Replace a single hydraulic valve lifter on the 2.5L I4 engine, requiring removal of the valve cover, camshaft(s), and rocker arm assembly to access the lifter.

Warnings

Tools required

Parts

• Hydraulic valve lifter × 1 — Use OEM specification
• Valve cover gasket × 1 — Use OEM specification
• Valve cover bolt grommets × 10 — Use OEM specification
• Intake manifold gasket × 1 — Use OEM specification
• Engine oil and filter × 1 — Use OEM specification

Fluids

• Hyundai Genuine 0W-20 — 5 qt

Preparation

1. Ensure engine is completely cold to the touch
2. Park vehicle on level ground and engage parking brake
3. Disconnect negative battery cable and wait 3 minutes for airbag system to discharge
4. Remove engine cover by pulling upward on front and rear clips
5. Support engine from above using engine support bar across fender edges, or from below with appropriate jack and block
6. Drain coolant into suitable container by opening radiator drain and loosening upper hose
7. Label all electrical connectors, hoses, and vacuum lines with tape before disconnecting

Procedure

1. 1

   Remove intake manifold and ignition coils
   Disconnect air intake tube and throttle body connector. Remove PCV hose and brake booster vacuum line. Unbolt intake manifold (6 bolts) and carefully lift away with fuel rail attached if possible to avoid disconnecting fuel lines. Remove all four ignition coils by disconnecting electrical connectors and removing single bolt per coil. Keep coils in order.
   Torque spec

   Intake Manifold Bolts25 Nm (18 lb-ft)
2. 2

   Remove valve cover
   Disconnect any remaining harness clips from valve cover. Remove valve cover bolts in reverse of tightening sequence (start from outside, work toward center). Carefully pry valve cover loose using plastic tools only at designated pry points. Lift valve cover straight up to avoid damaging gasket mating surfaces. Inspect condition of head surface for damage.
   ⚠Do not pry between aluminum surfaces. Use only designated pry tabs on valve cover to avoid warping sealing surfaces.
   Torque spec

   Cover Bolts16 Nm (12 lb-ft)
3. 3

   Identify failed lifter and mark components
   Rotate engine by hand using crankshaft bolt to position all cam lobes of the affected cylinder in their base circle (pointing away from lifters). Use permanent marker or paint pen to mark each rocker arm shaft bearing cap with its position number and orientation arrow. Mark the rocker arm directly above the failed lifter. Verify failed lifter by checking for excessive play or collapse.
   ⚠️Rocker arm shaft bearing caps are NOT interchangeable. Installing them in wrong positions will cause immediate engine damage.
   ⚠Take photos of rocker arm assembly before disassembly for reference during reassembly.
4. 4

   Remove rocker arm shaft assembly
   Loosen rocker arm shaft bolts gradually in multiple passes, working from outer bolts toward center bolts, 1/4 turn at a time to prevent shaft warping. Once all bolts are loose, remove them completely and keep in order. Carefully lift entire rocker arm shaft assembly straight up. Place on clean workspace. Do NOT allow rocker arms to fall off shaft or change positions.
   ⚠Uneven removal of rocker arm shaft bolts can warp the shaft or damage bearing surfaces. Always loosen gradually in sequence.
   Torque spec

   Rocker Arm Shaft Bolts25 Nm (18 lb-ft)
5. 5

   Remove camshaft(s) if necessary
   If lifter cannot be accessed with rocker arms removed, camshaft removal is required. Mark camshaft bearing caps with position numbers. Loosen camshaft bearing cap bolts in multiple passes from outside toward center, 1/4 turn at a time. Remove bearing caps and keep in exact order. Carefully lift camshaft straight up, supporting both ends. Secure timing chain with wire to prevent it from falling into timing cover.
   ⚠️If timing chain jumps position, engine timing will be incorrect and must be reset before starting engine. Secure chain before removing camshaft.
   ⚠Camshaft bearing caps are directional and position-specific. Arrows on caps must point toward timing chain end.
6. 6

   Remove failed lifter
   Using magnetic pickup tool, carefully extract the failed lifter straight up from its bore. Inspect lifter for scoring, wear, or mechanical damage. Inspect lifter bore in cylinder head for scoring, debris, or damage. Clean bore thoroughly with lint-free cloth and brake cleaner. Ensure oil feed passage at bottom of bore is clear and not obstructed.
   ⚠Never reuse a collapsed or damaged lifter. Always install new lifter even if old one appears functional.
7. 7

