Caravan FWD V6-3.3L VIN R (2001)
INSPECTION
Whenever valves have been removed for inspection, reconditioning or replacement, valve springs should be tested (Fig. 37). As an example; the
compression length of a spring to be tested is 38.00 mm (1.496 inch). Turn the table of Tool C-647 until surface is in line with the 38.00 mm (1.496
inch) mark on the threaded stud and the zero mark on the front. Place spring 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 Specifications to obtain specified height and
allowable tensions. Replace any springs that do not meet specifications.
INSTALLATION
CYLINDER HEAD OFF
1. If removed, install a new valve stem seal.
2. Position valve spring and retainer on spring seat.
3. Using Special Tool C-3422-C with 8464 Adapter (Fig. 35), compress the spring only enough to install the valve retainer locks.
4. Slowly release the spring tension. Ensure the retainer locks are seated properly.
CYLINDER HEAD ON
1. 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.
2. 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 TDC on the valve
spring that is being covered.
3. Remove spark plug adapter tool.
4. Install rocker arms and shaft assembly.
5. Install cylinder head covers.
6. Install spark plugs and connect wires.
7. Connect negative cable to battery.
