SERVICE MANUAL
  Applies to: Hyundai Coupe/Tiburon 1998-2000
GROUP
Engine Mechanical System Cylinder Head Assembly
Return to Main Menu(s):      Mechanical Manual      Electrical Manual

VALVES AND VALVE SPRINGSá
COMPONENTS
Return to Main Menu(s):      Mechanical Manual      Electrical Manual

DISASSEMBLYá
  1. Using the special tool, Valve Spring Compressor (09221-29100) remove the retainer lock. Next remove the spring retainer, valve spring, spring seat and valve.

    NOTE
    Keep these parts in order so they can be reinstalled in their original positions.
  1. Remove the valve stem seals using special tool. Valve stem oil seal remover (09222-29000).

    NOTE
    Do not reuse the valve stem seals.
Return to Main Menu(s):      Mechanical Manual      Electrical Manual

VALVE GUIDE REPLACEMENT PROCEDURESá

The valve guide is installed using a press fit. Using a Valve Guide Installer (09221-22000) or suitable tool, replace the valve guide described in the following procedure.

  1. Using the Valve Guide installer push rod, push the valve guide out toward the cylinder block with a press.

  1. Machine the valve guide insert hole in the cylinder head to the specified oversize of the new valve guide.

  1. Using the Valve Guide Installer adapter (09222-29000) and Valve Guide installer or suitable tool, press fit the valve guide. Using the valve guide installer makes it possible to press fit the valve guide to a predetermined height. Install the valve guide from the top of the cylinder head. Note that intake and exhaust valve guides differ in length (42.7 mm [1.68 in] for intake and 39.1 mm [1.54 in.] for exhaust).

  1. After installing the valve guides, insert new valves and check the clearance.

  1. Whenever valve guides are replaced, check for valve-to-seat contact, and recondition the valve seats as necessary.

Return to Main Menu(s):      Mechanical Manual      Electrical Manual

INSTALLATIONá
NOTE
  1. Clean each part before assembly.
  2. Apply engine oil to sliding and rotating parts.
  1. After installing the spring seat, fit the stem seal onto the valve guide.

    To install, fit the seal in by lightly tapping the Special Tool, Valve Stem Oil Seal Installer (09222-22000)

    The seal is installed in the specified position by means of the special tool. Incorrect installation of the seal will adversely affect the lip I.D. and eccentricity, resulting in oil leaking down the valve guides. Therefore, when installing, be careful not to twist the seal. Do not reuse old stem seals.

  1. Apply engine oil to each valve stem. Insert the valves into the valve guides. Avoid using force when inserting the valve into the seal. After insertion, check to see if the valve moves smoothly.

  1. Install springs and spring retainers. Valve springs should be installed with the enamel coated side toward the valve spring retainer.

  1. Using special tool, Valve Spring Compressor (09221-29100), compress the spring. Be careful that the valve stem seal is not distorted by the bottom of the retainer. Then install the retainer locks. After installation of the valves, make certain that the retainer locks are properly installed.

  1. Install the cylinder head. Refer to "Cylinder Head"

Return to Main Menu(s):      Mechanical Manual      Electrical Manual

VALVE SEAT INSERT REPLACEMENT PROCEDURE.á
  1. Any valve seat insert that has been worn over the service limit should be removed at normal temperature after cutting away most of the insert wall, using valve seat cutters, as shown in Fig A.

    Valve Seat Insert Oversizes
    Description
    Size mm (in.)
    Size mark
    Seat insert height H mm (in.)
    Cylinder head I.D. mm (in.)
    Intake valve seat insert
    0.3
    (0.012)
    O.S.
    30
    5.1-5.3
    (0.201-0.209)
    29.8-29.821
    (1.173-1.174)
    0.6
    (0.024)
    O.S.
    60
    5.4-5.6
    (0.213-0.220)
    30.1-30.12
    (1.185-1.186)
    Exhaust valve seat
    0.3
    (0.012)
    O.S.
    30
    5.9-6.1
    (0.232-0.240)
    27.3-27.321
    (1.074-1.075)
    0.6
    (0.024)
    O.S.
    60
    6.2-6.4
    (0.244-0.252)
    27.6-27.621
    (1.086-1.087)
  1. After removing the seat insert, machine the seat insert bore using a reamer or a cutter. Cut to the size shown in the table.

  1. Heat the cylinder head to about 250░C (480░F) and press in the oversize seat insert. The oversize seat insert should be at normal room temperature for installation. After installing a new valve seat insert, resurface the valve seat using the same procedure described in the first paragraph of "Valve Seat Insert".

Return to Main Menu(s):      Mechanical Manual      Electrical Manual

INSPECTIONá
VALVES
  1. Using a wire brush, clean the valve thoroughly.

  1. Check each valve for wear, damage and distortion of head and stem at B. Repair or correct if necessary. If stem end A is pitted or worn, resurface as necessary. This correction must be limited to a minimum. Also resurface the valve face. Replace the valve if the margin has decreased to less than the service limit.

    Margin
    MEASUREMENT SPECIFICATION
    Intake 1.1 mm ( 0.0433 mm )
    Exhaust 1.3 mm ( 0.0512 mm )
    Margin
    MEASUREMENT SPECIFICATION
    Intake 0.8 mm ( 0.0391 in )
    Exhaust 1.0 mm ( 0.039 in )
Valve Springs
  1. Check the valve spring free length and tension. If they exceed the service limit, replace the spring.

  1. Using a square, test the squareness of each spring. If the spring is excessively out of square, replace it.

    Valve spring
    MEASUREMENT SPECIFICATION
    Free height 46.07 mm ( 1,8137 in )
    Load 25.5kg at 37 mm
    Load 57.3kg at 28 mm
    SPECIFICATION
    Out of square 3░ or less
Valve Guides

Check the valve stem to guide clearance. If the clearance exceeds the service limit, replace the valve guide with next oversize part.

Valve stem-to-guide clearance
MEASUREMENT SPECIFICATION
Intake 0.020-0.050 mm ( 0.0008-0.0019 in )
Exhaust 0.050-0.085 mm ( 0.0019-0.0033 in )
Valve stem-to-guide clearance
MEASUREMENT SPECIFICATION
Intake 0.1 mm ( 0.004 in )
Exhaust 0.15 mm ( 0.006 in )
Valve Seat Insert

Check the valve seat for evidence of overheating and improper contact with the valve face. Replace the seat if necessary.

Before reconditioning the seat, check the valve guide for wear. If the valve guide is worn, replace it, then recondition the seat. Recondition the valve seat with a valve seat grinder or cutter. The valve seat contact width should be within specifications and centered on the valve face.