Tune-Up - Major

Complete major tune-up for the 2005 Dodge Viper 8.3L V10, including spark plugs, ignition coils, fuel filter, air filter, PCV valve, engine oil and filter change, coolant flush, transmission fluid service, differential fluid service, and throttle body cleaning.

Warnings

Tools required

Parts

• Spark plugs (Champion RC12YC or equivalent) × 10 — Use OEM specification
• Engine oil filter × 1 — Mopar 5281090
• Air filter element × 1 — Use OEM specification
• Fuel filter × 1 — Use OEM specification
• PCV valve × 1 — Use OEM specification
• Oil drain plug crush washer × 1 — Use OEM specification
• Coolant drain plug O-ring × 1 — Use OEM specification
• Differential drain plug washer × 1 — Use OEM specification
• Differential fill plug washer × 1 — Use OEM specification
• Transmission drain plug washer × 1 — Use OEM specification

Fluids

• 0W-40 full synthetic engine oil — 11 qt
• Zerex G-05 HOAT 50/50 coolant — 19 qt
• 75W-90 synthetic GL-4 manual transmission fluid — 4 qt
• 75W-140 synthetic GL-5 rear differential fluid — 2.75 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Allow engine and exhaust system to cool completely (minimum 2 hours)
3. Gather all tools, parts, and fluids before beginning
4. Prepare fluid catch containers and disposal arrangements
5. Disconnect negative battery cable to prevent accidental starter engagement
6. Raise vehicle safely and support on jack stands at all four corners
7. Remove engine cover by releasing retaining clips

Procedure

1. 1

   Drain Engine Oil
   Place drain pan under oil pan. Locate oil drain plug on bottom of oil pan. Remove drain plug and allow oil to fully drain (approximately 15 minutes due to large sump capacity). Inspect drain plug threads and sealing surface. Install new crush washer on drain plug. Reinstall drain plug and torque to specification.
   Torque spec

   Oil Drain Plug35 Nm (26 lb-ft)
2. 2

   Replace Oil Filter
   Locate oil filter on driver side of engine block. Position drain pan under filter. Use oil filter wrench to remove old filter by turning counterclockwise. Clean filter mounting surface on engine block. Apply thin film of clean engine oil to new filter gasket. Install new filter hand-tight, then tighten an additional 3/4 turn.
3. 3

   Drain and Refill Coolant
   Remove radiator cap. Locate coolant drain plug at bottom of radiator on passenger side. Place drain pan under radiator and remove drain plug. Allow coolant to drain completely. Remove coolant reservoir cap and inspect reservoir for debris. Flush system with water if coolant appears contaminated. Install drain plug with new O-ring. Fill system with OEM-specified coolant capacity (verify against 2005 Viper service manual) of Zerex G-05 HOAT 50/50 coolant through radiator opening and reservoir. Start engine and allow to reach operating temperature with radiator cap off. Add coolant as level drops during burping process. Install radiator cap when system is fully burped and topped off.
   ⚠Do not open cooling system on a hot engine. System operates at up to 18 psi and can cause severe burns.
4. 4

   Service Manual Transmission
   Locate transmission fill plug on passenger side of transmission and drain plug on bottom of transmission case. Remove fill plug first to verify access. Place drain pan under transmission. Remove drain plug and allow fluid to drain completely. Clean magnetic drain plug of metal particles (normal wear debris). Install drain plug with new washer. Using fluid transfer pump, fill transmission through fill hole with OEM-specified manual transmission fluid and capacity (verify against 2005 Viper service manual) until fluid begins to seep from fill hole. Install fill plug with new washer and torque to specification.
5. 5

   Service Rear Differential
   Locate differential fill plug on front face of differential housing and drain plug on bottom of differential case. Remove fill plug first. Place drain pan under differential. Remove drain plug and allow fluid to drain completely (approximately 10 minutes). Clean magnetic drain plug of metal particles. Install drain plug with new washer and torque to specification. Using fluid transfer pump, fill differential through fill hole with 2.75 quarts of 75W-140 synthetic GL-5 fluid until fluid reaches bottom of fill hole. Install fill plug with new washer and torque to specification.
6. 6

   Replace Spark Plugs
   Locate all 10 spark plug boots on top of engine (5 per cylinder bank). Carefully twist and pull each spark plug boot to disconnect from spark plug. Remove spark plugs using 5/8-inch spark plug socket, keeping track of cylinder position. Inspect spark plug electrodes and porcelain for wear, deposits, or damage. Gap new spark plugs to OEM specification (verify against 2005 Viper service manual) using gap gauge. Apply small amount of anti-seize compound to spark plug threads (avoid getting compound on electrodes). Hand-thread new spark plugs to avoid cross-threading. Torque spark plugs to OEM specification (verify against 2005 Viper service manual). lb-ft. Apply dielectric grease inside spark plug boots before reconnecting to new spark plugs.
   ⚠Do not over-torque spark plugs in aluminum heads. Over-torquing can strip threads and require expensive head repair.
7. 7

