190201e Piston, Piston Rings and Connecting Rod Service

Question 1

Why remove the cylinder ridge when removing piston from cylinder

Answer 1

the piston rings will catch on the ridge making it difficult to remove and possibly damage the piston and rings

Question 2

excessive ring end gap could cause

Answer 2

blow-by (combustion gases in the crankcase)

Question 3

why is ring end gap required

Answer 3

allow the rings to expand

Question 4

worn ring grooves could cause

Answer 4

blow-by, oil consumption, could cause the ring to break

Question 5

when installing the connecting rod bearing it is important to check;

Answer 5

check the alignment of the tangs and oil holes & no foreign material between the bearing and bore

Question 6

piston skirt measurement should be taken midway down the skirt and ___________ to the piston pin bores.

Answer 6

90 degrees

Question 7

full floating piston pin maybe difficult to remove at room temperature. you may have to?

Answer 7

heat the piston in boiling water or an oven

Question 8

what should not be used to clean an aluminum piston?

Answer 8

hot tank

Question 9

what parts of the piston should not be glass beaded?

Answer 9

ring grooves (aluminum ring grooves)
skirt
piston pin bores

Question 10

when installing connecting rod bearings shells in the rod and cap it is important to check?

Answer 10

alignment of the locating lug (tang)

oil holes

Question 11

excessively worn piston rings can cause?

Answer 11

blow-by (compression gases reaching the crankcase)

Question 12

what maybe the result if a piston ring has excessive end gap?

Answer 12

blow-by (compression gases reaching the crankcase)

Question 13

how are keystone piston ring grooves checked for reuse?

Answer 13

ring groove wear gauge