Im sort of shocked as well, didnt expect it to detonate so early.
Ill have to check out the plugs and inspect everything, dont want to buy new pistons again after this rebuild, one time detonation is already too often
Thanks tom!
Printable View
plugs could do it but you should have noticed detonation, its really obvious.
doubt its the catch-can setup
The car got tuned first time end of last year i think.
Then i got new exhaust which allowed more boost and drove around like that for about 2 or 3 months, when adrain ran the first run before he tuned it he said it was running lean so maybe the detonation happened a few weeks ago and its just taken a while for the crack or whatever to show properly......
i think it might have been either on its way from previous old crappy tune, or the gapping on the plugs were way out
Could it have been a small detonation that just caused a crack in the ring land and when i gave it a boot the other day it decided to finally break?? Because when i first started to notice the problem it was minor and just got worse and worse the more i drove, first i thought i was getting paranoid when i heard the very slight wrx noise then as i got closer to home it was louder, i then drove 5 min down the road that day and noticed smoke starting to pour out of my catch can.
Maybe if im lucky its just a head gasket but i dont think im that lucky.....
when r u gonna pull the head off for a look?
Im going to start on it tonight, was going to do it last night but it was getting late after all the tests
Ill keep this thread updated so you can follow if you want, i think it might be starting to get into the wrong section on the forum though, mods can move it to forced induction or technical if they want.......
let me know if you want me to drop down the road and help man
Yea it could have been because it was running lean for so long, i did do a road trip to sydney running lean aswell...... Will find out soon!
Thanks man! Your always welcome to just come around and have a look if you want!
Will let you know if i need help :thumbsup:
Looks pretty clean imo
http://img16.imageshack.us/img16/1893/dsc00199fol.jpg
Yes, a little lower in the compression will do wonders for reliability.
If the bores are damaged from the pistons,
It's unlikey you'll get away with stock bore pistons.
If you have to hone it so much that the piston to bore clearence is compromised, you're better off using the 1st or 2nd oversize.