Spun a bearing, need some guidance on engine replacement
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This is a discussion on Spun a bearing, need some guidance on engine replacement within the Everyday Impreza Talk forums, part of the Community - Meet other Enthusiasts category; Well unfortunately, yesterday, due to an unexpected situation my stock 04' WRX (43k mi. engine) got a spun bearing. So ...

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    Spun a bearing, need some guidance on engine replacement

    Well unfortunately, yesterday, due to an unexpected situation my stock 04' WRX (43k mi. engine) got a spun bearing. So I've decided to go ahead an replace the shortblock, my question is how much work will it take to properly replace by old 2.0 shortblock with an 2.5 Sblock? Or should I just stick with the 2.0?


    Thanks in advance guys seriously. Plus, if you guys have a better plan that you think I should go with, please do tell.


    Thanks again.
    Pic to soon to come ...... 19 yrs old. Drive a Subbie( Im a newbie). 3rd Year Of college going to third.

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    Hybrid build time

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    Registered User poly_poly-man's Avatar
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    While you're replacing the shortblock anyway, you might as well throw in an ej25. Just remember to use the fancy headgaskets and all that and you'll be good. This will require a tune, but that's not bad.

    EDIT: btw, what oil were you using?
    My big thread: The Used WRX Buying Checklist - Please Contribute!

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    Quote Originally Posted by poly_poly-man View Post
    While you're replacing the shortblock anyway, you might as well throw in an ej25. Just remember to use the fancy headgaskets and all that and you'll be good. This will require a tune, but that's not bad.

    EDIT: btw, what oil were you using?
    The oil I used was 5w-30 Mobil1, first time using that brand. But yea, I guess Hybrid time it is. As for the tune, since the tune is a requirement, how much is tune exactly?


    -Sorry for all the questions. Its just that I have no knowledge about hybrid build and I plan on doing this sometime this week. (The money is coming from my friend who missed a shift when redlining. He's paying for the shortblock)
    Pic to soon to come ...... 19 yrs old. Drive a Subbie( Im a newbie). 3rd Year Of college going to third.

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    The Default One SeattleJeremy's Avatar
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    Another nail in the 5w-30 Mobil1 coffin. Don't use that stuff in Subaru engines.

    What Poly˛ means by Fancy head gaskets is use the 2.5L head gaskets on the 2.5L block and the 2.0L heads.

    Here is some information to get you started.
    Hybrid build/rebuild info - Subaru WRX Forum: WRX Forums

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    Registered Whippersnapper mustangtx63's Avatar
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    Sorry to hear man, glad I switched from M1...
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    Registered User poly_poly-man's Avatar
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    Mobil1 is good oil, but it runs thin. If you do use it, only use 0w-40 or 5w-40.
    My big thread: The Used WRX Buying Checklist - Please Contribute!

    My current car: 2002 WRB WRX Wagon.
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    Moderator   Sasquatch's Avatar
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    Quote Originally Posted by nunez07c View Post
    Well unfortunately, yesterday, due to an unexpected situation my stock 04' WRX (43k mi. engine) got a spun bearing.
    Not the original engine? Go hybrid. If the same happens here I'd go 2.5.

    Used M1 5W-30 for 7 years. With the new 19T top end the now worrying begins.
    Last edited by Sasquatch; 07-31-2011 at 06:24 PM.
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    It'l run fine without a tune but won't be charging down the road at full potential thats my current problem

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    The Default One SeattleJeremy's Avatar
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    Doing a Hybrid swap requires a tune. The 2.5L engine has 25% more air to burn. That's not to say it requires 25% more fuel, but it does require a bit more.

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    Registered User hachetman13's Avatar
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    Mine has a full still engine swap on stock wrx turbo and tune like I said not running at full but runs fine without damaging anything

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    You learn from your mistakes. Never doing this mistake again. But yea, how much does the tune usually cost???
    Pic to soon to come ...... 19 yrs old. Drive a Subbie( Im a newbie). 3rd Year Of college going to third.

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    Quote Originally Posted by nunez07c View Post
    You learn from your mistakes. Never doing this mistake again. But yea, how much does the tune usually cost???
    Depends on what tuners you have in your area. It can be anywhere from 200-600 from what I've seen.

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    Registered Whippersnapper mustangtx63's Avatar
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    Quote Originally Posted by Sasquatch View Post
    Used M1 5W-30 for 7 years. With the new 19T top end the now worrying begins.
    I had been using it for about 4 years once I started hearing of all the problems.

    Switched to Rotella T-6, couldn't be happier! (It's cheaper than M1, too )
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    Quote Originally Posted by mustangtx63 View Post
    I had been using it for about 4 years once I started hearing of all the problems.

    Switched to Rotella T-6, couldn't be happier! (It's cheaper than M1, too )
    A guy at Kragen told me unless I had a diesel, the Rotella T-6 is not recommended on a Subie although I have been using it for a while now....

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