PISTON AND CONNECTING ROD - CONTINUED
Pistons are machined to a very close weight tolerance. Make sure the same part number
piston is used throughout the engine. Weight difference will affect engine operation.
42. Piston (1)
Retaining ring (2)
Using 6-inch snapring pliers, put in
groove in piston bore.
Heat-protective cloth mittens must be worn to prevent serious injury to hands when
handling heated parts.
Pistons must be heated in hot water to prevent piston damage during piston pin
Do not drive piston pins with hammer. Driving may cause distortion of piston, causing
piston seizure in cylinder sleeve.
Be sure retaining ring is firmly seated in groove of piston pin bore to prevent serious
Do not attempt to push in piston pin after piston has cooled. At 70°F (21°C), the piston
pin fit is 0.0001 to - 0.0003 inch (0.003 to - 0.008 mm), which prevents piston pin
assembly unless piston is heated.
Install new or inspection-approved pistons on connecting rod. Be sure to install pistons
on their companion connecting rod, as tagged during disassembly.
Piston pin (3) and
retaining ring (4)
Submerge in container of boiling water
for 15 minutes to allow pistons to
Remove from boiling water and place
connecting rod in piston.
Push piston pin through piston pin bore
(5) and connecting rod bore before pis-
Using 6-inch snapring pliers, put
retaining ring in groove in piston pin