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Old 08-10-2007, 03:19 PM   #1
edo2000
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Default hybrid engine project

grenade02 and I are trying to replace a blown 2.0L with a new 2.5L shortblock. Wish us luck. Any tips from those who have done it before would be welcome.

pics:






engine out!



new shortblock... believe it or not, Conti had one of these in stock!

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Old 08-10-2007, 03:36 PM   #2
AK_2.5RS
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is that Rain's new ride.
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Old 08-10-2007, 04:44 PM   #3
edo2000
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Nope. It's going to be grenade02's ride, if we ever get it running.
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Old 08-10-2007, 05:11 PM   #4
00Maddog
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you must block the pcv pipe that comes out of the drivers side of the passenger case half. nothing else i can think of really. pm me when you check/adjust your valves edo,

jerry
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Old 08-10-2007, 09:38 PM   #5
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were gunna get it runnin soon
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Old 08-11-2007, 12:20 AM   #6
edo2000
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Quote:
Originally Posted by 00Maddog View Post
you must block the pcv pipe that comes out of the drivers side of the passenger case half. nothing else i can think of really. pm me when you check/adjust your valves edo,

jerry
Thanks Jerry. I noticed that some people think it is important to plumb that pipe back into the breather hoses, but most just block it.

We've decided to go with the .051 cometic head gasket, recommended by Max at Gruppe-S to retain stock compr ratios, if you have any comments on that...

We also will probably buy more aggressive cams for the 2.0 heads, but we haven't pulled the trigger on that yet. Lots of expensive stuff... sti oil pump?

I'll definitely check with you on the valve lash adjustment... how would you like to fly down to Kenai, have dinner and fly back?
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Old 08-11-2007, 12:44 AM   #7
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Hey you should look into the 12mm JDM pump or Cobb has a modded 12mm pump. Both offer 20% more flow. Same peak pressure. If you do cams for this set up I would go with STi cams (stock) or do 264's. If you over cam it, it will spool late and just generally wont be as fun to drive. For valve lash check to see what the cam manufacturer reccommends.
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Old 08-12-2007, 04:50 PM   #8
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Quote:
Originally Posted by AWDBST View Post
Hey you should look into the 12mm JDM pump or Cobb has a modded 12mm pump. Both offer 20% more flow. Same peak pressure. If you do cams for this set up I would go with STi cams (stock) or do 264's. If you over cam it, it will spool late and just generally wont be as fun to drive. For valve lash check to see what the cam manufacturer reccommends.
Thanks awdbst, I'll look into those pumps. I didn't know that cams from 2.5L turbo(STI) heads would fit directly into the 2.0L heads. Can you confirm this?
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Old 08-12-2007, 04:54 PM   #9
AWDBST
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Yes they will if you search around people are useing them. They are a pretty decent upgrade from WRX cams. Also used STi cams go for about $250. The other thing with going with new cams is most of your buckets will probably have to be changes out. At $30 a piece that will add to your build too. But if you are doing it might as well do it all the first time around. When are you triing to have it up and running by?
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Old 08-12-2007, 04:56 PM   #10
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PM me what your final goals are for the car also. IE horse power or 1/4 mile et's etc.
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Old 09-05-2007, 01:10 AM   #11
edo2000
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Sorry, AWDBST, grenade02 was on the slope and I have been hooked up at work. As far as goals for the car: for it to start and run again ...

But seriously, we just want it to make decent power, 280-320whp. Not planning on upgrading the tranny for a while :crosses fingers:, so more power than that is not necessarily desirable .

To update our progress (or lack of it ) for those who are interested:

blown engine, ready for disassembly



here it is with the pan and rocker cover off, the bad rod bearing was easy to spot.



