12006AD510 Subaru PISTON SET,0.25OS, Price: 35.64$, Weight: 0.497kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Subaru |
12006AD510 |
PISTON SET,0.25OS |
0 |
0.497 |
7-10 |
35.64$ |
| Not Available | ||||||
Originals
| Make | Number | Name | Availability | Weight, kg | Processing, days | Price | |
|---|---|---|---|---|---|---|---|
| Subaru |
PISTON SET,0.25OS
|
50 |
0.572
|
2-3
|
36.23$
|
Compatibility
| Body | Engine | Vehicle Grade | Market | Model Year From | Model Year To | Train | Diagram |
|---|---|---|---|---|---|---|---|
| ﾜｺﾞﾝ | 2.0L EMPI DOHC NA | I | Japan | 04.2011 | 10.2013 | ﾌﾙﾀｲﾑ4ﾘﾝｸﾄﾞｳ | View |
| Body | Engine | Vehicle Grade | Market | Model Year From | Model Year To | Train | Diagram |
|---|---|---|---|---|---|---|---|
| ﾜｺﾞﾝ | 2.0L EMPI DOHC NA | XS ﾌﾟﾗﾁﾅ(-B) | Japan | 09.2007 | 09.2010 | ﾌﾙﾀｲﾑ4ﾘﾝｸﾄﾞｳ | View |
| Body | Made For Region | Engine | Vehicle Grade | Market | Model Year From | Model Year To | Diagram |
|---|---|---|---|---|---|---|---|
| SEDAN | RHD | 2000CC EMPI DOHC NA & LPG | 20RS | Europe/General | 04.2008 | 09.2011 | View |
| Body | Made For Region | Engine | Vehicle Grade | Market | Model Year From | Model Year To | Diagram |
|---|---|---|---|---|---|---|---|
| WAGON | LHD | 2000CC EMPI DOHC NA & LPG | 20I | Europe/General | 05.2010 | 11.2014 | View |
Oversize Engine Piston Set (0.25 mm)
When a Subaru boxer engine is rebuilt, the cylinder walls are often lightly bored or honed to restore a perfect round shape. This 0.25 mm oversize piston set is needed to match that new cylinder size, bring compression back, and stop oil consumption. It’s a smart choice for a fresh rebuild after high mileage, overheating, or ring wear 🔧.
How It Works
The pistons ride inside each cylinder and move up and down with the crankshaft. They seal combustion with their rings, transfer power through the connecting rods, and help control oil on the cylinder wall. Correct oversize clearance keeps the piston stable, quiet, and efficient under load ⚙️.
What Happens If It’s Worn or Damaged
- Low compression, hard starting, weak acceleration
- Blue smoke, rising oil use, oily spark plugs
- Piston slap noise, knocking, and poor fuel economy
- Scored cylinder walls that can ruin a rebuild
Installation Notes
Always confirm bore size, piston-to-wall clearance, and ring end gap during assembly. Use proper break-in oil and follow a careful run-in to seat the rings ✅.
Compatibility
- Legacy
- Impreza
- Forester
- Exiga