Timing Chain

Complete replacement of the timing chain, sprockets, guides, and tensioners on the 1992 Dodge Viper 8.0L V10, requiring removal of the front timing cover and proper engine timing alignment.

Warnings

Tools required

Parts

• Timing chain kit (includes chain, guides, tensioners) × 1 — Use OEM specification
• Camshaft sprockets (set of 2) × 1 — Use OEM specification
• Crankshaft sprocket × 1 — Use OEM specification
• Timing cover gasket × 1 — Use OEM specification
• Front crankshaft seal × 1 — Use OEM specification
• Oil pan gasket × 1 — Use OEM specification
• Water pump gasket × 1 — Use OEM specification
• Engine oil and filter × 1 — 10W-30 conventional
• Coolant (50/50 mix) × 1 — Ethylene glycol

Fluids

• engine_oil — 11 qt
• coolant — 24 qt

Preparation

1. Park vehicle on level ground and engage parking brake.
2. Disconnect negative battery cable and wait 2 minutes.
3. Raise and securely support vehicle on jack stands at all four corners.
4. Remove engine cover and air intake system.
5. Drain engine coolant completely into drain pan.
6. Drain engine oil and remove oil filter.
7. Install engine support fixture across engine bay or position floor jack with wood block under oil pan to support engine weight.

Procedure

1. 1

   Remove Serpentine Belt and Accessories
   Using a breaker bar, rotate the serpentine belt tensioner clockwise and remove the serpentine belt. Remove the power steering pump (3 bolts) and position aside without disconnecting hoses. Remove the alternator (2 mounting bolts plus adjustment bolt) and set aside. Remove the A/C compressor mounting bolts and secure compressor to frame without disconnecting refrigerant lines.
2. 2

   Remove Front Engine Mount
   Remove the passenger-side front engine mount bracket bolts (4 bolts total). Carefully raise engine approximately 1-2 inches using support fixture or jack to provide clearance for timing cover removal. Ensure engine is stable and weight is fully supported.
3. 3

   Remove Crankshaft Pulley and Harmonic Balancer
   Using the crankshaft pulley holder tool, secure the crankshaft. Remove the crankshaft bolt (large center bolt). Inspect this bolt per the factory service manual and verify torque specification and reuse policy before reinstallation. Use a harmonic balancer puller to remove the harmonic balancer from the crankshaft snout. Do not pry or hammer on the balancer.
   ⚠The crankshaft bolt is TTY - discard and replace with new OEM bolt only.
4. 4

   Remove Water Pump
   Disconnect the applicable radiator hoses at the water pump. Remove the water pump mounting bolts (verify exact count and mounting location per the factory service manual) and remove the water pump. Set aside and inspect for wear - replace if necessary.
5. 5

   Remove Oil Pan (Front Section)
   Remove the front oil pan bolts along the front edge where the pan meets the timing cover (verify exact count per the factory service manual). It is not necessary to fully remove the oil pan, but these bolts must be removed as they pass through the timing cover flange. Loosen the oil pan slightly to break the gasket seal at the front.
6. 6

   Remove Timing Cover
   Remove all timing cover bolts of varying lengths around the perimeter (verify exact count per the factory service manual), noting their locations as they are different lengths. Carefully pry the timing cover away from the engine block using a gasket scraper or pry bar at designated pry points only. Do not pry on sealing surfaces. Remove timing cover and set aside.
   ⚠Timing cover bolts are different lengths - mark or photograph locations for correct reinstallation.
7. 7

   Verify and Mark Timing Position
   Rotate the crankshaft by hand (clockwise only) until cylinder #1 is at top dead center (TDC) on the compression stroke. Verify timing marks: the crankshaft sprocket mark should align with the mark on the engine block, and the camshaft sprocket timing mark should align with the crankshaft sprocket mark per the factory service manual (single in-block camshaft). Use paint or a marker to clearly mark all timing positions before removal. Take photographs for reference.
   ⚠️Never rotate engine counterclockwise - this can cause valve-to-piston contact on interference engines.
8. 8

