2.5 STi HG issue question
#5
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Nothing to stop it going again
had mine done under warranty and it failed again within 30k miles ![Cry2](https://www.scoobynet.com/images/smilies/cry2.gif)
I have now saved the £3700 needed to sort it out properly FORGED
I expect subaru only did the bare minimum e.g gaskets, probably didn't bother with head skimming or even check never mind replace bearings
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I have now saved the £3700 needed to sort it out properly FORGED
I expect subaru only did the bare minimum e.g gaskets, probably didn't bother with head skimming or even check never mind replace bearings
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#6
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as above on the 2.5 crank bearings need doing too but subaru won't do them , uprated hg gasket important plus head studs not bolts or the same thing is likely to happen again , even when all of that is done it still some times goes wrong , and then it's forged time
#7
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Had mine go at 32,000 miles and it's on it's way again at 68,000 miles, i had ARP bolts fitted when it went the first time, going to forge it this time and hopefully put it to bed for good.
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#9
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Headgasket is on it's way out again, i had a leaking radiator last year so had it replaced with a Mishimoto one. After it had been fitted i kept noticing coolant was leaking out of the overflow pipe on the top of the radiator so took it back to the main dealers who'd fitted the rad. When they tested it they found the coolant system was being pressurised under boost which is exactly the same symptoms as the first time it went. When i had it replaced the first time i had head skimmed, ARP bolts and steel headgasket fitted.
#11
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It's not coming from the cap mate, it's leaking from the small black pipe on top of the rad where it joins to the fitting, i've fitted 2 small jubilee clips for now to stop it, it'll have to do till i get it rebuilt.
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#12
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sorry just clarifying , the pressured expansion tank has a pipe coming out of the top of the tank , the flow to that pipe is controlled by the expansion tank cap spring as pressure builds then the coolant flows out to non pressured tank if the pressured cap spring is weak too much coolant flow but it may not be your issue
#13
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Struggling to see how a forged engine is going to stop head gaskets going?
Closing the block deck or pinning it, cosworth or rcm gaskets and uprated head studs yes.
Closing the block deck or pinning it, cosworth or rcm gaskets and uprated head studs yes.
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Tuners have been doing them for years to that power level with no issues.
#17
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i heard the warning up and cooling down process is where the gaskets move between block and head , funny the 2.5 is more prone than the 2 litre as apart from bigger pistons the set up is pretty similar with a few changes for certain models
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The steel liners are a lot thinner on the 2.5's
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There doesn't seem to be a hard a fast rule as to why they fail. I hear various things blamed for it, but you see cars that have been babied failed and those that have been ragged to death not.
Just seems to be pot luck.
#20
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As boosted said, the liners on a 2.5 are pretty thin.
There doesn't seem to be a hard a fast rule as to why they fail. I hear various things blamed for it, but you see cars that have been babied failed and those that have been ragged to death not.
Just seems to be pot luck.
There doesn't seem to be a hard a fast rule as to why they fail. I hear various things blamed for it, but you see cars that have been babied failed and those that have been ragged to death not.
Just seems to be pot luck.
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ah right, my old engine was fooked (2.0) taper ont eh cylinders so ended up with a block out of a hatch sti iirc although as said closed deck converted
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