2006 DODGE RAM SRT-10 Crankshaft

SEAL-CRANKSHAFT OIL- FRONT
REMOVAL
1. Disconnect the air inlet duct, IAT sensor, CCV hose
at the throttle body, and remove the air cleaner
housing cover.
2. Remove accessory drive belt (Refer to 7 - COOL-
ING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL).
3. Remove crankshaft damper (Refer to 9 - ENGINE/
ENGINE BLOCK/CRANKSHAFT DAMPER -
REMOVAL).
4. Use Special Tool C-4679A (1) to remove crankshaft
oil seal. Be careful not to damage the crankshaft
seal surface of cover.
INSTALLATION
1. Install the new seal by using Special Tool MD
998306 (2).
2. Place seal into opening with seal spring towards
the inside of engine. Install seal until it bottoms out
in timing chain cover.
3. Install crankshaft damper (Refer to 9 - ENGINE/
ENGINE BLOCK/VIBRATION DAMPER - INSTAL-
LATION).
4. Install accessory drive belt (Refer to 7 - COOLING/
ACCESSORY DRIVE/DRIVE BELTS - INSTALLA-
TION).
5. Install air cleaner cover connecting the CVV hose,
IAT sensor, and air duct to the throttle body
housing.

SEAL-OIL-REAR-CRANK AND RETAINER
REMOVAL
1. Remove transmission (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/MANUAL - REMOVAL).
2. Remove clutch and flywheel (Refer to 6 - CLUTCH/
CLUTCH DISC - REMOVAL).
NOTE: The oil seal and retainer are serviced as an
assembly.
3. Remove the seal retainer bolts from cylinder block
and oil pan.
4. Remove the oil seal and retainer (1) assembly.
INSTALLATION
1. Clean the engine block and retainer. Make sure
surfaces are clean and free of oil.
2. Install Special Tool 9060 (1) (seal guide) onto end
of crankshaft. Align hole in tool with dowel pin on
crankshaft.

BEARINGS-CRANKSHAFT MAIN
DESCRIPTION
The main bearing caps are not interchangeable and
should be marked at removalto insure correct assem-
bly. Upper and lower main bearing halves are NOT
interchangeable. Lower main bearing halves of No. 1,
No. 2, No. 4, No. 5 and No. 6 are interchangeable.
Upper main bearing halves of No. 1, No. 2, No. 4, No.
5 and No. 6 are interchangeable.
Upper and lower No. 3 bearing halves are flanged to
carry the crankshaft thrust loads and are NOT inter-
changeable with any other bearing halves in the
engine. All bearing cap bolts removed during service
procedures are to be cleaned and oiled before instal-
lation. Bearing shells are available in standard and the
following undersizes: 0.025 mm (0.001 in.), 0.051 mm
(0.002 in.), 0.076 mm (0.003 in.), 0.254 mm (0.010
in.), 0.305 mm (0.012 in.) and 0.508 mm (0.020 in.).
Never install an undersize bearing that will reduce clearance below specifications.
STANDARD PROCEDURE
MEASURING CRANKSHAFT MAIN BEARING CLEARANCE IN-CAR
PLASTIGAGE METHOD
Engine crankshaft bearing clearances can be deter-
mined by use of Plastigage or equivalent. The follow-
ing is the recommended procedure for the use of
Plastigage:
1. Remove oil film from surface to be checked. Plas-
tigage is soluble in oil.
2. The total clearance of themain bearingscan only
be determined by removing the weight of the
crankshaft. This can be accomplished by either of
two methods:
PREFERRED METHOD
1. Shimming the bearings adjacent to the bearing to be checked in order to remove the clearance between upper
bearing shell and the crankshaft. Thiscanbeaccomplishedbyplacingaminimum of 0.254 mm (.010 inch) shim
(e. g. cardboard, matchbook cover, etc.) between the bearing shell and thebearing cap on the adjacent bearings
and tighten bolts to 14-20 Nꞏm (10-15 ft.lb.)
When checking No. 1 main bearing. Shim No. 2 main bearing.
When checking No. 2 main bearing. Shim No.1 and No. 3 main bearing.
When checking No.3 main bearing. Shim No. 2 and No. 4 main bearing.
When checking No. 4 main bearing. Shim No. 3 and No. 5 main bearing.
When checking No. 5 main bearing. Shim No. 4 and No. 6 main bearing.
When checking No. 6 main bearing. Shim No. 5 main bearing.
NOTE: Remove all shims before reassembling engine

ALTERNATIVE METHOD
1. With the weight of the crankshaft being supported
by a jack under the counterweight adjacent to the
bearing being checked.
2. Place a piece of Plastigage across the entire width
of the bearing shell in the cap approximately 6.35
mm (1/4 inch) off center and away from the oil
holes. (In addition, suspect areas can be checked
by placing the Plastigage in the suspect area).
Torque the bearing cap bolts of the bearing being
checked to the proper specifications.
3. Remove the bearing cap and compare the width of
the flattened Plastigage with the metric scale pro-
vided on the package. Locate the band closest to the same width. This band shows the amount of clearance in
thousandths of a millimeter. Differences in readings between the ends indicate the amount of taper present.
Record all readings taken. Refer to Engine Specifications.Plastigage generally is accompanied by two
scales. One scale is in inches, the other is a metric scale.
4. Plastigage is available in a variety of clearance ranges. The 0.025-0.076 mm (.001-.003 inch) is usually the most
appropriate for checking engine bearing proper specifications.

