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-   ScoobyNet General (https://www.scoobynet.com/scoobynet-general-1/)
-   -   2008-2010 2.5ltr Engine Failures (https://www.scoobynet.com/scoobynet-general-1/828990-2008-2010-2-5ltr-engine-failures.html)

Littleted 17 March 2011 11:44 PM

So far ive not seen any 2011s with this issue, Now its still the same engine, but with a diff Map

I wonder when the first will go.

Littleted 17 March 2011 11:52 PM

http://answers.yahoo.com/question/in...1074355AAAThyY

intresting reading

salsa-king 18 March 2011 12:11 AM

have we got the same engine as the hawk eyes?

Littleted 18 March 2011 10:30 AM

Yes i think so Salsa

scooby L 18 March 2011 11:05 AM

Same engine, slightly different piston design I think.... The Hawks have a domed piston and the hatches were released with a new flatter design (meant to be quieter with less chance of piston slap)

bushiwarrior 18 March 2011 09:07 PM

Is it just hatches with the generic factory maps that have went pop or has there been custom map hatches gone too?

Alan Jeffery 19 March 2011 08:23 AM


Originally Posted by juggers (Post 9940867)
Cosworth forged pistons won't solve the issue even the STI cosworth press car went pop and thats full of cosworth bits ;)

The 2.5l engine has an inherant issues which is one of the reasons why Litcho has stopped with the type 25.

Sorry, I don't know where you're coming from, but the main issue is the weakness of the original pistons.
It's a combination of factors that led to the situation, but the actual engine failures are due to the actual pistons not putting up with it.

What's your personal experience of the Cosworth press car?

Rocket launcher 19 March 2011 03:05 PM


Originally Posted by juggers (Post 9940867)
Cosworth forged pistons won't solve the issue even the STI cosworth press car went pop and thats full of cosworth bits .

do you have any proof or back up of this

scooby L 22 March 2011 04:35 PM


Originally Posted by bushiwarrior (Post 9942393)
Is it just hatches with the generic factory maps that have went pop or has there been custom map hatches gone too?

Just the generic mapped cars so far (bar one..but that was not the map that caused the failure)

chopperman 22 March 2011 08:41 PM


Originally Posted by Alan Jeffery (Post 9943009)
Sorry, I don't know where you're coming from, but the main issue is the weakness of the original pistons.
It's a combination of factors that led to the situation, but the actual engine failures are due to the actual pistons not putting up with it.

What's your personal experience of the Cosworth press car?

Ive just taken my RB320 to the stealers with a white/blue smoke issue on start up, only 16k on the clock. While talking to the mechanic about all things scoob he mentioned the cossy was eating crankshafts. Make of that what you will :)

vulnax999 22 March 2011 08:51 PM

I've had comments from a Subaru approved garage ( not a dealer ) that the crankshafts on the hatch are the next thing to go after the pistons... I think i've only heard of 1 or 2 of the failures being due to crank / bearings?

salsa-king 22 March 2011 10:52 PM

is the Hatch 2.5 the same as the hawk eye 2.5 engine?

if so, where are the issues coming fom in the hatch but not the hawk eye?

rob84 22 March 2011 10:54 PM


Originally Posted by vulnax999 (Post 9949230)
I've had comments from a Subaru approved garage ( not a dealer ) that the crankshafts on the hatch are the next thing to go after the pistons... I think i've only heard of 1 or 2 of the failures being due to crank / bearings?

Oil starvation.... As the land fractures it damages the bores so you end up with quite a rapid comsumption of oil to the point its nearly dry so picks up on a bottom end bearing.

chopperman 23 March 2011 01:19 PM


Originally Posted by chopperman (Post 9949198)
Ive just taken my RB320 to the stealers with a white/blue smoke issue on start up, only 16k on the clock. While talking to the mechanic about all things scoob he mentioned the cossy was eating crankshafts. Make of that what you will :)

Well my smoke seems to be just a bit of over fueling and i think i may have bought some dodgy v-power as it started after filling up. Engine is as solid as a rock :thumb:

Littleted 23 March 2011 01:38 PM

whats diff about the RB, is it still the same block Pistons etc ? but with 320 BHP

I see the brakes are diff are they better than the brembo 4 pots ?

chopperman 23 March 2011 03:23 PM


Originally Posted by Littleted (Post 9950277)
whats diff about the RB, is it still the same block Pistons etc ? but with 320 BHP

I see the brakes are diff are they better than the brembo 4 pots ?

