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Crankshaft & Main Bearings

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NOTE: Crankshaft and main bearings size identification marks have changed after August 1995. See ENGINE TECHNICAL SERVICE BULLETIN No. 09-20-95.
  1. To install correct main bearings, measure crankshaft journal diameter. On 1995-96 models, also check crankshaft journal identification color (if equipped with an aftermarket part). See Fig 7. On 1997 models, also check crankshaft journal identification mark. See Fig 8. Measurement along with journal identification color will indicate crankshaft journal classification. See appropriate MAIN BEARINGS IDENTIFICATION table. Each classification has 3 different replacement main bearings, each identified by a different color (1995), color and mark (1996) or mark (1997). See Fig 9-Fig 11 . Check cylinder block main bearing bore identification mark to match correct bearing. Cylinder block main bearing bore identification marks are stamped on engine block. See Fig 12-Fig 13 . Select replacement main bearing from table.
  2. Bearings with oil groves should be installed on cylinder block side. Bearings without oil groves should be installed on bearing cap side. Install thrust bearings on both sides of No. 3 journal with grooves facing outward. Carefully install main bearing cap with arrows toward front of engine.
  3. Apply oil to bearing cap bolt threads and bearing surfaces. Progressively tighten bolts to specification in sequence. See Fig 16. After installing crankshaft bearings and main bearing main bearing cap, check crankshaft end play. Repair or replace as necessary. When installing crankshaft, apply a small amount of engine oil to lip of NEW rear crankshaft oil seal and apply a 1/8" bead of silicone rubber adhesive sealant along oil seal case. See Figure. Install crankshaft oil seal by tapping it into place using Seal Installer (MD998718).
1995 MAIN BEARINGS IDENTIFICATION

Application Replacement Bearing Identification Color
Crankshaft Journal Diameter In. (mm)/Identification Color (1)/Classification
2.3620-2.3622 (59.994-60.000)/Yellow/1
Cylinder Block Bearing Bore Identification Mark
I Pink
II Red
III Green
2.3617-2.3620 (59.988-59.994)/None/2
Cylinder Block Bearing Bore Identification Mark
I Red
II Green
III Black
2.3614-2.3617 (59.982-59.988)/White/3
Cylinder Block Bearing Bore Identification Mark
I Green
II Black
III Brown
(1) Service replacement parts have identification color, but factory-assembled parts have no identification color.
1996 MAIN BEARINGS IDENTIFICATION

Application Replacement Bearing Identification Color/Mark
Crankshaft Journal Diameter In. (mm)/Identification Color (1)/Classification
2.3620-2.3622 (59.994-60.000)/Yellow/1
Cylinder Block Bearing Bore Identification Mark
I Pink/1
II Red/2
III Green/3
2.3617-2.3620 (59.988-59.994)/None/2
Cylinder Block Bearing Bore Identification Mark
I Red/2
II Green/3
III Black/4
2.3614-2.3617 (59.982-59.988)/White/3
Cylinder Block Bearing Bore Identification Mark
I Green/3
II Black/4
III Brown/5
(1) Service replacement parts have identification color, but factory-assembled parts have no identification color.
1997 MAIN BEARINGS IDENTIFICATION

Application Replacement Bearing Identification Mark
Crankshaft Journal Diameter In. (mm)/Identification Mark/Classification
2.3620-2.3622 (59.994-60.000)/0/0
Cylinder Block Bearing Bore Identification Mark
I 1
II 2
III 3
2.3617-2.3620 (59.988-59.994)/1/I
Cylinder Block Bearing Bore Identification Mark
I 2
II 3
III 4
2.3614-2.3617 (59.982-59.988)/2/II
Cylinder Block Bearing Bore Identification Mark
I 3
II 4
III 5
Fig 1: Removing Piston Pin
G00078747Courtesy of CHRYSLER CORP.
Fig 2: Identifying Piston Pin Setting Tool
G00078748Courtesy of CHRYSLER CORP.
Fig 3: Measuring Piston, Connecting Rod & Pin
G00078744Courtesy of CHRYSLER CORP.
Fig 4: Preparing For Piston Pin Installation
G00078745Courtesy of CHRYSLER CORP.
Fig 5: Installing Piston Pin
G00078746Courtesy of CHRYSLER CORP.
Fig 6: Exploded View Of Piston & Rod Assembly
G00078739Courtesy of CHRYSLER CORP.
Fig 7: Locating Crankshaft Journal Identification Color (1995-96)
G00078741Courtesy of CHRYSLER CORP.
Fig 8: Locating Crankshaft Journal Identification Mark (1997)
G00081796Courtesy of CHRYSLER CORP.
Fig 9: Locating Main Bearing Identification Color (1995)
G00078740Courtesy of CHRYSLER CORP.
Fig 10: Locating Main Bearing Identification Color & Mark (1996)
G00081793Courtesy of CHRYSLER CORP.
Fig 11: Locating Main Bearing Identification Mark (1997)
G00081794Courtesy of CHRYSLER CORP.
Fig 12: Locating Engine Block Identification Marks (1995-96)
G00078742Courtesy of CHRYSLER CORP.
Fig 13: Locating Engine Block Identification Marks (1997)
G00081795Courtesy of CHRYSLER CORP.
Fig 14: Installing Compression Rings
G00078737Courtesy of CHRYSLER CORP.
Fig 15: Installing Oil Rings
G00078738Courtesy of DAIMLERCHRYSLER CORP.
Fig 16: Tightening Main Bearing Cap Bolts
G95A14829Courtesy of CHRYSLER CORP.
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