   Inspect Ignition Coils
   With spark plug boots removed, visually inspect all 10 ignition coils for cracks, carbon tracking, or oil contamination. Check electrical connectors for corrosion or damage. Remove any coils showing signs of failure by disconnecting electrical connector and removing mounting bolt. Install replacement coils if needed using new mounting bolts torqued to specification. Clean coil mounting surfaces before installation.
8. 8

   Replace Air Filter
   Locate air filter housing on driver side of engine bay. Release air box clips securing air filter housing cover. Lift cover and remove old air filter element. Inspect housing for debris, insects, or water contamination. Clean housing interior with damp cloth if needed. Install new air filter element, ensuring proper seating in housing. Reinstall air box cover and secure with clips.
   Torque spec

   Air Box Clips5 Nm (4 lb-ft)
9. 9

   Replace Fuel Filter
   Relieve fuel system pressure by removing fuel pump relay from power distribution center and cranking engine until it stalls. Note: The 2005 Viper uses an in-tank fuel filter integrated with the fuel pump module; verify whether a serviceable inline fuel filter exists before proceeding. If integrated, filter service requires fuel pump module removal. Place shop towels around fuel filter to catch residual fuel. Using line disconnect tools, disconnect fuel lines from both ends of fuel filter. Note fuel flow direction arrow on old filter. Remove fuel filter from mounting bracket. Install new fuel filter in mounting bracket with arrow pointing toward engine. Connect fuel lines to new filter, ensuring connections click fully into place. Reinstall fuel pump relay. Cycle ignition key to ON position 3-4 times without starting to reprime fuel system. Check for fuel leaks around filter connections.
   ⚠️Fuel system operates under pressure. Failure to relieve pressure can result in fuel spray and fire hazard. Work in well-ventilated area away from ignition sources.
10. 10

    Replace PCV Valve
    Locate PCV valve on driver side valve cover, connected to intake manifold via vacuum hose. Disconnect vacuum hose from PCV valve. Twist and pull PCV valve from valve cover grommet. Inspect valve cover grommet for cracks or deterioration; replace if damaged. Install new PCV valve into grommet, ensuring firm seating. Reconnect vacuum hose to PCV valve.
11. 11

    Clean Throttle Body
    Locate throttle body on intake manifold. Disconnect air intake duct from throttle body by loosening hose clamp. Using throttle body cleaner spray and clean shop towel, clean throttle plate and bore. Open throttle plate by hand to access both sides. Do not force throttle plate excessively. Allow cleaner to evaporate completely before reconnecting air duct. Tighten air duct hose clamp securely.
    ℹ️Do not use carburetor cleaner on throttle body as it can damage throttle position sensor coating. Use only throttle body-specific cleaner.
12. 12

    Fill Engine Oil and Final Checks
    Lower vehicle from jack stands. Remove oil fill cap on driver side valve cover. Using funnel, pour OEM-specified oil capacity (verify against 2005 Viper service manual, approximately 8 quarts) of 0W-40 full synthetic oil into engine. Install oil fill cap. Start engine and allow to idle for 2 minutes. Check for oil leaks around filter and drain plug. Shut off engine and wait 5 minutes for oil to drain to pan. Check oil level on dipstick and add remaining oil to reach full mark (approximately 1 quart). Reinstall engine cover. Reconnect negative battery cable.

Reassembly

1. Verify all drain plugs, fill plugs, and filters are properly installed and torqued
2. Confirm all fluid levels are correct and no leaks are present
3. Ensure all electrical connections to ignition coils are properly seated
4. Verify spark plug boots are fully seated on all spark plugs
5. Reinstall engine cover and secure all retaining clips
6. Reconnect negative battery cable

Verification

• Start engine and verify smooth idle with no misfires or rough running
• Check for oil leaks around oil filter and drain plug after 5 minutes of runtime
• Verify coolant level is stable after engine reaches operating temperature
• Check for fuel leaks around fuel filter connections
• Test drive vehicle to verify proper operation under load
• Re-check all fluid levels after test drive and top off if necessary
• Monitor engine temperature gauge during test drive to verify proper cooling system operation
• Verify no warning lights are illuminated on instrument cluster

More procedures for this vehicle