T100 SR5 Extra Cab Pickup 2WD V6-3.4L (5VZ-FE) (1997)
Piston Ring: Testing and Inspection
1. Insert the piston ring into the cylinder bore.
2. Using a piston, push the piston ring a little beyond the bottom of the ring travel, 115 mm (4.53 inch) from the top of the cylinder block.
3. Using a feeler gauge, measure the end gap.
Ring end gap:
STD:
No. 1: 0.300 - 0.500 mm (0.0118 - 0.0197 inch)
No. 2: 0.400 - 0.600 mm (0.0157 - 0.0236 inch)
Oil (side rail): 0.150 - 0.550 mm (0.0059 - 0.0217 inch)
Maximum:
No. 1: 1.100 mm (0.0433 inch)
No. 2: 1.200 mm (0.0472 inch)
Oil (side rail): 1.150 mm (0.0453 inch)
If the end gap is greater than the maximum, replace the piston ring. If the end gap is greater than the maximum, even with a new piston ring, rebore
all the 6 cylinders or replace the cylinder block.