Gap in the castle
1. Push a new ring with a piston into the cylinder to a depth of 15-20 mm from the bottom.
2. Measure the clearance in the piston ring lock with a feeler gauge:
- If the clearance is too small, check if these rings are suitable for your engine.
- If the clearance is too large, recheck the cylinder bore against the wear limit above. If wear exceeds the allowable limit, it is required to bore the cylinder block.
Piston ring gap:
Replacement
1. Remove the old piston rings with a tool.
2. Thoroughly clean all ring grooves.
Note:
- Use a broken piston ring or a piston ring groove cleaner with a suitable blade.
- Upper compression ring groove width is 1.0mm (engine D16W1) or 1.2 mm (engine D16W2).
- The width of the groove for the second compression ring is 1.2 mm (engine D16W1) or 1.5 mm (engine D16W2).
- The width of the groove for the oil scraper ring is 2.8 mm.
- File the blade if necessary.
- Do not clean the piston webs between the ring grooves with a wire brush and do not deepen the webs with a cleaning tool.
3. Install new rings in desired position (see below).
Note:
- Do not reuse old piston rings.
- If you want to separate the piston from the connecting rod, do not install new rings yet.
Gap between piston ring and piston groove
After installing a new set of rings, measure the gap between the ring and the piston groove:
Gap between upper compression ring and piston groove
D16W1 engine | Engine D16W2 | |
Standard (new) | 0.035-0.060 mm | 0.030-0.060 mm |
Limit | 0.13mm | 0.13mm |
Clearance between second compression ring and piston groove
Standard (new) | 0.030-0.055 mm |
Limit | 0.13mm |
Reconciliation
1. Install rings as shown.
Note: Factory marking must face up.
Piston ring dimensions:
Top compression (standard)
A | IN | |
D16W1 engine | 2.6mm | 1.0 mm |
Engine D16W2 | 2.8mm | 1.2mm |
Second compression (standard)
A | IN | |
D16W1 engine | 3.0mm | 1.2mm |
Engine D16W2 | 3.2mm | 1.5mm |
1. top compression; 2. second compression
2. Turn the rings in the grooves and make sure they do not stick.
1. label; 2. label; 3. gasket; 4. oil scraper ring; 5. second compression ring; 6. top compression ring
3. Position the ring locks as shown.
1. second compression ring lock; 2. do not lock any ring on the thrust surfaces of the piston.; 3. oil scraper ring lock; 4. gasket lock; 5. oil scraper ring lock; 6. do not place the lock of any ring against the hole for the piston pin.; 7. about 90°; 8. upper compression ring lock; 9. about 90°