   Install new lifter
   Remove new lifter from packaging. Coat exterior of lifter with fresh engine oil. Verify lifter moves freely by pressing check ball - it should compress slightly with firm pressure and return. Pour small amount of fresh engine oil into lifter bore. Carefully insert new lifter into bore, ensuring it slides in smoothly without binding. Lifter should drop into place under its own weight when properly aligned.
   ⚠Do not force lifter into bore. If binding occurs, remove and inspect bore for debris or damage.
8. 8

   Reinstall camshaft if removed
   If camshaft was removed, apply thin coat of clean engine oil to all camshaft journals and lobes. Verify timing chain is still properly positioned on crankshaft sprocket. Carefully lower camshaft onto head, engaging timing chain onto camshaft sprocket at correct timing marks. Install bearing caps in original positions with arrows pointing toward timing chain. Tighten cap bolts gradually in multiple passes from center outward to specified torque.
   ⚠️Verify camshaft timing marks align correctly with timing chain marks before final tightening. Incorrect timing will cause engine damage.
9. 9

   Reinstall rocker arm shaft assembly
   Apply clean engine oil to all rocker arm contact points and shaft surfaces. Position rocker arm shaft assembly onto cylinder head, ensuring all rocker arms align with their respective valve stems and lifters. Verify assembly is fully seated. Install rocker arm shaft bolts in original positions. Tighten evenly in multiple passes following sequence (center outward) to specified torque. Ensure cam lobes are pointing away from lifters during tightening.
   ⚠Tightening rocker arm shaft with cam lobes pressing on lifters can damage valves or bend pushrods. Verify cam position before torquing.
   Torque spec

   Rocker Arm Shaft Bolts25 Nm (18 lb-ft)
10. 10

    Install new valve cover gasket
    Thoroughly clean valve cover and cylinder head gasket surfaces using plastic scraper and silicone gasket remover. Ensure no old gasket material or oil remains. Install new valve cover bolt grommets into valve cover. Position new gasket onto valve cover (gasket typically has retaining features to hold it in place). Carefully lower valve cover onto cylinder head, aligning all bolt holes.
    ⚠Any oil or debris on gasket surfaces will cause oil leaks. Surfaces must be completely clean and dry.
    Torque spec

    Cover Bolts16 Nm (12 lb-ft)
11. 11

    Torque valve cover and reinstall components
    Install valve cover bolts with new grommets. Tighten in proper sequence (center outward, crisscross pattern) to specified torque. Do not overtighten. Reinstall ignition coils in correct cylinder positions and torque mounting bolts. Position new intake manifold gasket and install intake manifold, tightening bolts in sequence from center outward. Reconnect all electrical connectors, vacuum lines, and hoses to original positions.
    Torque spec

    Cover Bolts16 Nm (12 lb-ft)

    Intake Manifold Bolts25 Nm (18 lb-ft)

    Sensor Bolts11 Nm (8 lb-ft)
12. 12

    Refill coolant and engine oil
    Close radiator drain and reinstall drain plug if removed. Refill cooling system with Hyundai/Kia Long Life Coolant (Green) to proper level. Install new oil filter and refill engine with 5 quarts of Hyundai Genuine 0W-20 engine oil. Remove engine support equipment. Reconnect negative battery terminal.
    ⚠Use only specified coolant type. Mixing coolant types can cause cooling system damage.

Reassembly

1. Verify all electrical connectors are properly seated and secured
2. Double-check that no tools or rags were left in engine bay
3. Confirm all bolts are torqued to specification and no fasteners are missing
4. Verify timing chain position has not changed during procedure
5. Check that valve cover is properly sealed with no gaps visible

Verification

• Before starting engine, rotate crankshaft by hand two complete revolutions and verify smooth rotation with no binding or unusual resistance
• Start engine and allow to idle. Listen for any abnormal valve train noise, ticking, or knocking
• Monitor for oil leaks around valve cover gasket for first 5 minutes of operation
• Check coolant level after engine reaches operating temperature and top off if necessary
• Verify check engine light does not illuminate and no fault codes are present
• Road test vehicle and verify normal engine performance with no misfires or hesitation
• After 50-100 miles, re-check valve cover bolts and retorque if necessary (some settling may occur)
• Monitor oil consumption and valve train noise over next 500 miles to ensure lifter is functioning correctly

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