GMC 1989 Light Duty Truck Repair Manual page 344

6A-10 GENERAL ENGINE MECHANICAL
7. S nap R ing
Figure 15— Installing the Piston Ring Snap Ring
(6.2 L Engines)
Inspect (Figures 17)
I?
Ring fit as follows:
*
A ssem ble (Figures 4 and 5)
J-2 9 1 3 4 -A
Tool Required:
All compression rings are marked on the upper side
of the ring. When installing the compression rings,
make sure the MARKED SIDE IS TOWARD THE
TOP OF THE PISTON.
F-04509
Figure 16— Measuring Ring End Gap
1. Fit each compression ring to the piston on
which it is going to be used.
2. Slip the outer surface of the top and second
compression ring into the respective piston
ring groove (figure 17), to make sure that the
ring is free. If binding occurs at any point, the
cause should be determ ined. If binding is
c a u s e d by th e rin g g ro o ve , c o rre c t by
depressing the groove with a fine cut file. If the
binding is caused by a distorted ring, check a
new ring.
J 25220 Ring Expander (or equivalent)
B-04979