Trying to identify an ej25 block

Heads, valves, pistons, rods, crankshaft, etc...

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speezly
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Trying to identify an ej25 block

Post by speezly »

So I pulled what looked to be an ej22t out of a 91 ss at a junkyard. Once I got it in my garage and began looking it over, the block is stamped ej25. The heads and turbo look to be for the 22t, but I know there was never a sohc 2.5 turbo model, so how can I tell what type of 2.5 block I have. I am worried someone just tapped the extra lines into a sohc na ej25 and ran a vf11 on it, but I'm at a loss.

Codes on bell housing
72880L
283312269639
it has ej25 stamped as well.

Image
Do the ej22t valve covers say turbo? These don't, but the timing cover does.

ImageImageImage
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Re: Trying to identify an ej25 block

Post by mike-tracy »

Those are proper 22t heads and manifold. As far as which block you have, im not sure if you can identify it with heads on. With the heads off, if it has the cylinder walls supported, its an ej255 or ej257. With completely unsupported cylinders it is one of the many variants of non turbo ej25s.

Hopefully it is a turbo block, and if so, your new engine is a good candidate for dohc heads because the compression ratio wont be crap like with a stock ej22t.
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Josh Colombo wrote: Mon Jan 14, 2002 10:23 am Wait....I'm confused now.
speezly
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Re: Trying to identify an ej25 block

Post by speezly »

Thanks Mike. I plan on running a vf40 with a tmic on the setup as is. I may replace the headgaskets and if I do, I'll take pics of the cylinder walls. I'm curious as to what internals it may have, but I didn't want to have to crack open the block. Even if it is an na ej25 variant, would I be safe running 15-18psi? This came out of a 91 ss in a junkyard in Sebring, Florida. I was looking all over this site to see if it was a members old ride, but no such luck.
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Re: Trying to identify an ej25 block

Post by 86BRATMAN »

Look at the picture below. The ej255/7 cases have reinforcement gussets along the top of each half. These are not there on the na variants.

Image

If those are not present then you can look at the bellhousing, 2 lower studs and 2 upper bolt holes would be a phase 1 block so ej25d. While 2 studs, and 6 bolt holes would be phase 2 indicating ej251/3.

Any of these combinations is high compression, ranging from 9.5-11:1 depending on which block and head gasket combination it is.
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Re: Trying to identify an ej25 block

Post by speezly »

The gussets you are talking about are the zig zag patterns to the left of the ej25 stamp? If so, the block has them. So that means it is a turbo 25 block of some sort? I'll pull the manifold to get a better look, I just really didn't want to take the heads off if I didn't need to.
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Re: Trying to identify an ej25 block

Post by Tommio RS »

Also side note:

Your "EJ" mystery block for some reason has the incorrect AC belt tensioner from what i see?

Its bracket its bolted to is incorrect also.

The later model subi's use the 2 bolt method for the AC tensioner. The 22t uses 3 bolts in a different pattern totally.

ALSO. There are subaru's like brightons and base models of cars THAT do have the same valve covers.
Does that mean its that matching cylinder head....No BUT you never know.

For the intake manifold. looks 22t to me! Does not look like it has a diamond coil pack eather.

As stated before. Hope you have a turbo block sir! Otherwise you might have an issue at hand.

I swapped a 2005 2.5L NA legacy block into a 2004 WRX once.

He got it tuned up all right and she still runs to this day.

All in all.

Your still in good shape regardless of what you all have.
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Re: Trying to identify an ej25 block

Post by speezly »

Would this setup still be non-interference? It may seem like a dumb question, but my only experience with subaru engines has been with the na ej22 in my 93.
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Re: Trying to identify an ej25 block

Post by jamal »

Does it have the 2nd pcv vent like in the picture above? that's on all 2.5 turbo blocks.
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Re: Trying to identify an ej25 block

Post by speezly »

It appears to have both. I still haven't taken the manifold off, but peeking thru with a flashlight, I'm almost positive I see both.
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Re: Trying to identify an ej25 block

Post by cj91legss »

Pop that manifold off. Now I'm curious!!
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Re: Trying to identify an ej25 block

Post by speezly »

