90K Service

Complete 90,000-mile scheduled maintenance service for 2008 Dodge Viper with 8.4L V10 engine, including fluid changes, filter replacements, and comprehensive inspection of critical systems.

Warnings

Tools required

Parts

• Engine oil filter × 1 — Mopar 5281090 or equivalent
• Cabin air filter (if equipped) × 1 — Check vehicle configuration
• Engine air filter × 1 — Mopar 5037455AA or equivalent
• Spark plugs (set of 10) × 10 — NGK LZKAR7A or equivalent platinum plugs
• Drain plug washer (differential) × 1 — Use OEM specification
• Drain plug washer (transmission) × 1 — Use OEM specification

Fluids

• 0W-40 full synthetic engine oil — 11 qt
• 75W-90 synthetic gear oil (rear differential) — 2.75 qt
• Pennzoil Synchromesh 75W-90 (manual transmission) — 4.2 qt
• Mopar HOAT coolant 50/50 — 1 qt
• DOT 4 brake fluid — 0.5 qt
• Mopar ATF+4 power steering fluid — 0.25 qt

Preparation

1. Park vehicle on level surface and engage parking brake.
2. Allow engine, exhaust, and drivetrain components to cool completely (minimum 2 hours after operation).
3. Gather all fluids, filters, and tools before beginning work.
4. Verify you have the correct spark plug part number for your specific model year (consult owner's manual or dealer).
5. Raise vehicle using floor jack at specified jacking points and support securely on jack stands at all four corners.
6. Remove all four wheels to access brake components for inspection.

Procedure

1. 1

   Drain engine oil
   Locate oil drain plug on bottom of engine oil pan. Position large drain pan underneath. Remove drain plug and allow oil to drain completely (approximately 10-15 minutes). Inspect drain plug threads and washer for damage. Reinstall drain plug once draining is complete. Note: The 8.4L V10 holds approximately 10 quarts with filter, so ensure drain pan has adequate capacity. Verify exact capacity in the factory service manual.
2. 2

   Replace engine oil filter
   Locate oil filter on driver's side of engine block. Using oil filter wrench, remove old filter by turning counterclockwise. Verify old filter gasket came off with filter. Clean filter mounting surface on engine block. Apply thin film of fresh oil to new filter gasket. Hand-tighten new filter until gasket contacts mounting surface, then rotate an additional 3/4 turn. Do not over-tighten.
3. 3

   Refill engine oil
   Remove oil filler cap on top of engine. Using funnel, add approximately 9.5 quarts of 0W-40 full synthetic oil. Replace filler cap. Start engine and allow to run for 30 seconds, then shut off. Wait 5 minutes for oil to settle. Check dipstick and add remaining oil to bring level to full mark (typically 0.5 quart additional, for a total of approximately 10 quarts). Do not overfill. Verify no leaks at drain plug or filter.
4. 4

   Drain and refill rear differential
   Locate differential drain plug on bottom of rear differential housing. Position drain pan underneath. Remove drain plug and drain fluid completely. Locate fill plug on driver's side of differential housing (higher than drain plug). Remove fill plug. Reinstall drain plug with new washer. Using gear oil pump, fill differential with the factory-specified quantity of 75W-90 synthetic gear oil (verify capacity and any required limited-slip friction modifier in the service manual) until fluid reaches bottom of fill plug hole. Reinstall fill plug.
5. 5

   Drain and refill manual transmission
   Locate transmission drain plug on bottom of transmission housing. Position drain pan underneath. Remove drain plug and drain fluid completely. Locate fill plug on side of transmission case. Remove fill plug. Reinstall drain plug with new washer. Using gear oil pump, fill transmission with the factory-specified manual transmission fluid and quantity (verify exact fluid type and capacity for the Tremec T56 in the service manual) until fluid reaches bottom of fill plug hole. Reinstall fill plug.
6. 6

   Replace engine air filter
   Open hood and locate air filter housing on driver's side of engine bay. Release the housing clamps or fasteners (typically 4 clips on the Viper air box). Lift housing cover and remove old air filter element. Inspect housing interior for debris and clean if necessary. Install new air filter element, ensuring it seats properly in housing. Secure housing cover with all clamps or fasteners.
7. 7

   Inspect and replace spark plugs
   Remove engine cover if equipped. Locate all 10 individual ignition coils, one per cylinder (5 per cylinder bank), positioned over each spark plug along both cylinder heads. Disconnect electrical connector from each coil pack. Remove the coil pack mounting bolt from each position and remove coil packs. Using spark plug socket with extension, remove all 10 spark plugs. Inspect old plugs for wear, fouling, or abnormal deposits. Gap new spark plugs to the factory specification (check with feeler gauge - verify exact gap in the factory service manual before installation). Check spark plug manufacturer guidance regarding anti-seize; many plugs with plated threads should be installed dry to avoid over-torquing in aluminum heads. Install new plugs and hand-tighten, then torque to specification. Reinstall coil packs and reconnect electrical connectors.
8. 8