CRANKSHAFT
STANDARD PROCEDURE
MEASURING CRANKSHAFT END PLAY
1. Mount a dial indicator to front of engine, locating
probe on nose of crankshaft.
2. Move crankshaft all the way to the rear of its travel.
3. Zero the dial indicator.
4. Move crankshaft all the way to the front and read
the dial indicator. (Referto 9 - ENGINE - SPECIFI-
CATIONS) for crankshaft end-play specifications.
CRANKSHAFT END PLAY CHECK - OPTIONAL
1. Move crankshaft all the way to the rear of its travel using a lever inserted between a main bearing cap and a
crankshaft cheek using care not to damage any bearing surface.Do notloosen main bearing cap.
2. Use a feeler gauge between number 3 thrust bearing and machined crankshaft surface to determine end play.
(Refer to 9 - ENGINE - SPECIFICATIONS) for crankshaft end-play specifications.
CRANKSHAFT JOURNAL MEASUREMENT
The crankshaft journals should be checked for exces-
sive wear, taper and scoring. Limits of taper or out-of-
round on any crankshaft journals should be held to
0.013 mm (0.0005 in.). Journal grinding should not
exceed 0.508 mm (0.020 in.) under the standard jour-
nal diameter. DO NOT grind thrust faces of No. 3 main
bearing. DO NOT nick crank pin or bearing fillets. After
grinding, remove rough edges from crankshaft oil
holes and clean out all passages.
CAUTION: With the forged crankshafts it is impor-
tant that the final paper or cloth polish after any
journal regrind be in the same direction as normal
rotation in the engine.
1. Measure the journal outside diameter as illustrated.
(Refer to 9 - ENGINE - SPECIFICATIONS) for
crankshaft specifications.

REMOVAL
1. Remove engine assembly from vehicle (Refer to 9
- ENGINE - REMOVAL).
2. Mount engine on a suitable repair stand.
3. Remove oil pan (Refer to 9 - ENGINE/LUBRICA-
TION/OIL PAN - REMOVAL).
4. Remove crankshaft rear oil seal retainer (Refer to 9
- ENGINE/ENGINE BLOCK/CRANKSHAFT REAR
OIL SEAL RETAINER - REMOVAL).
5. Remove crankshaft pulley and damper (Refer to 9 -
ENGINE/ENGINE BLOCK/VIBRATION DAMPER -
REMOVAL).
6. Remove timing chain cover (Refer to 9 - ENGINE/
VALVE TIMING/TIMING CHAIN COVER -
REMOVAL).
7. Remove timing chain and crankshaft sprocket.
(Refer to 9 - ENGINE/VALVE TIMING/TIMING
CHAIN AND SPROCKETS - REMOVAL).
8. Remove oil pump pick up tube (2).
9. Remove crankshaft oil scraper (2).

CAUTION: DO NOT use a number stamp or a
punch to mark connecting rods. Damage to con-
necting rod could occur.
10. Inspect connecting rods and connecting rod caps
for cylinder identification(1). Identify them if nec-
essary using a permanent ink or paint marker.
CAUTION: Care must be taken not to damage the
fractured rod and cap joint surfaces, as engine
damage many occur.
NOTE: Do not reuse connecting rod bolts.
11. Remove connecting rod bolts (1) and caps.
12. Main bearing caps are not interchangeable and
should be marked before removal to ensure cor-
rect reassembly.
13. Remove the side main bearing cap bolts and
main bearing cap bolts.
14. Remove the main bearing caps.
15. When removing the crankshaft, it should be lifted
straight out of the engine block. This will prevent
any damage to the engine and crankshaft.

INSPECTION
1. The crankshaft journals should be checked for excessive wear, taper andscoring. Limits of taper or out-of-round
on any crankshaft journals should be held to 0.025 mm (0.001 in.). Journal grinding should not exceed 0.508 mm
(0.020 inch) under the standard journal diameter. DO NOT grind thrust faces of No. 3 main bearing. DO NOT
nick crank pin or bearing fillets. After grinding, remove rough edges fromcrankshaft oil holes and clean out all
passages.
CAUTION: With the forged crankshafts it is important that the final paper or cloth polish after any journal
regrind be in the same direction as normal rotation in the engine.
2. Check and clean all oil holes for blockage and debris.
INSTALLATION
1. Install upper main bearing shells into engine block.
2. Lubricate upper main bearing shells with clean
engine oil.
3. Install the crankshaft.
4. Install lower main bearing shells into main bearing
caps.
5. Install each main bearing cap in proper sequence
and direction (1). Tighten all bolts finger tight.