Piston ring gap measurement
Installation on the piston of the oil scraper ring expander
The location of the piston rings on the piston
1 - top sealing ring;
2 – an average sealing ring;
3 - oil scraper ring
1. Before installing new piston rings, check the gap in the ring lock.
2. Position the pistons and piston rings according to the cylinders in which they will work.
3. Install the top o-ring into the first cylinder and push it into the cylinder with the piston crown to the bottom of the cylinder.
Attention! The top and middle sealing rings are different, the outer surface of the middle ring is tapered.
4. Using a feeler gauge, measure the gap in the ring lock.
5. Repeat the measurement process with the ring installed on top of the cylinder and compare the measurement results with the technical data.
6. If the gap is too small, it must be increased by grinding the ends of the ring.
7. If the gap in the ring lock is too large, check the correct fit of the rings to your engine.
8. Repeat the test operation for each ring in the first cylinder and then for the rings in the remaining cylinders.
9. Install the piston rings on the pistons in the same way as when removing.
10. When installing the oil scraper ring, install the expander first, then the ring, moving the ring lock 180°from the expander lug. Check that the TOP marking on the rings is pointing up (see fig. The location of the piston rings on the piston). Position the locks of the upper and middle compression rings 120°apart from the lock of the oil scraper ring. Check that the piston ring locks are not aligned with the piston pin axis.