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2008-2010 2.5ltr Engine Failures

Old 28 August 2018, 10:24 AM
  #2011  
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Originally Posted by ThePredator View Post
is it possible/safe to setup 8k revs or higher on forged 2.5l ?
how do they setup jdm 2.5l - lichfield ones
A mapper can change the rev limit in the ECU easy enough and in theory a forged 2.5 could rev past 8k rpm, but you'd have to ask why? With the larger 2.5 engines the torque and peak power is made lower down the rev range. By the time you reach 8k you really ought to be in the next gear using the torque band.
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Old 28 August 2018, 08:49 PM
  #2012  
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Looks like the USA & Canada customers getting some money back.
https://www.carcomplaints.com/news/2...-lawsuit.shtml
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Old 28 August 2018, 09:49 PM
  #2013  
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By the time you are at 8200 8400 rpm then the torque is not there any more , best torque around 6000 or so plus a bit rpm , my jdm sti reved to silly high revs but felt you were loosing the power as out of the torque band and better off changing gear earlier
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Old 28 August 2018, 10:22 PM
  #2014  
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Originally Posted by ThePredator View Post
well porsche use bigger engines and revs 9k , audi over 8k etc
i like how jdm sti revs and scream
Porsche and Audi design their engines for high RPMs. The JDM cars have Twinscroll turbo's but smaller capacity so require the rev spread.
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Old 18 October 2018, 09:08 PM
  #2015  
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Will this still affect cars imported from Japan, I might go and look at a 2011 STI A line???
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Old 18 October 2018, 10:44 PM
  #2016  
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Originally Posted by Imotepify View Post
Will this still affect cars imported from Japan, I might go and look at a 2011 STI A line???
https://www.gtnet.co.jp/car_info/imp...n/index_en.php

As it comes with the 2.5L engine it will have the same problems.
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Old 07 January 2019, 08:10 PM
  #2017  
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Default Off side Head gasket failure at 117k miles


Another blown head gasket. 117k miles on V-power though so did well. You can still see the honing on the bored and no sign of piston crown failure.
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Old 07 January 2019, 08:17 PM
  #2018  
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Originally Posted by terzoscooby View Post

Another blown head gasket. 117k miles on V-power though so did well. You can still see the honing on the bored and no sign of piston crown failure.
not bad going in all reality, whats the plans now?
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Old 07 January 2019, 11:36 PM
  #2019  
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Given the good condition of it I am getting the heads checked and I am going to do a magnified inspection of the pistons. If all is good I am inclined to put it back together.

Am I mad not dropping forged pistons in just didnít want to touch bottom end as it ran like a sewing machine.
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Old 07 January 2019, 11:44 PM
  #2020  
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Personally with that mileage in mind I'd want a rebore, hone and some oversized forged pistons fir peace of mind.
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Old 07 January 2019, 11:50 PM
  #2021  
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Originally Posted by terzoscooby View Post
Given the good condition of it I am getting the heads checked and I am going to do a magnified inspection of the pistons. If all is good I am inclined to put it back together.

Am I mad not dropping forged pistons in just didnít want to touch bottom end as it ran like a sewing machine.
whilst its apart in my opinion you would be mad not to refresh everything, imagine how you would feel paying for it to be bolted back together for it to fail again. false economy in my opinion.

if you plan on keeping the car then do a complete rebuild from scratch and get everything checked as its not just the pistons that can fail on the 2.5 its the actual block aswell.
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Old 07 January 2019, 11:56 PM
  #2022  
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definitely do pistons , the bottom end may seem fine , but you wonít know with out stripping it , in both of my fsti when hg went one bottom end went with in a year as i did not get it done , so turned into twice the price , on the other fsti i said strip bottom end , bottom end sounded fine , it was not , crank shaft was polished but bearings had gone i think it was number 3 , itís false economy not doing it all
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Old 08 January 2019, 12:42 PM
  #2023  
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I hear the comments and it all makes sense but so far I havenít found any signs of wear. Even the cam tips are exceptionally perfect. V-power and fully synthetic race oil from run in has so far done the job.
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Old 08 January 2019, 01:50 PM
  #2024  
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you wonít till you strip it , the failure rate of the 2.5 bottom end after hg failure is around 75 per cent , the 2 litre is much less prone , as above i had two go , even the engine builder said it sounded ok , it was only found when it was stripped , otherwise you could be on a bit of a ticking failure , the cost if the bottom end goes will be the hg cost plus bottom end , so surely best done in one whole job as itís cheaper in the long run , your choice
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Old 16 January 2019, 09:05 PM
  #2025  
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Can only concur with above. Total false economy not doing the bottom end if it's already out. Unless you're about to sell it, of course. If you are just going to replace the gasket, FFS put studs in at the very least!
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Old 19 January 2019, 08:48 PM
  #2026  
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New head bolts and gaskets going in and heads skimmed. We will see how long it lasts.

Unless it destroys the block I am still better off.
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Old 25 January 2019, 10:10 PM
  #2027  
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i would definitely do forge pistons and head studs.
Also seen a few pipe up pipes cracked/split at bracket weld.So change that.Tony
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Old 02 April 2019, 01:20 PM
  #2028  
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Subaru of America to give customers of 2012-2017 models extended warranties and refunds for engine repairs 😳
https://www.torquenews.com/1084/suba...mpression=true
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Old 04 April 2019, 06:49 PM
  #2029  
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Is this US only? I wouldnt mind an extended 8yr warranty FOC

Who is eligible?
Anyone who leased or purchased a 2012-2017 Subaru Impreza WRX or WRX STI

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Old 04 April 2019, 07:33 PM
  #2030  
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Originally Posted by Gary Tractor boy View Post
Subaru of America to give customers of 2012-2017 models extended warranties and refunds for engine repairs 😳
https://www.torquenews.com/1084/suba...mpression=true
cos they were having the living crap sued out of them.
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Old 08 April 2019, 07:06 AM
  #2031  
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Originally Posted by terzoscooby View Post

Another blown head gasket. 117k miles on V-power though so did well. You can still see the honing on the bored and no sign of piston crown failure.

117k miles!!! I've never owned a car with that many miles on it lol what year is the car??

so well done
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Old 08 April 2019, 08:23 AM
  #2032  
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One of of the first MY11 cars so late 2010.
All back together now and another 2000 miles in the clock.
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Old 08 April 2019, 09:55 AM
  #2033  
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Originally Posted by terzoscooby View Post
One of of the first MY11 cars so late 2010.
All back together now and another 2000 miles in the clock.
unless you've owned a car from new, or almost new, you'd be thinking at the back of your mind hows it been treated and looked after.

117k miles is good going, as its above average mileage.

but all will be good now
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