Need to check exactly what is covered and replaced with what. 2.5 has known ringland and headgasket issues, doe the warranty cover that? if so what does it cover, like for like or a specialist rebuild.
Not sure where you got the impression the 2.5 is quieter than the 2.0 because that's not true?
Its all about the exhaust system on both. Need to have some of the cats removed and you'll find a big difference 😉
Back box would be a good start, but you wont increase cabin noise without external going up as well
tbh im not convinced there is one cause. I heard the map blamed before, but then remapped cars go and some unmapped don't. and a proper map is typically safer than the generic map
Oil starvation causes failures on all engines 2.0 and 2.5
There's alot of theorys about why they go and not much hard fact.
Given it affects even the new ones then i dont think subaru have learned anything from there flaws.
An interesting discussion i have to say (maybe need its own thread?)
I'm not actually sure what the ring gaps are on the 2.0 pistons and the 2.5? so you may have a better understanding than me on that.
The material is the same as the 2.0, (cast hyperwhatever since 2003) on the 2.5 so unlikley to be an issue i would say or it would have cropped up on the 2.0.
Headgasket failure could be the symptom rather than the cause, Overboost lifting the head maybe, although given wrx's and sti's are failing and stock cars i dont think thats the reason.
Heat is def a big issue. the 2.5 def runs hotter than the 2.0. But im not sure it would be enough to cause the issues.
It could well be a combination of all of the above 🙂
What are you trying to achieve? the ecu controls everything, no need to run anything else untill you get to the point of running big power.
All this bolt on crap is a waste of money and half the time damages the engine.
Yes mate, tein flex z, although the side on pics are when it had the pedders. Sits pretty much the same. I'll try and get some up to date pics tomorrow, although its ditched at the min lol