Chrysler Concorde 1993 Service Manual page 434

(b) Attach dial indicator Tool C-3339 to cylinder
head and set it at right angle of valve stem being
measured (Fig. 22).
(c) Move valve to and from the indicator. Refer to
specifications (Fig. 24).
Ream the guides for valves with oversized stems if
dial indicator reading is excessive or if the stems are
scuffed or scored.
(5) Service valves with oversize stems and over size
seals are available in 0.15mm (.0059 inch.), 0.40mm,
(.0157 inch.) and 0.80mm (.0315 inch.) oversize.
Oversize seals must be used with oversize
valves.
Reamers to accommodate the oversize valve stem are
as follows:
Fig. 22 Measuring Valve Guide Wear
Fig. 23 Intake and Exhaust Valves
(6) Slowly turn reamer by hand and clean guide
thoroughly before installing new valve. Do not at-
tempt to ream the valve guides from standard
directly to 0.80mm (.0315 inch.) Use step proce-
dure of 0.15mm (.0059 inch.), 0.40mm (.0157 inch.)
and 0.80mm (.030 inch) so the valve guides may
be reamed true in relation to the valve seat. After
reaming guides, the seat runout should be
Fig. 24 Valve Guide Specifications
measured and resurfaced if necessary. See Refac-
ing Valves and Valve Seats.
VALVE GUIDES
Replace cylinder head if guide does not clean
up with 0.80mm (.0315 inch) oversize reamer, or if
guide is loose in cylinder head.
Fig. 25 Valve Specifications
REFACING VALVES AND VALVE SEATS
The intake and exhaust valves have a 44.5 to 45
degree face angle. The valve seats have a 45 to 45.5
degree face angle. The valve face and valve seat angles
are shown in (Fig. 25).
VALVES
(1) Inspect the remaining margin after the valves
are refaced Refer to specifications (Fig. 25).
VALVE SEATS
(1) When refacing valve seats, it is important that
the correct size valve guide pilot be used for reseating
stones. A true and complete surface must be obtained.
(2) Measure the concentricity of valve seat using dial
indicator. Total runout should not exceed .051mm (.002
inch) total indicator reading.
3.5L ENGINE 9 - 51