2006 DODGE RAM SRT-10 Crankshaft

BLOCK-ENGINE
DESCRIPTION
The cylinder block is made of cast iron.The block is a closed deck design with the left bank forward. To provide
high rigidity and improved NVH an enhanced compacted graphite bedplate isbolted to the block. The block design
allows coolant flow between the cylinders bores, and an internal coolant bypass to a single poppet inlet thermostat
is included in the cast aluminum front cover.
STANDARD PROCEDURE - CYLINDER BORE HONING
Before honing, stuff plenty of clean shop towels under
the bores and over the crankshaft to keep abrasive
materials from entering the crankshaft area.
1. Used carefully, the Cylinder Bore Sizing Hone
C-823, equipped with 220 grit stones, is the best
tool for this job. In addition to deglazing, it will
reduce taper and out-of-round, as well as removing
light scuffing, scoring and scratches. Usually, a few
strokes will clean up a bore and maintain the
required limits.
CAUTION: DO NOT use rigid type hones to remove
cylinder wall glaze.
2. Deglazing of the cylinder walls may be done if the
cylinder bore is straight and round. Use a cylinder
surfacing hone, Honing Tool C-3501, equipped with
280 grit stones (C-3501-3810). about 20-60
strokes, depending on the bore condition, will be
sufficient to provide a satisfactory surface. Using
honing oil C-3501-3880, or a light honing oil, avail-
able from major oil distributors.
CAUTION: DO NOT use engine or transmission oil, mineral spirits, or kerosene.
3. Honing should be done by moving the hone up and down fast enough to get a crosshatch pattern (1). The hone
marks should INTERSECT at 50° to 60° for proper seating of rings (2).
4. A controlled hone motor speed between 200 and 300 RPM is necessary to obtain the proper crosshatch angle.
The number of up and down strokes per minute can be regulated to get the desired 50° to 60° angle. Faster up
and down strokes increase the crosshatch angle.
5. After honing, it is necessary that the block be cleaned to remove all traces of abrasive. Use a brush to wash
parts with a solution of hot water and detergent. Dry parts thoroughly. Usea clean, white, lint-free cloth to check
that the bore is clean. Oil the bores after cleaning to prevent rusting.
CLEANING
Thoroughly clean the oil pan and engine block gasket surfaces.
Use compressed air to clean out:
The galley at the oil filter adaptor hole.
The front and rear oil galley holes.
The feed holes for the crankshaft main bearings.
Once the block has been completely cleaned, apply Loctite PST pipe sealantwith Teflon 592 to the threads of the
front and rear oil galley plugs. Tighten the 1/4 inch NPT plugs to 20 Nꞏm (177in. lbs.) torque. Tighten the 3/8 inch
NPT plugs to 27 Nꞏm (240 in. lbs.) torque.

CRANKSHAFT
DESCRIPTION
The crankshaft (1) is constructed of nodular cast iron.
The crankshaft is a three throw split pin design with
six counterweights for balancing purposes. The crank-
shaft is supported by four select fit main bearings with
the No. 2 serving as the thrust washer location. The
main journals of the crankshaft are cross drilled to
improve rod bearing lubrication. The No. 6 counter-
weight has provisions for crankshaft position sensor
target wheel (2) mounting. The select fit main bearing
markings are located on the rear side of the target
wheel. The crankshaft oil seals are one piece design.
The front oil seal is retained in the timing chain cover,
and the rear seal is pressed in to a bore formed by
the cylinder block and the bedplate assembly.