   Inspect brake system
   With wheels removed, inspect brake pads on all four corners for remaining thickness (minimum 3mm required). Inspect brake rotors for scoring, grooves, or excessive wear. Check brake calipers for fluid leaks around piston seals. Inspect brake lines and hoses for cracks, chafing, or fluid seepage. Verify brake pad wear sensors are intact if equipped.
9. 9

   Flush and bleed brake fluid
   Locate brake fluid reservoir in engine bay (typically on driver's side firewall). Using turkey baster or fluid extractor, remove old brake fluid from reservoir. Refill with fresh DOT 4 brake fluid. Starting at wheel furthest from master cylinder (typically right rear), attach bleeder hose to bleeder valve. Have assistant pump brake pedal 3-4 times and hold. Open bleeder valve briefly to release old fluid, then close. Repeat until fluid runs clear. Move to next furthest wheel and repeat process for all four wheels. Top off reservoir to MAX line with fresh DOT 4 fluid. Verify firm brake pedal feel.
10. 10

    Inspect cooling system and top off coolant
    Ensure engine is completely cool. Visually inspect all coolant hoses for cracks, soft spots, or swelling. Check hose clamps for tightness. Inspect radiator for leaks or damage. Check coolant reservoir level - should be at COLD FULL mark when engine is cold. If low, add Mopar HOAT coolant 50/50 mixture to bring to proper level. Do not overfill. Inspect coolant condition - should be bright color without contamination.
11. 11

    Check power steering fluid
    Locate power steering fluid reservoir (typically on driver's side of engine bay). Check fluid level with engine cold - should be between MIN and MAX marks. If low, add the factory-specified power steering fluid (verify whether Mopar ATF+4 or a dedicated PS fluid is required for this model) to bring to MAX mark. Inspect power steering hoses and pump for leaks. Start engine and turn steering wheel lock-to-lock twice, then recheck level and top off if necessary.
12. 12

    Inspect suspension and steering components
    With vehicle raised, inspect front and rear suspension components. Check ball joints for excessive play or torn boots. Inspect tie rod ends for looseness or damaged boots. Check shock absorbers for fluid leaks. Inspect sway bar bushings and end links for wear. Check all rubber suspension bushings for cracking or deterioration. Verify all fasteners are tight.
13. 13

    Inspect belts and hoses
    Visually inspect serpentine drive belt for cracks, fraying, glazing, or chunking. Check belt tension - should have minimal deflection when pressed. Inspect all engine hoses (coolant, vacuum, PCV) for cracks, hardening, or deterioration. Check hose clamps for tightness. Look for any signs of fluid leaks around hose connections.
14. 14

    Inspect tires and adjust pressure
    Inspect all four tires for tread depth (minimum 3/32 inch), uneven wear patterns, cracks, bulges, or embedded objects. Check tire pressure when cold and adjust to specification listed on driver's door jamb placard (typically 29-32 PSI for Viper, but verify for your specific model). Inspect wheels for cracks or damage.
15. 15

    Reinstall wheels and perform final checks
    Reinstall all four wheels, hand-tightening lug nuts in star pattern. Lower vehicle to ground. Torque lug nuts to the factory specification in a star pattern (verify exact lug nut torque in the owner's manual or service manual). Reset maintenance reminder if equipped. Document all service performed and fluid quantities used. Test drive vehicle to verify proper operation of all systems.

Reassembly

1. Reinstall wheels and torque lug nuts to specification in star pattern after lowering vehicle.
2. Ensure all fluid fill caps and dipsticks are properly secured.
3. Verify no tools or materials were left in engine bay.
4. Double-check for any fluid leaks around drain plugs, filters, and fill locations before test drive.

Verification

• Start engine and verify no warning lights on instrument cluster.
• Check for leaks under vehicle at all drain plug and filter locations.
• Verify oil pressure gauge reads normal operating range.
• Verify engine oil level on dipstick is at FULL mark when engine is warm.
• Test drive vehicle for 10-15 minutes, checking for smooth operation, proper shifting, normal operating temperature, and firm brake pedal feel.
• After test drive, recheck all fluid levels and inspect for any new leaks.
• Verify brake pedal is firm and does not sink when held under pressure.
• Confirm no unusual noises from engine, transmission, or differential.

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