Caravan AWD V6-201 3.3L (1991)
Valve Spring: Service and Repair
Cylinder Head On
1.
Perform fuel system pressure release procedure before attempting any repairs.
2.
Disconnect negative battery cable.
3.
Remove Air Cleaner Cover and hose assembly.
4.
Remove upper Intake Manifold.
5.
Remove cylinder head covers and spark plugs.
6.
Remove connector wire from ignition coils.
7.
Using suitable socket and flex handle at crankshaft pulley retaining screw, turn engine so the number 1 piston is at Top Dead Center on the
compression stroke.
8.
Remove rocker arms with rocker shaft and install a dummy shaft. The rocker arms should not be disturbed and left on shaft.
9.
With air hose attached to spark plug adapter installed in number 1 spark plug hole, apply 90 to 100 psi air pressure (620.5 to 689 kPa). This is to
hold valves into place while servicing components.
10.
Using Tool C-4682, or equivalent compress valve spring and remove retainer valve locks and valve spring.
11.
The intake valve stem seals should be pushed firmly and squarely over the valve guide using the valve stem as guide. Do Not Force seal against
top of guide. When installing the valve retainer locks, compress the spring only enough to install the locks.
CAUTION: Do not pinch seal between retainer and top of valve guide.
12.
Follow the same procedure on the remaining 5 cylinders using the firing sequence 1-2-3-4-5-6. Make sure piston in cylinder is at Top Dead Center
(TDC) on the valve spring that is being covered.
13.
Remove spark plug adapter tool.
14.
Remove dummy shaft and install rocker shaft assembly and tighten screws to 28 Nm (250 inch lbs.).
15.
Install cylinder head covers tighten screws to 14 Nm (120 inch lbs.) and connector to ignition coils.
16.
Install Intake Manifold.