REMOVAL
NOTE: To remove the crankshaft from the engine, the engine must be removed from the vehicle.
1. Remove the engine (Refer to 9 - ENGINE - REMOVAL).
2. Remove the engine oil pump (Refer to 9- ENGINE/LUBRICATION/OIL PUMP - REMOVAL).
CAUTION: DO NOT pry on the oil pan gasket when removing the oil pan, The oil pan gasket is mounted to
the cylinder block in three locations and will remain attached to block when removing oil pan. Gasket can
not be removed with oil pan.
3. Remove the bedplate mounting bolts. Note the location of the two stud bolts for installation.
4. Remove the connecting rods from the crankshaft.
CAUTION: The bedplate to cylinder block mating surface is a critical sealing surface. Do not pry on or dam-
age this surface in anyway.
NOTE: The bedplate contains the lower main bearing halves. Use care when handling bedplate as not to
drop or damage bearing halves. Installing main bearing halves in the wrongposition will cause severe dam-
age to the crankshaft.
NOTE: The bedplate has pry points cast into it. Use these points only. The pry points are shown below.
5. Carefully pry on the pry points to loosen the bedplate then remove the bedplate.
CAUTION: When removing the crankshaft, use care not to damage bearing surfaces on the crankshaft.
6. Remove the crankshaft.
7. Remove the crankshaft tone wheel.

INSPECTION
NOTE: Thoroughly inspect the connecting rod bearing bores and main bearing bores for scoring, blueing or
severe scratches. Further disassembly may be required.
If connecting rod bearing bores show damage, the cylinder heads must be removed to service the piston and rod
assemblies. If the bedplate or the cylinder block main bearing bores show damage the engine must be replaced.
1. If required, remove the main bearing halves from the cylinder block and bedplate.
2. Thoroughly clean the bedplate to cylinder block sealing surfaces and main bearing bores. Remove all oil and
sealant residue.
3. Inspect the bedplate main bearing bores for cracks, scoring or severe blueing. If either condition exists the
engine must be replaced.
4. Inspect the crankshaft thrust washers for scoring, scratches, wear or blueing. If either condition exist replace the
thrust washers.
5. Inspect the oil pan gasket/windage tray for splits, tears or cracks in the gasket sealing surfaces. Replace gasket
as necessary.
INSTALLATION
CAUTION: Main bearings are select fit. Refer to
Crankshaft Main Bearings in this section for
proper bearing selections.
CAUTION: When installing crankshaft, use care
not to damage bearing surfaces on the crankshaft.
NOTE: Apply sealant to the tone wheel retaining
screws prior to installation.
1. Lubricate upper main bearing halves with clean
engine oil.
2. Install the crankshaft tone wheel. Torque the
mountingscrewsto15Nꞏm(11ft.lbs.).
3. Position crankshaft in cylinder block.
4. Install the thrust washers (1).

CAUTION: The bedplate to cylinder block mating
surface must be coated with Mopar
Engine RTV
sealant prior to installation. Failure to do so will
cause severe oil leaks.
NOTE: Make sure that the bedplate and cylinder
block sealing surfaces are clean and free of oil or
other contaminants. Contaminants on the sealing
surfaces may cause main bearing distortion and/or
oil leaks.
5. Apply a 2.5mm (0.100 inch) bead of Mopar
Engine RTV sealant to the cylinder block-to-bed-
plate mating surface (2,3) as shown.
6. Coat the crankshaft main bearing journals with clean engine oil and position the bedplate onto the cylinder block.
NOTE: Lubricate the bedplate retaining bolts with clean engine oil prior to installation.
7. Install the bedplate retaining bolts, making sure to place the stud bolts in the correct location, Torque the bolts in
the sequence shown.
Hand tighten bolts1D,1G and 1Funtil the bedplate contacts the block.
Tighten bolts1A - 1Jto 54 Nꞏm (40 ft. lbs.)
Tighten bolts1-8to 7 Nꞏm (5 ft. lbs.)

Turn bolts1-8an additional 90°.
Tighten boltsA-E27 Nꞏm ( 20 ft. lbs.).
8. Measure crankshaft end play.
9. Install the connecting rods and measure side clearance (Refer to 9 - ENGINE/ENGINE BLOCK/PISTON & CON-
NECTING ROD - STANDARD PROCEDURE).
10. Install oil pump (Refer to 9 - ENGINE/LUBRICATION/OIL PUMP - INSTALLATION).
11. Install the engine (Refer to 9 - ENGINE - INSTALLATION).

BEARINGS-CRANKSHAFT MAIN
STANDARD PROCEDURE
MAIN BEARING FITTING
SELECT FIT IDENTIFICATION
The main bearings are “select fit” to achieve proper oil
clearances. For main bearing selection, the crankshaft
position sensor target wheel (2) has grade identifica-
tion marks stamped into it. These marks are read from
left to right, corresponding with journal number 1, 2, 3,
4. The crankshaft position sensor target wheel is
mounted to the number 6 counter weight (1) on the
crankshaft.
INSPECTION
Wipe the inserts clean and inspect for abnormal wear patterns and for metalor other foreign material imbedded in
the lining. Normal main bearing insert wear patterns are illustrated.
Inspect the back of the inserts for fractures, scrapings or irregular wearpatterns.
Inspect the upper insert locking tabs for damage.
Replace all damaged or worn bearing inserts.
MAIN BEARING JOURNAL DIAMETER (CRANKSHAFT REMOVED)
Remove the crankshaft from the cylinder block (Refer to 9 - ENGINE/ENGINE BLOCK/CRANKSHAFT - REMOVAL).
Clean the oil off the main bearing journal.
Determine the maximum diameter of the journal with a micrometer. Measure at two locations 90° apart at each end
of the journal.
The maximum allowable taper is 0.008mm (0.0004 inch.) and maximum out of round is 0.005mm (0.002 inch). Com-
pare the measured diameter with the journal diameter specification (MainBearing Fitting Chart). Select inserts
required to obtain the specified bearing-to-journal clearance.
Install the crankshaft into the cylinder block (Refer to 9 - ENGINE/ENGINEBLOCK/CRANKSHAFT - INSPECTION).
Check crankshaft end play.
CRANKSHAFT MAIN BEARING SELECTION

Crankshaft Marking JOURNAL SIZE
SIZE mm (in.)
RSize 63.488 - 63.496 mm
(2.4995 - 2.4998 in.)
SSize 63.496 - 63.500 mm (2.4998 - 2.4999 in.)
TSize 63.500 - 63.504 mm (2.4999 - 2.501 in.)
USize 63.504 - 63.512 mm (2.5001 - 2.5004 in.)
Bearing size
Bearing Code Size Application
Upper Bearing
A.2.443 - 2.447 mm Use with crankshaft size
R
(.0961 - .0963 in.)
B2.439 - 2.443 mm Use with crankshaft
S, T
(0.960 - .0961 in.)
C2.435 - 2.439 mm Use with crankshaft
U
(.0958 - .0960 in.)
Lower Bearing Main
1and4
12.441 - 2.447 mm Use with crankshaftR, S
(.0961 -.0963 in.)
22.435 - 2.441 mm Use with crankshaftT, U
(.0958 - .0962 in.)
Lower Main Bearing
2and3
32.429 - 2.435 mm Use with crankshaftR, S
(.0956 - .0958 in.)
42.423 - 2.429 mm Use with crankshaftT, U
(.0953 - .0956 in.)
Bearing Clearances
Main
1, 4
CrankshaftR.004 - .034 mm ( .00015 - .0013 in.)
Crankshaft
S.004 - .030 mm ( .00015 - .0011 in.)
Crankshaft
T.006 - .032 mm (.0002 - .0012 in.)
Crankshaft
U.002 - .032 mm (.00007 -. 0012 in.)
Main
2, 3
CrankshaftR.016 - .046 mm (.0006 - .0018 in.)
Crankshaft
S.016 - .042 mm (.00062 - .016 in.)
Crankshaft
T.018 - .044 mm (.0007 - .0017 in.)
Crankshaft
U.014 - .044 mm (.0005 - .0017 in.)
1. Service main bearings are available in four grades. The chart identifies the four service grades available.