STI with about 7k worth of goodies.
I only posted here because i had an issue and it uses the 2.5L engine. Turns out mine was just dodgy v-power and engines fine.

honeybadger 24 March 2011 03:20 PM

such a tragic shame that Subaru is letting down it's fans like this.

MOTORS S GT 24 March 2011 05:56 PM

whats diff about the RB, is it still the same block Pistons etc ? but with 320 BHP

No difference, same basic engine as the Hawk 2.5 STI which its based on, & the 2.5 Hatches.

I have just in the last month, forged built a RB320, 06 STI & a 08 STI, & they all share the same OE piston, & they all had at least one piston with ring land issues, although that is not the reason they were in for work, just a forged build to future proof them.
Plus they were in std unmodified form, & serviced as per recomendations.

paulT25 24 March 2011 06:15 PM


Originally Posted by juggers (Post 9940867)
Cosworth forged pistons won't solve the issue even the STI cosworth press car went pop and thats full of cosworth bits ;)

The 2.5l engine has an inherant issues which is one of the reasons why Litcho has stopped with the type 25.


What do you mean about Litchfield stopping the T 25.
As far as I know , he has plans off sorts for a new model , I am having my 2.5 Cosworth rebuilt , and very simular to his latest T25 spec engine.

If you google Type 25 I am sure that his new web site come up , which you can register on!

Paul.

paulT25 24 March 2011 06:20 PM

I forgot to mention, in my last post that my engine is the Cosworth T25 Litcho, 2007 model.
Valve drop , siezed engine , with broken rings, and oval bores.
And the engine damage [ issues] occured while he was at the helm, Ouch!

vulnax999 24 March 2011 08:34 PM


Originally Posted by paulT25 (Post 9952371)
I forgot to mention, in my last post that my engine is the Cosworth T25 Litcho, 2007 model.
Valve drop , siezed engine , with broken rings, and oval bores.
And the engine damage [ issues] occured while he was at the helm, Ouch!

I guess he's paying for it then!

paulT25 24 March 2011 09:41 PM

Not a penny , Out of warrenty du eto mods that have been done over the 3 years, Just a case of bad luck .It was at Iains for a check up for loss of power when boost came on, So in some way lucky it happend when he was driving at a slow speed .

I could have been driving at a greater spead and hold the block? who knows , just bad.

chopperman 25 March 2011 06:59 PM


Originally Posted by MOTORS S GT (Post 9952330)
whats diff about the RB, is it still the same block Pistons etc ? but with 320 BHP

No difference, same basic engine as the Hawk 2.5 STI which its based on, & the 2.5 Hatches.

I have just in the last month, forged built a RB320, 06 STI & a 08 STI, & they all share the same OE piston, & they all had at least one piston with ring land issues, although that is not the reason they were in for work, just a forged build to future proof them.
Plus they were in std unmodified form, & serviced as per recomendations.

What were the ring land issues, was it the same ring land and or the same piston in all these engines. Was it a compression ring or oil control ring??

joz8968 25 March 2011 07:57 PM

Who the hell would buy a Scooby? :(

WE must ALL have a screw loose [pun intended], buying into this marque. :cuckoo:

MOTORS S GT 25 March 2011 07:59 PM

This was from a 06 2.5 STI, & is a typical failure, cyl No2, but its random, could be any cyl.
http://i266.photobucket.com/albums/i...failure003.jpg
http://i266.photobucket.com/albums/i...failure004.jpg

muzzler 26 March 2011 09:41 AM

What power was it running?

MOTORS S GT 26 March 2011 10:55 AM

That piston was from a std UK spec 2.5 STI, with 34,000 miles on the clock.

acstua 26 March 2011 12:37 PM

what would the symptoms be if that started happening to an engine? (yes im an idiot :D )
Oil use?

Alan Jeffery 26 March 2011 07:30 PM


Originally Posted by acstua (Post 9954977)
what would the symptoms be if that started happening to an engine? (yes im an idiot :D )
Oil use?

It would rattle and smoke, and yes, it would use oil!
It would likely start out subtle and get worse every day.

wigsworld 27 March 2011 12:28 PM


Originally Posted by Littleted (Post 9941071)

Yeah it was interesting to read that, sounds like the problems with the 2.5 come from being badly mapped or modded. I remember speaking to Iain Litchfield and he said the 2.5 is fine for 300 bhp but if you want anymore your better off with the 2.0 jdm.


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