washers bear against thrust shoulders on
the shafts.
A helical drive gear with a counterweight
is secured to each shaft with a Woodruff
key
(see
on
11B-97), nut, nut retainer, retainer bolt
The drive gears are
and lock washers.
attached to the rear end of the shafts on
a l l engines.
To help maintain engine balance, a bal-
ance weight is installed on the front end
of each shaft.
Lubrication
Lubricating oil is supplied under pres-
sure to the bearings from the main oil
gallery through a horizontal transverse
passage at each end of the cylinder
block,
then
up
the
connecting
vertical
passages in each corner of the block to
Figure 11B-146. Checking Engine
the camshaft and balance shaft end bear-
Timing by Measuring Injector
intermediate
camshaft
The
ings.
Depression
bearings are lubricated by the oil from
the end bearings passing through the
The engine is equipped with a low veloci-
drilled passage in the shaft.
ty, low lift Injector- cam lobe and a long
c l o s i n g ramp e x h a u s t c a m l o b e d e s i g n
The lower halves of the camshaft inter-
camshaft.
mediate bearings are grooved along the
horizontal surface that mates with the
On both the camshaft and balance shaft,
upper
halves
of
the
bearing
(see
the gear thrust load is absorbed by two
Oil
Figure 11B-149 on page 11B-97).
t h r u s t w a s h e r s , one on each end of the
from the passage in the camshaft is
The thrust
rear end s h a f t b e a r i n g s .
C a m s h a f t and Balance Shaft Assemblies
F i g u r e 11B-147.