Chevrolet Silverado / GMC Sierra. Service manual — part 130

Fig. 436: Removing Cylinder Bore Ring Ridge
Courtesy of GENERAL MOTORS CORP.

1. Use the J 24270 in order to remove the cylinder ring ridge. See Special Tools.

1. Turn the crankshaft until the piston is at the bottom of the stroke.

2. Place a cloth on top of the piston.

3. Use the J 24270 to remove all of the cylinder ring ridge. See Special Tools.

4. Turn the crankshaft so the piston is at the top of the stroke.

5. Remove the cloth.

6. Remove the cutting debris.

IMPORTANT: The connecting rods and rod bearing caps are NOT

interchangeable. Using a paint stick or etching tool, place

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 437: View Of Bearing, Bearing Cap & Bolts
Courtesy of GENERAL MOTORS CORP.

2. Remove the connecting rod bolts, cap, and bearing.

match marks or numbers on the connecting rods and the
connecting rod bearing caps prior to removal to ensure that
they are assembled in their original position and direction,
with the connecting rod/rod bearing cap mating surfaces
properly oriented and aligned.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

3. Remove the connecting rod and the piston out of the top of the engine block.

4. Remove the connecting rod bearings from the connecting rod.

Keep all connecting rod bearings and rod bearing caps with the original connecting
rods, and in the original orientation at the connecting rod/rod bearing cap mating area.

Wipe the oil from the connecting rod bearings.

Wipe the oil from the crankpins.

CRANKSHAFT REAR OIL SEAL AND HOUSING REMOVAL

IMPORTANT: Wrap a clean, lint free towel around the connecting rod ends

when removing the piston from the cylinder so as not to
damage the crankshaft journals or cylinder bore.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 438: Crankshaft Rear Oil Seal Notches
Courtesy of GENERAL MOTORS CORP.

1. Remove the crankshaft rear oil seal from the crankshaft rear oil seal housing.

Insert a suitable tool into the access notches and then carefully pry the crankshaft rear oil
seal from the crankshaft rear oil seal housing.

2. Discard the crankshaft rear oil seal.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado