Connecting Rod Bearings

Complete disassembly and replacement of connecting rod bearings on the 8.3L V10 engine, requiring engine removal, crankshaft removal, and precision measurement and torque procedures.

Warnings

Tools required

Parts

• Connecting rod bearing set (complete, 10 pairs) × 1 — Use OEM specification
• Oil pan gasket × 1 — Use OEM specification
• Valve cover gaskets (left and right) × 2 — Use OEM specification
• Intake manifold gaskets × 1 — Use OEM specification
• Exhaust manifold gaskets × 2 — Use OEM specification
• Oil drain plug crush washer × 1 — Use OEM specification
• Engine oil filter × 1 — Use OEM specification
• Coolant hose clamps (assorted) × 1 — Replace any damaged
• RTV silicone sealant (Mopar approved) × 1 — Use OEM specification
• Engine assembly lube × 1 — Use OEM specification
• Shop towels × 1 — Generic

Fluids

• 0W-40 full synthetic engine oil — 11 qt
• Zerex G-05 HOAT 50/50 coolant — 19 qt

Preparation

1. Park vehicle on level surface and engage parking brake. Place wheel chocks behind rear wheels.
2. Disconnect negative battery cable and isolate from battery post.
3. Allow engine to cool completely (minimum 4 hours after operation).
4. Remove engine cover and any decorative covers from engine bay.
5. Drain engine oil completely and remove oil filter. Drain coolant from radiator and engine block drain plugs.
6. Relieve fuel system pressure by removing fuel pump relay and cranking engine until it stalls.
7. Prepare clean workspace for engine disassembly with organized parts storage and labeling system.
8. Have all new parts and measuring tools ready before beginning disassembly.

Procedure

1. 1

   Remove engine from vehicle
   Disconnect all electrical connectors, fuel lines, coolant hoses, and vacuum lines from engine. Label each connection for reinstallation. Remove air intake system completely. Disconnect throttle cable and cruise control cable if equipped. Unbolt exhaust manifolds from exhaust pipes. Remove transmission bellhousing bolts (transmission remains in vehicle). Disconnect engine ground straps. Attach engine hoist with load leveler to engine lift points. Support engine weight with hoist. Remove engine mount bolts from frame mounts (verify exact bolt count and location for the 2005 Viper 8.3L V10 before removal). Carefully lift engine forward and upward, tilting as necessary to clear firewall and front crossmember. Transfer engine to heavy-duty engine stand and secure with engine stand adapter plate.
2. 2

   Remove external accessories and intake manifold
   With engine on stand, remove alternator, power steering pump, A/C compressor (if equipped), and mounting brackets. Remove serpentine belt tensioner and idler pulleys. Remove valve covers from both cylinder banks. Remove intake manifold bolts and carefully lift intake manifold away from engine. Remove fuel rail and injectors as an assembly if still attached. Set all components aside in organized manner.
3. 3

   Remove oil pan and oil pump
   Rotate engine on stand so oil pan faces upward. Remove all oil pan bolts (note different bolt lengths and locations). Carefully separate oil pan from block using plastic pry points if necessary. Remove oil pan gasket completely and clean all sealing surfaces. Remove oil pump pickup tube mounting bolts and remove pickup tube. Remove oil pump mounting bolts and remove oil pump assembly. Inspect oil pump pickup screen for debris.
4. 4

   Remove timing cover and timing chain
   Remove crankshaft damper/harmonic balancer using appropriate puller (do not hammer). Remove timing cover bolts and remove timing cover. Note timing chain and sprocket alignment marks before removal. Remove timing chain tensioner if equipped. Remove timing chain and the single camshaft sprocket (this is a cam-in-block OHV engine with one camshaft). Inspect timing chain for wear and stretch.
5. 5

   Remove cylinder heads
   Cylinder head removal is NOT required for connecting rod bearing replacement. Rod bearings are serviced from the bottom of the engine through the oil pan opening. Leave cylinder heads installed. Skip head removal and proceed directly to accessing the connecting rods from below.
6. 6

   Mark and organize connecting rod assemblies
   Rotate crankshaft to position cylinder 1 at bottom dead center. Using marking pen or stamps, clearly mark each connecting rod cap and rod body with cylinder number (1-10) and orientation (front of engine). Factory markings should already exist, but verify all are legible. The rod caps must be reinstalled to their original rods in the correct orientation. Take photos of rod and cap alignment before disassembly.
7. 7

   Remove connecting rod caps and pistons
   Starting with cylinder 1, remove the two connecting rod cap bolts. Note that these are torque-to-yield bolts and must be replaced. Carefully remove rod cap and lower bearing shell, keeping them together and labeled. Push the piston and rod assembly upward only enough to clear the crankshaft journal so the upper bearing shell can be removed; do not push the piston fully out of the bore for bearing-only service. Wrap connecting rod bolt threads with tape or rubber hose to prevent cylinder wall damage. Place piston assembly in organized, numbered container. Remove upper bearing shell from rod. Repeat process for all 10 cylinders, maintaining strict organization. Inspect each bearing for wear patterns, scoring, or metal transfer.
8. 8

   Remove crankshaft and main bearing caps
   Remove main bearing cap bolts in sequence (work from center outward). Mark each main cap with position and orientation before removal. Carefully remove main bearing caps using puller if necessary. Support crankshaft weight and carefully lift crankshaft from block. Place crankshaft on V-blocks or support fixture. Remove all main bearing shells from caps and block, keeping them organized by position.
9. 9

   Clean and inspect crankshaft journals
   Thoroughly clean all crankshaft rod journals with solvent and lint-free cloth. Inspect each journal for scoring, grooves, discoloration, or dimensional irregularities. Using outside micrometer, measure each rod journal diameter at multiple points (minimum 3 measurements per journal, rotated 120 degrees). Measure journal taper and out-of-roundness. Factory specification for rod journal diameter, taper, and out-of-round must be VERIFIED against the 2005 Viper 8.3L V10 service manual before measuring; do not rely on an assumed value. Record all measurements. If any journal is out of specification, crankshaft must be reground or replaced.
10. 10

    Clean and inspect connecting rods and cylinder bores
    Clean all connecting rods thoroughly with solvent. Inspect connecting rod small end bushings and large end bores for wear or damage. Using dial bore gauge or inside micrometer, measure connecting rod big end inside diameter. Factory specification is approximately 2.6615-2.6625 inches. Clean cylinder bores and inspect for scoring or ridge wear. Measure cylinder bore diameters if piston ring replacement or cylinder work is planned.
11. 11

    Install crankshaft with main bearings
    Clean engine block main bearing saddles and oil passages thoroughly. Install new main bearing shells into block, ensuring tang is seated in notch and bearing does not protrude beyond parting line. Apply thin coat of engine assembly lube to bearing surfaces. Carefully lower crankshaft into position on main bearings. Install upper main bearing shells into caps with assembly lube. Install main bearing caps in correct positions and orientations. Install main cap bolts and torque to specification in sequence (center to ends). Verify crankshaft rotates freely with no binding. Measure crankshaft endplay with dial indicator (specification typically 0.004-0.012 inch).
12. 12

    Install new connecting rod bearings
    Remove protective wrap from connecting rod bolts on first piston assembly. Install new upper bearing shell into connecting rod, ensuring tang engages notch and oil hole aligns with rod oil passage. Install new lower bearing shell into rod cap, ensuring proper tang engagement. Apply thin coat of engine assembly lube to both bearing surfaces. Do not allow any dirt or debris to contact bearing surfaces.
13. 13

    Check bearing clearances with Plastigage
    Place strip of Plastigage lengthwise across rod journal on crankshaft. Install connecting rod cap onto rod (without lubrication on bearing for this check). Install new connecting rod bolts and tighten to the factory-specified initial torque (VERIFY against 2005 Viper 8.3L V10 service manual before proceeding) - do NOT perform angle tightening yet. Remove cap carefully without rotating crankshaft. Measure width of flattened Plastigage using scale on Plastigage envelope. Specified clearance is typically 0.0008-0.0020 inch for rod bearings. If clearance is not within specification, determine cause (journal diameter, bearing size, bearing crush) before proceeding. Clean Plastigage material completely from bearing and journal. Repeat clearance check for all rod positions.
14. 14

    Install pistons and connecting rods with final bearing installation
    Once all clearances are verified, remove all rod caps. Apply fresh coat of engine assembly lube to rod bearings and crankshaft journals. Starting with cylinder 1, position piston ring gaps per factory specification (typically staggered 120 degrees). Install piston ring compressor over piston. Insert connecting rod into cylinder from top, guiding rod bolts with protective covers. Carefully tap piston into bore with wooden handle while supporting rod to prevent bolt damage to cylinder wall. Guide connecting rod onto crankshaft journal, aligning rod cap marks. Install lubricated lower bearing into cap. Position cap onto rod in correct orientation, matching marks made during disassembly. Install new connecting rod bolts (TTY - do not reuse). Hand-tighten both bolts. Repeat installation for all 10 cylinders.
    Torque spec

    Connecting Rod Bolts45 Nm (33 lb-ft)
15. 15

    Torque connecting rod bolts to specification
    Working on one rod at a time, torque both connecting rod bolts to the factory initial torque in even steps, then rotate each bolt the factory-specified additional angle in one smooth motion (VERIFY exact torque and angle against 2005 Viper 8.3L V10 service data before assembly). This completes the torque-to-yield procedure. Do not exceed 90 degrees of rotation. After torquing, verify rod cap is seated flush against rod with no gaps. Check that connecting rod has side clearance on crankshaft journal (typical specification 0.006-0.014 inch). Rotate crankshaft after each rod installation to verify smooth rotation. Repeat torque procedure for all 10 connecting rods.
    Torque spec

