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Old 12-30-2010, 05:42 PM   #1
averagebob
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Default 01 subaru legacy L 2.5 rebuild kit.

Ok well I recently purchased this car, over the past week I have noticed a rather good knock coming from the engine. It goes away when its warm so I thought it might be sloppy rings but comes back with throttle and certain RPM ranges, the engine idles fine so those facts point me toward a wrist pin\bearings.

Would a top end kit fix this? New pistons,rings,gaskets?

I have had 2strokes before and when they knock a kit fixes them....
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Old 12-30-2010, 08:17 PM   #2
BAN SUVS
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If it completely goes away when it's warm, it's probably piston slap. Nothing to fix.

If it's not actually going away, it may very well be rod knock, which is a major deal.
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Old 12-31-2010, 11:31 AM   #3
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Yes, you can fix piston slap... depending how bad it is you could replace the pistons. There are two different sizes available (A and B) both for the stock bore. The A size is slightly larger and has been used by the dealer as a fix for Piston slap. If you already have an A size piston then a new one may not do much good. The new pistons have a coating on the skirt which will help with long term wear.
If the bore is wore real bad then the problem may not completely go away. Complete short blocks from Subaru are about $1,800.

I'm in the middle of a rebuild right now and have researched this topic to death on multiple boards. My piston slap will go away completely when warm. Both drivers side pistons showed wear along the skirts so they both needed to be replaced.
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Old 12-31-2010, 11:37 AM   #4
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I meant the phrase as "no need to fix it" rather than "it can't be fixed."
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Old 12-31-2010, 11:40 AM   #5
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Quote:
Originally Posted by BAN SUVS View Post
I meant the phrase as "no need to fix it" rather than "it can't be fixed."
Very true! I was thinking the same thing.

I wouldn't have messed with mine either... but I had a leaking head gasket so I decided to do a bunch of stuff including replacing the offending pistons.

I also found a pulled head stud. Can you believe it? First ever for me working on these. I ordered a Timesert kit to do the repair. Should be interesting.
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Old 01-05-2011, 05:54 PM   #6
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Quote:
Originally Posted by BAN SUVS View Post
If it completely goes away when it's warm, it's probably piston slap. Nothing to fix.

If it's not actually going away, it may very well be rod knock, which is a major deal.
goes away when warm, sounds like its driver side front most piston. Gentle knocking when warming up and once and a while after warm but rare.

Quote:
Originally Posted by fornetti14 View Post
Yes, you can fix piston slap... depending how bad it is you could replace the pistons. There are two different sizes available (A and B) both for the stock bore. The A size is slightly larger and has been used by the dealer as a fix for Piston slap. If you already have an A size piston then a new one may not do much good. The new pistons have a coating on the skirt which will help with long term wear.
If the bore is wore real bad then the problem may not completely go away. Complete short blocks from Subaru are about $1,800.

I'm in the middle of a rebuild right now and have researched this topic to death on multiple boards. My piston slap will go away completely when warm. Both drivers side pistons showed wear along the skirts so they both needed to be replaced.
Jesus, so that's expensive for piston rings, bearings,gaskets. My olds was 450$ before shipping for pistons and all bearings.

I have been looking online for a piston\ring\gasket set but haven't found one for my year\model.

01, sub legacy L 2.5
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Old 01-05-2011, 07:12 PM   #7
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You won't find it all in one kit. The rebuild gaskets are around $230, bearings are $120ish for ACL Race, and rings are $100 for OE or $60ish for identical NPR replacements in ebay or wherever.
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Old 01-06-2011, 05:51 PM   #8
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Oh so I would need to get the gasket kit separate from the piston and rings?
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Old 01-06-2011, 07:19 PM   #9
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Yep.

5
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Old 01-06-2011, 07:54 PM   #10
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Where are you going for your parts? I'm coming from a Volkswagen background and usually went thru a semi-local company with the best price on part (www.germanautoparts.com) I'm going to be doing the headgaskets on a 130k motor that's being swapped into my new 98 LGT
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Old 01-07-2011, 12:11 AM   #11
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Quote:
Originally Posted by BAN SUVS View Post
Yep.

5
Damn

Does anyone have a recommended part distro online? I would like to look in to a light weight flywheel for a first upgrade, find pistons and gasket kit as well.

Help a subi newbie out?
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Old 01-07-2011, 11:18 AM   #12
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www.opposedforces.com for part numbers. www.subarugenuineparts.com to order them.
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Old 01-07-2011, 07:25 PM   #13
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Thx a ton...
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Old 01-08-2011, 07:40 PM   #14
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Quote:
Originally Posted by PaulieKeyboard View Post
Thx a ton...
I've been traveling, half way across the state in one day =(.

Thank you for the links to the online distro's!
I contacted my warranty company about a head gasket leak so that will be going in monday to be looked at. If I can I'm going to have the guy listen to the engine and see if we can get it all fixed under warranty, that would be best I believe.

Thank you guys\gals for all the helpful information I greatly appreciate you helping me become less of a newb and more of a novice!
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