ENGINE BLOCK
DESCRIPTION
The die cast aluminum cylinder block is a two-piece assembly, consisting of the cylinder block and ladder frame.
The block is an open deck design with cast in place cast iron cylinder liners. The cast iron cylinder liners are
recessed below the aluminum deck surface. The ladder frame bolts to the cylinder block and does not incorporate
the main bearing caps. This design offers a much stronger lower end and increased cylinder block and transaxle
rigidity. The rear oil seal retainer is integral with the block and ladder frame. The ladder frame and block are ser-
viced as an assembly.
The engine build date is located on the bottom of the
ladder frame just behind the oil pan. The date can be
seen with the oil pan in place.
STANDARD PROCEDURE
CYLINDER BORE HONING
1. Used carefully, a quality commercially available cyl-
inder bore resizing hone equipped with 220 grit
stones, is the best tool for this honing procedure. In
addition to deglazing, it will reduce taper and out-
of-round as well as removing light scuffing, scoring
or scratches. Usually a few strokes will clean up a
bore and maintain the required limits.
2. Deglazing of the cylinder walls may be done using
a quality commercially available cylinder surfacing
hone, recommended tool C-3501 or equivalent,
equipped with 280 grit stones, if the cylinder bore
is straight and round. 20–60 strokes depending on
the bore condition, will be sufficient to provide a
satisfactory surface. Use a light honing oil. Do not
use engine or transmission oil, mineral spirits
or kerosene. Inspect cylinder walls after each 20
strokes.
3. Honing should be done by moving the hone up and
down fast enough to get a cross-hatch pattern.
When hone marks intersect at 30-50 degrees, the
cross hatch angle is most satisfactory for proper seating of rings.
4. A controlled hone motor speed between 200–300 RPM is necessary to obtain the proper cross-hatch angle. The
number of up and down strokes per minute can be regulated to get the desired 40–60 degree angle. Faster up
and down strokes increase the cross-hatch angle.
5. After honing, it is necessary that the block be cleaned again to remove all traces of abrasive.
PM
ENGINE 2.4L WORLD
9 - 1711