    Connecting Rod Bolts45 Nm (33 lb-ft)
16. 16

    Reinstall oil pump and oil pan
    Install oil pump with new gasket, aligning drive gear with crankshaft. Torque oil pump mounting bolts per specification. Install oil pump pickup tube with new O-ring, ensuring proper depth and clearance from oil pan floor. Apply thin bead of RTV silicone to oil pan rail where end seals meet block. Install new oil pan gasket, using gasket adhesive to hold in position. Position oil pan onto block, aligning all bolt holes. Install oil pan bolts in the factory sequence and torque to the specified value for the 2005 Viper 8.3L V10 (VERIFY torque and bolt pattern against service data).
    Torque spec

    Oil Pan Bolt12 Nm (9 lb-ft)
17. 17

    Reinstall cylinder heads
    Clean cylinder head and block mating surfaces thoroughly. Inspect for warpage using straightedge. Install new head gaskets with alignment dowels. Carefully position cylinder heads onto block. Install cylinder head bolts with light oil on threads. Torque head bolts in proper sequence (center outward) per factory specification. This typically involves multiple stages with final torque-to-yield angle tightening.
18. 18

    Reinstall timing components
    Install camshaft sprockets and timing chain with alignment marks properly positioned. Install timing chain tensioner. Verify valve timing marks alignment by rotating crankshaft two complete revolutions. Install timing cover with new gasket. Install crankshaft harmonic balancer, torquing center bolt per specification. Ensure balancer is fully seated on crankshaft nose.
19. 19

    Reinstall intake manifold and valve covers
    Install new intake manifold gaskets on cylinder heads. Position intake manifold and install mounting bolts. Torque intake manifold bolts in proper sequence. Install new valve cover gaskets. Install valve covers and torque bolts to specification evenly. Reinstall all external accessories: alternator, power steering pump, A/C compressor, and brackets. Install serpentine belt routing.
20. 20

    Reinstall engine into vehicle
    Remove engine from stand and attach to engine hoist with load leveler. Carefully lower engine into engine bay, aligning with transmission bellhousing and engine mounts. Install transmission bellhousing bolts and torque to specification. Install engine mount bolts and torque to specification. Reconnect all electrical connectors, fuel lines, coolant hoses, vacuum lines, throttle cable, and ground straps per removal labels. Bolt exhaust manifolds to exhaust pipes with new gaskets. Reinstall air intake system and all remaining components.
21. 21

    Install new oil filter and fill fluids
    Install new oil filter, lubricating gasket with clean oil. Install oil drain plug with new crush washer and torque to the factory specification for the 2005 Viper 8.3L V10 (VERIFY value; typical drain plug torque is lower than 26 lb-ft). Fill engine with the factory-specified oil capacity and viscosity for the 2005 Viper 8.3L V10 (VERIFY capacity and recommended grade against factory documentation before filling). Fill cooling system with the factory-specified coolant capacity of HOAT (Mopar 5-year/100,000-mile equivalent, e.g., Zerex G-05) 50/50 mix (VERIFY total system capacity against 2005 Viper 8.3L V10 service data). Check all other fluid levels (power steering, brake fluid).
    Torque spec

    Oil Drain Plug35 Nm (26 lb-ft)
22. 22

    Initial startup and break-in procedure
    Reconnect negative battery cable. Prime oil system by cranking engine with fuel pump relay removed and spark plugs removed until oil pressure gauge shows pressure. Reinstall spark plugs and fuel pump relay. Start engine and verify immediate oil pressure (should reach 20+ psi within seconds). Start engine and verify immediate oil pressure, then allow it to idle and reach operating temperature while monitoring for leaks, unusual noises, or warning lights. A sustained high-RPM cam break-in is not required for connecting rod bearing replacement. Check for oil leaks around pan, valve covers, and all connections. After initial break-in, allow engine to cool, then recheck all fluid levels and torque specifications on external accessories.

Reassembly

1. Reassembly is detailed in steps 11-22, following reverse order of disassembly with specific torque sequences and clearance checks.
2. All torque-to-yield fasteners (connecting rod bolts) must be replaced with new parts - never reuse TTY bolts.
3. Bearing clearances must be verified before final assembly - do not skip Plastigage checks.
4. Maintain absolute cleanliness during bearing installation - a single particle of dirt can destroy bearings.
5. Follow break-in procedure exactly as specified to ensure proper bearing seating and longevity.

Verification

• Verify oil pressure reaches factory specification (typically 25-80 psi at operating temperature depending on RPM) immediately upon startup.
• Listen for unusual bearing noise (knocking, rattling) during initial startup and break-in period. Any metallic knocking indicates bearing problem.
• Check for oil leaks around oil pan, valve covers, timing cover, and all gasket surfaces after break-in.
• Monitor engine temperature during break-in to ensure proper cooling system operation.
• After 500 miles, change oil and filter, then inspect magnetic drain plug for metal particles. Excessive metal indicates bearing wear.
• Verify connecting rod bolt torque and angle were performed correctly by reviewing installation documentation.
• Confirm smooth crankshaft rotation with no binding throughout complete rotation cycle.

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