Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1486
SPRINGS-VALVE
DESCRIPTION
The valve springs (3) are made from high strength, chrome-silicon steel. The springs are common for intake and
exhaust applications. The valve spring seat is integral with the valve stem seal (4), which incorporates a garter
spring to maintain consistent lubrication control to the valve stem.
9 - 1968
ENGINE - 2.7L DOHC - SERVICE INFORMATION
LX
REMOVAL
IN VEHICLE
1. Release fuel pressure before attempting any
repairs (Refer to 14 - FUEL SYSTEM/FUEL
DELIVERY - STANDARD PROCEDURE).
2. Disconnect negative battery (1) cable located in
trunk.
3. Remove air cleaner housing (3) and inlet hose
(Refer to 9 - ENGINE/AIR INTAKE SYSTEM/AIR
CLEANER HOUSING - REMOVAL).
LX
ENGINE - 2.7L DOHC - SERVICE INFORMATION
9 - 1969
4. Remove upper intake manifold (1) (Refer to 9 -
ENGINE/MANIFOLDS/INTAKE
MANIFOLD
-
REMOVAL).
5. Remove cylinder head covers (Refer to 9 -
ENGINE/CYLINDER
HEAD/CYLINDER
HEAD
COVER(S) - REMOVAL).
6. Remove crankshaft vibration damper (Refer to 9 -
ENGINE/ENGINE BLOCK/VIBRATION DAMPER -
REMOVAL).
7. Remove timing chain cover (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT / CHAIN COVER(S)
- REMOVAL).
8. Remove timing chain (Refer to 9 - ENGINE/VALVE
TIMING/TIMING BELT/CHAIN AND SPROCKETS -
REMOVAL).
9. Remove camshafts and rocker arms (Refer to 9 -
ENGINE/CYLINDER
HEAD/CAMSHAFT(S)
-
REMOVAL).
10. With air hose attached to spark plug adapter installed in the cylinder being serviced, apply 620.5–689 kPa (90–
100 psi) air pressure. This is to hold valves in place while servicing components.
11. Using Special Tool MD 998772A with adapter 6779, compress valve spring and remove valve locks, retainer,
and valve spring.
12. Remove valve stem seal (Refer to 9 - ENGINE/CYLINDER HEAD/VALVE STEM SEALS - REMOVAL).
9 - 1970
ENGINE - 2.7L DOHC - SERVICE INFORMATION
LX
OFF VEHICLE
1. With cylinder head removed, compress valve springs (3) using a Special Tool C-3422-D, Valve Spring Compres-
sor.
2. Remove valve retaining locks (1), valve spring retainers (2), valve springs (3).
INSPECTION
Whenever valves have been removed for inspection,
reconditioning
or
replacement,
valve
springs
(1)
should be tested . As an example; the compression
length of a spring to be tested is 38.00 mm (1.496 in.).
Turn the table of Tool C-647 (2) until surface is in line
with the 38.00 mm (1.496 in.) mark on the threaded
stud and the zero mark on the front. Place spring (1)
over stud on the table and lift compressing lever to set
tone device. Pull on torque wrench until ping is heard.
Take reading on torque wrench at this instant. Multiply
this reading by two. This will give the spring load at
test length. Fractional measurements are indicated on
the table for finer adjustments. Refer to Engine Spec-
ifications to obtain specified height and allowable ten-
sions (Refer to 9 - ENGINE - SPECIFICATIONS).
Replace any springs that do not meet specifications.
LX
ENGINE - 2.7L DOHC - SERVICE INFORMATION
9 - 1971
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