Town & Country Van AWD V6-230 3.8L VIN L SMFI (1998)
Valve Seats
5. Move valve to and from the indicator. Refer to Valve Guide Specification Chart.
6. Ream the guides for valves with oversized stems if dial indicator reading is excessive or if the stems are scuffed or scored.
7. Service valves with oversize stems and over size seals are available in 0.15 mm (0.006 inch), 0.40 mm, (0.015 inch) and 0.80 mm (0.030 inch)
oversize.
NOTE: Oversize seals must be used with oversize valves.
8. Refer to Valve Guide Specification Chart for reamer size to accommodate the oversize valve stems.
9. Slowly turn reamer by hand and clean guide thoroughly before installing new valve. Do not attempt to rean1 the valve guides from standard
directly to 0.80 mm (0.030 inch) Use step procedure of 0.15 mm (0.005 inch), 0.40 mm (0.015 inch) and 0.80 mm (0.030 inch) so the valve guides
may be reamed true in relation to the valve seat. After reaming guides, the seat runout should be measured and resurfaced if necessary. See
Refacing Valves and Valve Seats.
Valve Guides
NOTE: Replace cylinder head if guide does not clean up with 0.80 mm (0.030 inch) oversize reamer, or if guide is loose in cylinder head.
Refacing Valves And Valve Seats
Valve Seats
The intake and exhaust valves have a 44-1/2 to 45 degree face angle. The valve seats have a 45 to 45 1/2 degree face angle. The valve face and valve
seat angles are shown in image.
Valves