Didn't get the time to pull the manifold, and honestly, I'm a little intimidated by the turbo manifold vs the na one I'm used to dealing with. Lots of things to forget the routing on. I did, however use the camera from work to sneak a peak underneath and look for those Pcv vents. I believe this is themImageImage
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Re: Trying to identify an ej25 block

Post by cj91legss »

I understand your concern about the routing but there really isn't much to it honestly. If you forget something there's a sticky in the intake section that explains it. Just remember to use a heat gun when removing hoses. They're old and almost plastic.
91 L-TW Wagon with a full Swap -RIP
92 SS Prefaced, GD dash swapped, 22T/205 Hybrid 20 psi - BEAST!
93 SS Bone Stock Gone!
94 TW Bone Stock Gone!
91 SS 4EAT Sold!
98 LGT 4EAT
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Re: Trying to identify an ej25 block

Post by speezly »

I plan on replacing all of the hoses anyway. I need to relocate the coolant tank to make room for the fxt tmic anyway, so I'll have to disconnect a couple things. Don't worry, I'll be on here asking for help if I get stuck.
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Re: Trying to identify an ej25 block

Post by cj91legss »

That's why we're here! Find yourself a wrx coolant tank and mount it my the strut tower, it'll make fitting the intercooler less of a hassle.
91 L-TW Wagon with a full Swap -RIP
92 SS Prefaced, GD dash swapped, 22T/205 Hybrid 20 psi - BEAST!
93 SS Bone Stock Gone!
94 TW Bone Stock Gone!
91 SS 4EAT Sold!
98 LGT 4EAT
98 LGT Wagon 4EAT
speezly
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Re: Trying to identify an ej25 block

Post by speezly »

I have one of the metal Wrx tanks, but the weld on the cap broke off[emoji17]
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Re: Trying to identify an ej25 block

Post by speezly »

Ok, I finally got around to taking the manifold off. Im pretty those are the two Pcv vent holes and it has the gussets. This looks like a turbo 25 block, no?Image the hoses coming from the valves covers to the tee in the middle of he block were completely hardened and trashed. If I go back with silicone hoses, I should be good, right? Also, are the oil and water pumps the same from an ej25 or should I just order the ej22t ones? Dealerships show that the 10mm Wrx oil pump (aa300) replaces the ej22t part number I found on here. One other question would be concerning the CR. If it is running anywhere from 9.5:1 - 11.1, what else needs to be done to safeguard the engine? I've read about improper engine management blowing up these hybrid motors, although most posts I've found discuss the na hybrids.
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Re: Trying to identify an ej25 block

Post by mike-tracy »

I've found that silicone hoses eventually sweat oil and breaks down. PCV or any oil rated hose is your best bet. A 9.5 to 11 CR is great for an n/a. Without running super low boost and/or a standalone, I'm not sure how that combination will last. I think your best bet is to grab some ej20g or similar DOHC heads to lower the compression, and enjoy both torque and top end power!
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Josh Colombo wrote: Mon Jan 14, 2002 10:23 am Wait....I'm confused now.
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Re: Trying to identify an ej25 block

Post by cj91legss »

I agree with Mike 100%

That definitely is a turbo ej25 block too. Big win for you.
91 L-TW Wagon with a full Swap -RIP
92 SS Prefaced, GD dash swapped, 22T/205 Hybrid 20 psi - BEAST!
93 SS Bone Stock Gone!
94 TW Bone Stock Gone!
91 SS 4EAT Sold!
98 LGT 4EAT
98 LGT Wagon 4EAT
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Re: Trying to identify an ej25 block

Post by 86BRATMAN »

96 ej25d heads will be a good match if this is an ej257 shortblock, if it is an ej255 then the ej20g, etc. Heads with the cloverleaf chamber will be a good match. Unfortunately there isn't a good way to tell except to pull the heads and see which pistons are in there.
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Re: Trying to identify an ej25 block

Post by speezly »

For now, I'm going to run it with the ej22t top end and heads and see what it does. Then, once I have enough to swap to dohc, I'll find out what the internals are. I tried using a stethoscope to look thru the spark plug hole and see the piston, but the lens was a bit too big to fit thru
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