 8 Cyl 5.0L, 8 Cyl 5.7L
- C20 | 1985-1986 | CREW CAB, REGULAR CAB | 8 Cyl 5.0L, 8 Cyl 5.7L
- C2500 | 1988-1995 | C2500 EXTENDED CAB LONG BOX, C2500 EXTENDED CAB STANDARD BOX, C2500 REGULAR CAB | 8 Cyl 5.0L, 8 Cyl 5.7L
- C30 | 1985-1986 | CAB CHASSIS 135.5, CAB CHASSIS 159.9, CREW CAB, REGULAR CAB | 8 Cyl 5.7L
- C3500 | 1988-1995 | C3500 CAB CHASSIS 135.5, C3500 CAB CHASSIS 159.9, C3500 CAB CHASSIS 183.5, C3500 CREW CAB LONG WHEELBASE, C3500 EXTENDED CAB, C3500 REGULAR CAB | 8 Cyl 5.7L
- Camaro | 1987-1989 | 2 DOOR, RS 2 DOOR, RS CONVERTIBLE | 8 Cyl 5.7L
- Corvette | 1984-1991 | 2 DOOR, CONVERTIBLE | 8 Cyl 5.7L
- G10 | 1985-1995 | 1 TON CARGO, 1 TON COMMERCIAL/RECREATIONAL VEHICLE, 1 TON PASSENGER, 1/2 TON CARGO, 1/2 TON PASSENGER, 3/4 TON CARGO, 3/4 TON PASSENGER | 8 Cyl 5.0L, 8 Cyl 5.7L
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Chevrolet Crankshaft Assembly
Part Number: 12664179
$822.61 MSRP: $1311.98
You Save: $489.37 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Crankshaft Assembly, .; Crankshaft
Fits the following Chevrolet Models:
- Silverado | 2019-2021 | CREW 5'8" BOX 1/2 TON, CREW 5'8" BOX 1/2 TON(VIN REQ'D), CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 4 Cyl 2.7L
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Chevrolet Crankshaft Assembly
Part Number: 55498908
$248.56 MSRP: $294.65
You Save: $46.09 (16%)
Product Specifications
- Other Name: Crankshaft Assembly, .; Crankshaft
- Replaced by: 55512256
Fits the following Chevrolet Models:
- Cruze | 2017-2019 | LT 4 DOOR HATCHBACK, LT 4 DOOR SEDAN | 4 Cyl 1.6L Diesel
- Equinox | 2018-2019 | 4 DOOR LT , 4 DOOR LTZ | 4 Cyl 1.6L Diesel
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Chevrolet Crankshaft Assembly
Part Number: 12588615
$288.77 MSRP: $456.39
You Save: $167.62 (37%)
Product Specifications
- Other Name: Crankshaft Asm ; Crankshaft, Engine; Crankshaft
Fits the following Chevrolet Models:
- Avalanche | 2007 | 1/2 TON
- Express | 2008-2017 | 1 TON CARGO EXPRESS, 1 TON CARGO SAVANA, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER EXPRESS, 3/4 TON PASSENGER SAVANA | 8 Cyl 4.8L, 8 Cyl 4.8L Flex
- Silverado | 2007-2013 | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 4.8L, 8 Cyl 4.8L Flex
- Suburban | 2007 | 1/2 TON
- Tahoe | 2007-2009 | 4 DOOR 1/2 TON | 8 Cyl 4.8L
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Chevrolet Crankshaft

At GMPartsGiant.com, we offer an extensive inventory of genuine Chevrolet Crankshafts at competitive prices in the market. All our OEM Chevrolet Crankshafts are backed by the manufacturer's warranty and will be shipped promptly to your doorstep. Rest assured, our hassle-free return policy is designed to support you throughout your shopping experience!

Chevrolet Crankshaft Parts Questions & Experts Answers

Engine Crankshaft
12555637
Q: What steps must be taken to remove the crankshaft from the engine after it has been taken out on Chevrolet Astro?
A:
The crankshaft can only be removed after the engine has been taken out of the vehicle, assuming that the flywheel or driveplate, vibration damper/crankshaft pulley hub, timing chain (for V6 engines), oil pan, oil pump, and piston/connecting rod assemblies have been detached. For engines with a one-piece rear main oil seal, the seal housing must be unbolted from the block prior to crankshaft removal. First, check the end play by mounting a dial indicator aligned with the crankshaft and touching one of the crank throws. Push the crankshaft to the rear and zero the dial indicator, then pry it to the front and note the reading, which indicates the end play. If the end play exceeds specifications, inspect the thrust surfaces for wear; if no wear is found, new main bearings may resolve the issue. If a dial indicator is unavailable, feeler gauges can be used by prying the crankshaft to the front and measuring the clearance between the crankshaft and the thrust main bearing. Check the main bearing caps for markings indicating their locations, numbering them consecutively from front to rear if necessary, and loosen the bolts gradually until they can be removed by hand. Gently tap the caps with a soft-face hammer to separate them from the block, using the bolts as levers if needed, and take care not to drop the bearing inserts. Finally, lift the crankshaft out of the engine, ideally with assistance, and return the bearing inserts to their positions in the block and main bearing caps, tightening the bolts finger tight.
Engine Crankshaft
10224877
Q: How to remove the Crankshaft Seal and Crankshaft in V8 engine on Chevrolet Caprice?
A:
The crankshaft and main bearings ought not to be removed except when the engine has been removed from the car, and the engine should initially be dismantled. It is advisable that each of the five main bearing caps should be labeled to show where they belong in the engine block; if this is done, indentations as would be done with the connecting rods and caps should be made. After loosening the main bearing caps they should each be removed from the crankshaft with their corresponding bearing and should be laid on another work bench numbered as per the position of the bearing caps on the engine. The crankshaft can then be slowly pulled out with the use of lifters so as not to wreck the engine block. The two halve of the rear main bearing oil seal has to be detached, The crank shaft main bearings together with the cylinder block and main bearing caps should be withdrawn in such a manner that they will not be mixed since they have their own positions. Last, the crankshaft gear at the front must be removed which is best to be done with a puller intended for this job.
Engine Crankshaft (On Esn)
91177510
Q: How to inspect and repair a crankshaft on Chevrolet Tracker?
A:
Remove all burrs from the crankshaft oil holes with a stone, file or scraper, ensuring the oil holes are chamfered to prevent damage to new bearings. Check the main and connecting rod bearing journals for uneven wear, scoring, pits and cracks. Rub a penny across each journal several times to reveal its condition-if copper rubs off and is embedded in the crankshaft, the journals should be reground. Clean the crankshaft with solvent and dry it with compressed air, using a stiff brush to clean the oil holes and flush them with solvent. Check the rest of the crankshaft for cracks and other damage, which should be revealed by mag-nafluxing. Measure the diameter of the main and connecting rod journals with a micrometer and compare the results to the Specifications. If the crankshaft journals are damaged, tapered, out of round or worn beyond the limits given in the Specifications, have the crankshaft reground by an automotive machine shop and use the correct size bearing inserts if the crankshaft is reconditioned. Check the oil seal journals at each end of the crankshaft for wear and damage. If the seal has worn a groove in the journal, or if it's nicked or scratched, the new seal may leak when the engine is reassembled. In some cases, an automotive machine shop may be able to repair the journal by pressing on a thin sleeve. If repair isn't feasible, a new or different crankshaft should be installed. Examine the main and rod bearing inserts.