Pistons - Rings

5.2.2.7

Pistons - Rings - Rods.

5.2.2.7.1

Remove Piston and Connecting Rod.

To remove the piston and connecting rod from

the engine, bend down con-

necting rod lock. Remove the connecting rod

cap. Remove any carbon or

ridge at the top of the cylinder bore, this will

prevent breaking of the rings.

Push the piston and rod out through the top of

the cylinder.

The pistons used in the sleeve bore aluminum alloy engines are marked with

an "L" on top of the piston. These pistons are tin plated and use an expander

with the oil ring.

5.2.2.7.2

Remove Connecting Rod.

To remove connecting rod from piston, remove piston pin lock with thin

nose pliers. One end of the pin is drilled to facilitate removal of the lock.

Remove rings one at a time, slipping them over the ring lands.

Use a ring

expander to prevent damage to rings and piston.

Check Piston.

5.2.2.7.3

If the cylinder is to be resized, there is no reason to check the piston, since

a new oversizer piston assembly will be used.

If, however, the cylinder is not to be resized, and the piston shows no signs

of wear or scoring, the piston should be checked.

To do so, clean carbon from top ring groove. Place a NEW ring on the

groove, check the remaining space in the groove with a feeler gauge. If a

. 005" feeler gauge can be inserted, the piston is worn and should be replaced.

5.2.2.7.4

Check Rings.

To check rings, first clean all carbon from the ends of the rings and from

the cylinder bore. Insert old rings, one at a time, one inch down into the

cylinder. Check gap with feeler gauge. If ring gap is greater than shown

in Table No. 6, the ring should be rejected.

NOTE: CHROME RING SETS ARE AVAILABLE FOR 2.375" BORE - MODEL

SERIES SX-1086.