   Remove Timing Chain Tensioners
   Remove both timing chain tensioner mounting bolts (2 tensioners, one bolt each). Carefully extract the tensioners from their bores. Note the condition and spring tension - if weak, they should be replaced as part of the timing chain kit.
   Torque spec

   Timing Chain Tensioner25 Nm (18 lb-ft)
9. 9

   Remove Timing Chain Guides
   Remove the timing chain guide mounting bolts (typically 2-4 guides total with 1-2 bolts each). Remove all chain guides and inspect for wear grooves or cracks. Replace any worn guides - these should be included in the timing chain kit.
   Torque spec

   Timing Chain Guide Bolts12 Nm (9 lb-ft)
10. 10

    Remove Camshaft Sprocket Bolts and Timing Chain
    Remove the camshaft sprocket bolt(s) at the front of the single in-block camshaft, holding the cam from rotating as needed. Remove the camshaft sprocket, crankshaft sprocket, and timing chain as an assembly per the factory service manual. If sprockets are tight on camshaft snouts, gently tap with a soft mallet.
    Torque spec

    Camshaft Sprocket Bolts41 Nm (30 lb-ft)
11. 11

    Remove Crankshaft Sprocket
    Remove the crankshaft sprocket from the crankshaft snout. If tight, use a gear puller or carefully pry behind the sprocket with two pry bars positioned 180 degrees apart. Do not damage the crankshaft keyway or sealing surface. Remove the crankshaft key and set aside for reinstallation.
12. 12

    Inspect All Components
    Thoroughly inspect the crankshaft and camshaft sprocket mounting surfaces for wear, scoring, or damage. Inspect the timing cover sealing surface on the engine block for damage. Clean all gasket surfaces with gasket scraper and solvent - surfaces must be completely clean and dry. Inspect the crankshaft front seal bore in the timing cover and replace the seal.
13. 13

    Install Crankshaft Sprocket
    Install the crankshaft key into the crankshaft keyway. Install the new crankshaft sprocket onto the crankshaft, aligning the keyway. Tap gently with a soft mallet if needed to fully seat the sprocket. Verify the timing mark on the sprocket is visible and accessible.
14. 14

    Install Timing Chain and Camshaft Sprockets
    Route the new timing chain around the crankshaft sprocket, ensuring the colored or marked link aligns with the crankshaft sprocket timing mark. Position the single camshaft sprocket onto the camshaft snout while routing the timing chain around it. Align the camshaft sprocket timing mark with the crankshaft sprocket mark per the factory service manual. Verify both sprockets are properly aligned with their timing marks before proceeding.
    ⚠️All timing marks must be perfectly aligned before installing sprocket bolts. Misalignment will cause engine damage.
15. 15

    Install Camshaft Sprocket Bolts
    Install the camshaft sprocket bolt(s) and tighten to the OEM specification, holding the camshaft from rotating using the same method as removal. Verify the exact torque value against the factory service manual.
    Torque spec

    Camshaft Sprocket Bolts41 Nm (30 lb-ft)
16. 16

    Install Timing Chain Guides
    Install all timing chain guides in their original positions. Install and tighten all guide mounting bolts to 12 Nm (9 lb-ft). Ensure guides are properly seated and not interfering with chain movement.
    Torque spec

    Timing Chain Guide Bolts12 Nm (9 lb-ft)
17. 17

    Install Timing Chain Tensioners
    Compress the new timing chain tensioners and lock them in the compressed position using the locking pins provided in the kit. Install both tensioners into their bores and tighten mounting bolts to 25 Nm (18 lb-ft). After installation, carefully remove the locking pins to allow tensioners to apply pressure to the chain. Verify proper chain tension.
    Torque spec

