Project Import: 2005 Subaru STi Piston Failure

[shades2]

STi has forged rods, but not forged pistons standard. The ring lands would have cracked leading to piston failure. Forged pistons are the way to go if you're developing a lot of power or you risk a fairly catastrophic piston failure.

[NSX00000]

Looks like somebody miss-shift or beat the shit out of it.

[urmomisfineinbed]

Seems pretty common for boxers

[sergsrt8]

Lol only 100K miles and the pistons are shot. I thought imports were reliable...

[Sandeep9201]

now im really confused. evo or sti.....

they both seem like they break a lot!

[Projectimportcom]

@Sandeep9201 with proper care and maintenance they will last, just cant neglect it.

[ignit]

@Projectimportcom Exactly! Any vehicle is going to "break" without proper care and attention. Especially a performance car like an Evo or an STi. They are built to be driven hard and in turn maintenance is vital!

[adidas2284]

@Sandeep9201 I've also heard the 08's and up (I think all the way to 10's) had a bad tune as well. STI pistons hold up decently to mild performance (400 hp) w/ proper tune and maintenance like Projectimportcom said. They have hypereutetic pistons that don't like a lot of boost or detonation. If you're that worried about it, either buy and older one and have the engine rebuilt w/ forged internals or find a blown shortblock cheap and build it up like I plan on doing.

[bob505470]

@Sandeep9201 they only break if you dont know what you are doing. and the sti is a beter car

[AtherSpooner]

@Sandeep9201 ive drive a 2001 Bugeye STI now 216000 km. And a 2006 Hawkeye STI now with 146000km. They run and run and run.

My Evo 7 goes 35000km and then i crashed it against a tree. The tree was much stronger ;-)

[sqweekyknee]

L2 ftw

[Dualshock21]

only 2 pistons?

[Disaster646]

@Dualshock21 is a boxer motor, the other two pistons are on the other side opposite to those,

[blake1405]

Ouuuuuch.