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Old 02-11-2014, 09:21 AM   #1
WRX-ERROR
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Default EJ255 Sleeved Closed Deck Question

I picked up a EJ255 sleeved closed deck black from a friend who picked it up from a shop who had planned on using it for their rally car. BUT other than that I don't know much about the block. It looks like it's been honed and cross hatch and the bore measured at 99.94 (average of all 4).

My question is with the sleeves. The outside of the sleeves have a small lip on them about a finger nail thick. It seems intentional at the sleeves line up with the deck perfectly but for the life of me I can't figure out why. Anyone have a clue or should I just have it decked?



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Old 02-11-2014, 09:51 AM   #2
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Are you sure there are sleeves in there? Doesn't look it to me, I think I see a little section of aluminum at the top of the bore, which means it still has the oe liner in it. I think the deck has just been welded up and they machined an o-ring right in the deck. Do a little scratch test near the o-ring.
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Old 02-11-2014, 10:05 AM   #3
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Originally Posted by Barney145 View Post
Are you sure there are sleeves in there? Doesn't look it to me, I think I see a little section of aluminum at the top of the bore, which means it still has the oe liner in it. I think the deck has just been welded up and they machined an o-ring right in the deck. Do a little scratch test near the o-ring.
As I said I don't know much about the block other than what I was told. The sleeves/liner looked a little thinner than most sleeves I have seen but looking at the block they don't look OEM to me.

Any sure fire way to tell if it's sleeved or just an OEM block filled in to close the deck?
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Old 02-11-2014, 10:25 AM   #4
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There are no sleeves in there. Above and beyond that, that is a really bad way to try and close deck a block. Welding that much aluminum has bound to distort the hell out of that block.
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Old 02-11-2014, 10:35 AM   #5
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Originally Posted by Crystal_Imprezav View Post
There are no sleeves in there. Above and beyond that, that is a really bad way to try and close deck a block. Welding that much aluminum has bound to distort the hell out of that block.
I've seen a few blocks closed like this.

Ok so onto my original question about the lip. Here is a better photo. I'm guessing I should just have the block decked.

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Old 02-11-2014, 10:38 AM   #6
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the lip is for o-rings.

I'd be very iffy about a block that's been welded like that.
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Old 02-11-2014, 10:59 AM   #7
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the lip is for o-rings.

I'd be very iffy about a block that's been welded like that.
I got the block, STi rods, STi crank and STi pistons (not using) for $250.00. The plan was to put forged pistons in it and use it to replace my EJ205. Looking in the range of 400whp. Total I see having maybe a grand or so into it. I think if it goes boom I'm OK with the amount of money I have into it.

Given that info do you still think it's a bad idea?
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Old 02-11-2014, 11:07 AM   #8
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Take it to a machine shop so they can measure the bores with a bore gauge. Check the bores to make sure they are still round and don't taper. Also have them check the main journals to make sure they are still round. Chances are something is going to be really out of shape with all that filler material welded into the block.

The grooves are for o-rings as everyone else has said like below. Should just be some copper or stainless 14ga .040 wire. If you don't know how to install it have a machine shop do it. Your going to have to deck the block a lot for you to remove the o-ring lip.

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Old 02-11-2014, 11:52 AM   #9
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Quote:
Originally Posted by Crystal_Imprezav View Post
Take it to a machine shop so they can measure the bores with a bore gauge. Check the bores to make sure they are still round and don't taper. Also have them check the main journals to make sure they are still round. Chances are something is going to be really out of shape with all that filler material welded into the block.

The grooves are for o-rings as everyone else has said like below. Should just be some copper or stainless 14ga .040 wire. If you don't know how to install it have a machine shop do it. Your going to have to deck the block a lot for you to remove the o-ring lip.
Ok thanks for the info. I was hoping the block was good to go but I guess it's better safe then sorry.
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