('98-'00) piston damage - Subaru Forester Owners Forum
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post #1 of 13 (permalink) Old 12-03-2012, 04:07 PM Thread Starter
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piston damage

looks like it ran like this since it was unseen until i cleaned all the carbon from surface. the head shows no such markings. but this motor came as a spare with the car that was supposedly purchased in running condition from a junk yard. yet i have no old timing belt or gaskets or valve covers and heads were seperate. just the previous owners word which im beginning to feel pretty cheated. if i spend 500 bucks putting this motor back together and it wraps or blows, he wont be getting any subaru love from this guy.


How do I change my odometer to read "IRRELEVANT"
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post #2 of 13 (permalink) Old 12-13-2012, 04:11 PM Thread Starter
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Put my valves and springs in today, all I can say is what a ***** that was. Tomorrow I hope to check the shims then bolt heads back onto block

How do I change my odometer to read "IRRELEVANT"
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post #3 of 13 (permalink) Old 12-14-2012, 03:18 AM
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THose pistons are shot...
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post #4 of 13 (permalink) Old 12-14-2012, 07:04 AM
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not necessarily.
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post #5 of 13 (permalink) Old 12-14-2012, 07:07 AM Thread Starter
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Im gonna run it

I'm also planning on just sanding a little off the top of the valves rather than ordering new shims. i just checked my clearences and i would need a lot of shims

How do I change my odometer to read "IRRELEVANT"

Last edited by no694terry; 12-14-2012 at 09:39 AM.
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post #6 of 13 (permalink) Old 12-19-2012, 06:37 AM
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That's a bad idea. I know someone that did the exact same thing. A couple months later he showed me what a piston broken into 10 pieces looks like...


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post #7 of 13 (permalink) Old 12-19-2012, 07:48 AM
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not necessarily.
Cause you can see stress fractures with your xray vision...
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post #8 of 13 (permalink) Old 12-19-2012, 07:48 AM
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im gonna run it

i'm also planning on just sanding a little off the top of the valves rather than ordering new shims. I just checked my clearences and i would need a lot of shims
smrt...
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post #9 of 13 (permalink) Old 12-19-2012, 12:12 PM Thread Starter
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well the heads are all set, have to clearences set, most a little sloppy harley style and i'm still not worried abou that piston. That happened years ago, that block has eatin two sets of valves already from timing belt failures.

I bet the motor i pulled out that was running when i pulled it has bent valves. It had a pretty good miss that i figured was from the head gasket but when i lined up the crank none of the cams lined up even after i rotated the crank again and again and again, each cam was several teeth off.

How do I change my odometer to read "IRRELEVANT"

Last edited by no694terry; 12-19-2012 at 12:17 PM.
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post #10 of 13 (permalink) Old 12-26-2012, 08:02 AM
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Cause you can see stress fractures with your xray vision...
oh please, move along troll.
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post #11 of 13 (permalink) Old 12-26-2012, 09:10 AM
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^^ that troll is right.

Granted, since the engine was already running with them in there for some time. The likely hood of one shattering into many pieces is small if it hasn't happened by now.

But the edges are a great place to propagate hot spots to cause detonation.

His - 08 X Prem 5mt
Hers - 08 X 4EAT
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post #12 of 13 (permalink) Old 12-26-2012, 10:31 AM
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oh please, move along troll.
If you'd trust it, well then, I'd never trust you... pretty simple...
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post #13 of 13 (permalink) Old 12-26-2012, 11:45 AM Thread Starter
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I ended up just buying another engine. But I still need a 97-98 dohc valve cover. The motor I got had a crack right cover, my other set of covers are off a 96

How do I change my odometer to read "IRRELEVANT"
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  Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Engine and Exhaust > EJ25 - 2.5L Non-Turbo (1998-2010)

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