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Home >> Chrysler >> 1997 >> Sebring LXi >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 2.5L V6 Engine - VIN [N] - Avenger & SEBRING Coupe >> Overhaul >> Cylinder Head Overhaul >> Valve Seat

Valve Seat

  1. Worn or burned valve seats can be reworked, provided proper angles and seat widths are obtained. See Fig 6. Before correcting valve seat, check for clearance between valve guide and valve end. If necessary, replace valve guide. Correct to obtain specified seat width and angle. After correction, lapp valve and valve seat with a lapping compound.
  2. To remove valve seat, cut seat in order to thin wall thickness. See Fig 7. Remove valve seat. Bore valve seat hole in cylinder head to oversize valve seat diameter. See Fig 3. Intake valve seats are available in 0.3 oversize, which is 1.3504-1.3516" (34.30-34.33 mm) or 0.6 oversize, which is 1.3622-1.3634" (34.60-34.63 mm). Exhaust valve seats are available in 0.3 oversize, which is 1.2520-1.2531" (31.80-31.83 mm) or 0.6 oversize, which is 1.2638-1.2650" (32.10-32.13 mm).
  3. Before installing valve seat, either heat cylinder head to about 482°F (250°C) or cool valve seat in liquid nitrogen. Using valve seat cutter, correct valve seat to specified width and angle.
Fig 1: Measuring Valve Guide Installed Height
G00078765Courtesy of CHRYSLER CORP.
Fig 2: Identifying Valve Seal Color Code
G00078764Courtesy of CHRYSLER CORP.
Fig 3: Measuring Valve Seat Height
G00078763Courtesy of CHRYSLER CORP.
Fig 4: Exploded View Of Cylinder Head Components
G00078762Courtesy of CHRYSLER CORP.
Fig 5: Checking Valve Seat Contact Aria & Head Thickness
G00078752Courtesy of CHRYSLER CORP.
Fig 6: Identifying Proper Valve Seat Angles
G00078751Courtesy of CHRYSLER CORP.
Fig 7: Replacing Valve Seat
G00078750Courtesy of CHRYSLER CORP.
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