ME990421 Mitsubishi RING SET PISTON, Price: 172.89$, Weight: 0.107kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Mitsubishi |
ME990421 |
RING SET PISTON |
20 |
0.107 |
2-3 |
172.89$ |
Originals
Premium Engine Piston Rings Set
This engine piston rings set restores compression, controls oil, and protects the cylinder wall. Built to OE standards, it’s the right choice for a smooth, efficient rebuild and long-term reliability.
Why this part is needed
The rings seal the combustion chamber, transfer heat from the piston to the cylinder, and scrape excess oil from the bore. Without proper sealing, power and efficiency drop, and wear accelerates.
How it works
A typical pack uses two compression rings and one oil control ring with an expander. Combustion pressure pushes the rings outward to seal the bore. The scraping edges meter oil, while the ring-to-groove contact conducts heat away from the piston crown.
What happens if it’s worn or broken ⚠️
Expect hard starts, low compression, loss of power, blue smoke, rising oil consumption, crankcase blow‑by, fouled plugs, and catalytic converter damage. Severe cases cause scoring, piston slap, and even seizure.
Fitment and build quality ✅
Precision-ground steel/ductile iron, correct tension, and matched end gaps for factory-like sealing. Ideal for gasoline or diesel applications requiring OE-profile rings.
Installation tips
Hone to proper crosshatch, measure end gap in-bore, stagger ring gaps ~120°, follow top/second orientation marks, lube lightly, and perform a controlled break-in.
Maintenance
Use clean oil of the correct grade, change filters on schedule, and avoid overheating to extend ring and cylinder life.