    Timing Chain Tensioner25 Nm (18 lb-ft)
18. 18

    Verify Timing Alignment
    Manually rotate the crankshaft two complete revolutions clockwise (using a socket on the crankshaft snout bolt hole). Return to TDC and verify all timing marks align correctly. The crankshaft sprocket mark and the camshaft sprocket mark should realign per the factory service manual after two revolutions. If any mark is off, timing chain installation must be redone.
    ⚠️Do not proceed if timing marks do not align perfectly after two full rotations. Remove and reinstall timing chain.
19. 19

    Install New Front Crankshaft Seal
    Install the new front crankshaft seal into the timing cover using a seal driver or large socket. The seal should be flush with or slightly recessed from the timing cover surface. Lubricate the seal lip with clean engine oil before final installation.
20. 20

    Install Timing Cover
    Apply a thin bead of Mopar-specified RTV silicone sealant to the engine block sealing surface and the oil pan-to-block junction points. Position the new timing cover gasket. Install the timing cover, ensuring it seats properly over the crankshaft snout and seal. Install all timing cover bolts finger-tight first, then tighten in a cross-pattern sequence from center outward to 12 Nm (9 lb-ft).
    ℹ️RTV must be applied to oil pan-to-block corners where gasket does not seal completely.
    Torque spec

    Timing Cover Bolts12 Nm (9 lb-ft)
21. 21

    Reinstall Oil Pan Front Bolts
    Install a new oil pan gasket or apply fresh RTV to the front oil pan sealing surface where it meets the timing cover. Install the front oil pan bolts and tighten in sequence to manufacturer specification.
22. 22

    Reinstall Water Pump
    Install new water pump gasket or apply RTV as specified. Position water pump onto timing cover and install all 8 mounting bolts. Tighten bolts in a cross-pattern to manufacturer specification. Reconnect radiator hoses.
23. 23

    Install Harmonic Balancer and Crankshaft Pulley
    Lubricate the crankshaft snout and front seal lip with clean engine oil. Slide the harmonic balancer onto the crankshaft snout, ensuring proper keyway alignment. Install the NEW crankshaft bolt (do not reuse old TTY bolt). Using the crankshaft holder tool, tighten the crankshaft bolt to the OEM-specified torque value per the 1992 Viper factory service manual. Verify whether a torque-angle procedure applies before proceeding.
    ⚠Must use a NEW crankshaft bolt. Old TTY bolt will fail.
    Torque spec

    Crankshaft Sprocket Bolt180 Nm (133 lb-ft) + 90°
24. 24

    Reinstall Accessories and Front Engine Mount
    Lower engine back to original position using support fixture or jack. Reinstall front engine mount bracket and tighten all 4 bolts to specification. Reinstall A/C compressor, alternator, and power steering pump with all mounting bolts. Reinstall serpentine belt by rotating tensioner and routing belt according to belt routing diagram.
25. 25

    Refill Fluids and Final Checks
    Install new oil filter and refill engine with the OEM-specified oil capacity (approximately 8 quarts) of the recommended-grade oil per the factory service manual. Refill the cooling system with the OEM-specified coolant capacity (approximately 11-13 quarts) of a 50/50 ethylene glycol mixture per the factory service manual. Reinstall air intake system and engine cover. Reconnect negative battery cable. Before starting engine, perform a final visual inspection of all connections, bolts, and hoses.

Reassembly

1. Torque all fasteners to specification in the order listed in the procedure.
2. Use only NEW crankshaft bolt - the original is torque-to-yield and cannot be reused.
3. Apply RTV sealant only where specified - over-application can block oil passages.
4. Ensure all timing marks are perfectly aligned before rotating engine.
5. Double-check serpentine belt routing against underhood diagram.

Verification

• Rotate engine by hand two complete revolutions and verify all timing marks still align at TDC.
• Start engine and listen for unusual timing chain noise, rattling, or ticking.
• Check for oil leaks around timing cover, oil pan, and front crankshaft seal.
• Check for coolant leaks around water pump and radiator hoses.
• Verify engine idles smoothly with no misfires or rough running.
• Test drive vehicle and verify normal power delivery and acceleration.
• Recheck oil and coolant levels after test drive and top off as needed.

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