right hand head off - note the carbon-covered pistons



both heads and cams off


Last edited by edo2000; 09-05-2007 at 01:21 AM.
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Old 09-05-2007, 01:45 PM   #12
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I didn't know that wrx's had oil coolers. I thought only my car had an oil cooler. dagammut!
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Old 09-05-2007, 03:19 PM   #13
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hey guys, i know im new to this forum, and none of you know me. haha, im robert. i just saw this project and have a few things to let you think about. its funny, but the same thing pretty much happened to my mother-in-laws 2.0l 02 wrx, and my brother-in-law replaced it with a 2.5l. Everything went pretty well, but they have to replace the tranny, or the gear ratio. I sound like a noob, which i am in a way. I dont really know the difference or what exactly the did or still have to do. I wasnt there for the project, and only heard what my wife told me, but i can ask more if you want me too. Just something to be aware of. The 02 wrx was a daily driver, complete stock. Still is in a way. Its actually gonna be for sale once they fix the tranny. Its a blast to drive, but not a great daily driver for a 46 year old women who isnt interested in cars at all. she prefers her previous camry, blah. haha. good luck with the project though. im interested in seeing how it comes out.
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Old 09-05-2007, 04:32 PM   #14
edo2000
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Hey, Airborne, welcome to AKIC and thanks for the note. The original 02 WRX tranny should have worked, I guess it was having problems, so they needed to repair it also? Good to hear that their 2.5 hybrid swap worked out OK. At this point we're wondering if this thing will ever run again. We'll definitely post up, if/when we get it going.

Quote:
Originally Posted by AKlgt_Airborne View Post
hey guys, i know im new to this forum, and none of you know me. haha, im robert. i just saw this project and have a few things to let you think about. its funny, but the same thing pretty much happened to my mother-in-laws 2.0l 02 wrx, and my brother-in-law replaced it with a 2.5l. Everything went pretty well, but they have to replace the tranny, or the gear ratio. I sound like a noob, which i am in a way. I dont really know the difference or what exactly the did or still have to do. I wasnt there for the project, and only heard what my wife told me, but i can ask more if you want me too. Just something to be aware of. The 02 wrx was a daily driver, complete stock. Still is in a way. Its actually gonna be for sale once they fix the tranny. Its a blast to drive, but not a great daily driver for a 46 year old women who isnt interested in cars at all. she prefers her previous camry, blah. haha. good luck with the project though. im interested in seeing how it comes out.
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Old 09-06-2007, 12:36 AM   #15
Big-Sexy907
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Glad to see the car went to a good home. Sucks I didnt get it...
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Old 09-06-2007, 01:04 PM   #16
edo2000
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^^^^Thanks.

I think next time maybe we should choose one that isn't blown up. It's a great deal, until you start figuring what your time is worth.... then, maybe not so good.

But we wanted to learn more about subie mechanics, and we are definitely accomplishing that.
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Old 09-06-2007, 04:43 PM   #17
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Edo, be sure to check the heads out and double check that turbo. I feared that the motor was oil starved when the bearing went out if thats the case both of those components may be hosed as well.

I'd change the gear oils too, and strain the fluid for debris. That should give you a good idea of how much trans you have left.
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Old 09-07-2007, 04:10 PM   #18
edo2000
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Quote:
Originally Posted by RaiN View Post
Edo, be sure to check the heads out and double check that turbo. I feared that the motor was oil starved when the bearing went out if thats the case both of those components may be hosed as well.

I'd change the gear oils too, and strain the fluid for debris. That should give you a good idea of how much trans you have left.
The cam journals all looked great, I doubt it was oil starved. Seems like detonation causes a lot of spun bearings on these engines; maybe that is what happened. I also understand you can get local oil starvation on the rod bearings due to high rpms, but that shouldn't damage the heads.

Good idea on the tranny and diff fluids. We were planning to change those. Tranny felt pretty good on the initial checkout.
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Old 09-07-2007, 05:06 PM   #19
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There is no refunds if the vf-34 is fubar . Good luck with your project and hope all goes well.
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Old 09-07-2007, 06:17 PM   #20
edo2000
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Quote:
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There is no refunds if the vf-34 is fubar . Good luck with your project and hope all goes well.
This is a different car. Your vf-34 is still working great in my daily driver. This car has an 18G that has a little radial shaft play. We're thinking of possibly shipping it to deadbolt for a rebuild & pnp.

I hope things are going well in Georgia.
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Old 09-07-2007, 07:40 PM   #21
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Quote:
Originally Posted by edo2000 View Post
This is a different car. Your vf-34 is still working great in my daily driver. This car has an 18G that has a little radial shaft play. We're thinking of possibly shipping it to deadbolt for a rebuild & pnp.

I hope things are going well in Georgia.
Deadbolt is where I got my 20g from, great dude to buy from. GA is alright, really humid down here and full of people who drive like idiots. Good thing is there is like 15 tuners within a 300 mile radius and it won't be 40 below this winter for me. After I've done my time here I plan on going back up to Fairbanks. Still got parts for sale if any of you guys need rotors, bushing, or an uppipe.
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