Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1484
5. Install ignition coil capacitor (2) and fastener.
6. Connect ground strap (1) to cylinder head cover
stud.
7. Connect PCV hose to cylinder head cover grom-
met.
8. Connect all electrical connectors and harness clips.
9. Install foam insulator (1) on top of cylinder head
cover (2).
10. Install
upper
intake
manifold
(Refer
to
9
-
ENGINE/MANIFOLDS/INTAKE
MANIFOLD
-
INSTALLATION).
11. Connect negative battery (1) cable.
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ENGINE - 2.7L DOHC - SERVICE INFORMATION
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VALVES & SEATS-INTAKE/EXHAUST
DESCRIPTION
The valves (5)&(6) are made of heat resistant steel, and have chrome plated stems to prevent scuffing. The four
valves per cylinder (two intake (6) and two exhaust (5)) are actuated by roller rocker arms, which pivot on stationary
lash adjusters. All valves use three bead lock keepers (1) to retain springs (3) and to promote valve rotation.
STANDARD PROCEDURE - VALVE AND VALVE SEAT REFACING
The intake and exhaust valves have a 44.5 to 45
degree face angle (1). The valve seats (2) have a 45
to 45.5 degree face angle.
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ENGINE - 2.7L DOHC - SERVICE INFORMATION
9 - 1961
VALVES
Inspect the remaining margin (5) after the valves are
refaced (Refer to 9 - ENGINE - SPECIFICATIONS).
VALVE SEATS
NOTE: 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.
1. Measure the concentricity of valve seat using dial
indicator. Total runout should not exceed 0.051 mm
(0.002 inch.) total indicator reading.
2. Inspect the valve seat (3) with Prussian blue to
determine where the valve contacts the seat. To do
this, coat valve seat (3)LIGHTLY with Prussian
blue then set valve in place. Rotate the valve with
light pressure. If the blue is transferred to the cen-
ter of valve face (4), contact is satisfactory. If the
blue is transferred to top edge of valve face, then
lower valve seat with a 15 degree stone. If the blue
is transferred to the bottom edge of valve face,
then raise valve seat with a 65 degree stone.
NOTE: Valve seats which are worn or burned can be reworked, provided that correct angle and seat width
are maintained. Otherwise cylinder head must be replaced.
3. When seat is properly positioned the width of the intake 1.00 to 1.50 mm (0.0394 to 0.0591 in.) and exhaust
seats should be 1.25 to 1.75 mm (0.049 to 0.069 in.).
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ENGINE - 2.7L DOHC - SERVICE INFORMATION
LX
4. Check the valve spring installed height (4) after
refacing the valve and seat.
VALVE AND SPRING INSTALLED HEIGHT
1. Coat valve stems (2) with clean engine oil and
insert them in cylinder head.
2. If valves or seats have been refaced, check valve
tip height (5). If valve tip height (5) for intake valve
is greater than 47.836 mm (1.883 in.) or 47.837
mm (1.883 in.) for exhaust valve, grind valve tip
until within specifications. Make sure measurement
is taken from cylinder head surface to the top of
valve stem.
3. Install valve seal/spring seat assembly (8) over
valve guides on all valve stems. Ensure that the
garter spring (9) is intact around the top of the rub-
ber seal.
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ENGINE - 2.7L DOHC - SERVICE INFORMATION
9 - 1963
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