12006AD550 Subaru PISTON SET,0.25OS, Price: 39.85$, Weight: 0.343kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Subaru |
12006AD550 |
PISTON SET,0.25OS |
0 |
0.343 |
2-3 |
39.85$ |
| Not Available | ||||||
Compatibility
| Body | Engine | Vehicle Grade | Market | Model Year From | Model Year To | Train | Diagram |
|---|---|---|---|---|---|---|---|
| XUV | 1.5L EMPI DOHC NA | 15I | Japan | 04.2010 | 11.2011 | ﾌﾙﾀｲﾑ4ﾘﾝｸﾄﾞｳ | View |
Oversize Engine Piston Set (0.25)
This precision oversize piston set is needed when a cylinder has been worn, lightly scored, or re-bored during an engine rebuild. By using a 0.25 oversize piston, the engine can restore correct piston-to-wall clearance, regain compression, and run smooth again ?.
How It Works
The piston moves up and down inside the cylinder, turning combustion pressure into crankshaft rotation. With the correct rings installed, it seals the combustion chamber, controls oil on the cylinder wall, and transfers heat into the cylinder bore. The oversize diameter matches a freshly machined cylinder so the seal is tight and efficient ✅.
When the Piston Is Worn or Damaged
If a piston is cracked, collapsed, or heavily scuffed, the engine may suffer low compression, blow-by, oil burning, piston slap noise, and loss of power. In severe cases it can seize, damage the cylinder, and contaminate the oil with metal, risking bearings and turbo (if equipped) ⚠️.
Compatibility
- Subaru Impreza