WoodsWagon Posted February 9, 2007 Share Posted February 9, 2007 So, i've been inspired to build engine #3 for my loyale. I traded a taurus for a 97 EJ25 with blown headgaskets, and I traded some other stuff for a pair of Ej22 heads. I bought $100 worth of gaskets today, and I will be spending the weekend rigging everything up. The 2.5 is on the stand, and the parts are on the table. The hardest part is going to be drilling the water passages into the headgaskets. I'll be seeing if I can put the 2.5l injectors into the 2.2l manifold. My injectors are what fried the 2.2 in the first place, so I need to swap them anyways. High compression, here I come! Quote Link to comment Share on other sites More sharing options...
baccaruda Posted February 9, 2007 Share Posted February 9, 2007 sounds fair to me! I traded a taurus for a 97 EJ25 with blown headgaskets Quote Link to comment Share on other sites More sharing options...
Numbchux Posted February 9, 2007 Share Posted February 9, 2007 nice, which intake? 2.2l I assume.... should be a sweet combo! Quote Link to comment Share on other sites More sharing options...
970subaru Posted February 9, 2007 Share Posted February 9, 2007 no point in drilling the head gaskets IMHO. and no point in swapping ej22 heads, it would be a downgrade. have the ej25 heads millled if you want to bump the compression, or run thin headgaskets. the 2.2/2.5 combo is mainly good for cars that came as 2.2's or 1.8's. or did you already put a ej22 in the car and thats why you are keeping the 2.2 heads? in that case carry on but you might as well just run the stock ej22 injectors. Quote Link to comment Share on other sites More sharing options...
86BRATMAN Posted February 9, 2007 Share Posted February 9, 2007 i would agree execpt he mentioned his stock injectors were fried, the ej25's should go right in place, as far as i know all subaru mpfi injectors are interchangable Quote Link to comment Share on other sites More sharing options...
970subaru Posted February 9, 2007 Share Posted February 9, 2007 nope there are top feeds and side feeds, I forget wether or not the ej25s are the same. Quote Link to comment Share on other sites More sharing options...
WoodsWagon Posted February 9, 2007 Author Share Posted February 9, 2007 The fuel rails look to be the same design between the 2 engines. The water passages of the 2.2 head and the 2.5 gasket don't line up at all on one side. I want at least some flow through there. The EJ22 heads most probably don't flow as well as the EJ25DOHC's do. I'm not looking for high RPM power though, i'm looking for off-the bottom torque. If the engine stops pulling at 5k rpm's, I won't be really disapointed. What I need is 1k-3k pulling power to keep my 235/75r15's moving in the woods. Quote Link to comment Share on other sites More sharing options...
88HatchMonster Posted February 9, 2007 Share Posted February 9, 2007 The EJ22 heads most probably don't flow as well as the EJ25DOHC's do. I'm not looking for high RPM power though, i'm looking for off-the bottom torque. If the engine stops pulling at 5k rpm's, I won't be really disapointed. What I need is 1k-3k pulling power to keep my 235/75r15's moving in the woods. Can't wait to see how this turns out! I've wanted to try this setup for a long time... Quote Link to comment Share on other sites More sharing options...
WoodsWagon Posted February 10, 2007 Author Share Posted February 10, 2007 Can't wait to see how this turns out! I've wanted to try this setup for a long time... Don't worry, I'll give it a thourough trial by fire. My ej22 lasted 6 months from fresh rebuild to oil burning junk, the EA82 before that turned into a knocking lifeless lump in about a year of road use. It's on it's 3rd rear end, 3rd tranny, 3rd driveshaft, and a bunch of front halfshafts have bit it. If the EJ25 hold's up, it'll be a testament to a good setup. Quote Link to comment Share on other sites More sharing options...
Skip Posted February 10, 2007 Share Posted February 10, 2007 FYI Here is a good read on the procedure. Talks of methods and shows the drilling of the headgasket for the H20 passages. I am also going to be doing this as soon as the weather warms a bit. I want to know why the 2.5 intake manifold will not fit the 2.2L heads. Is it the bolt patern/ port alignment ? both? Is the 2.5L case wider? 2.5 / 2.2 build Quote Link to comment Share on other sites More sharing options...
Storm Posted February 11, 2007 Share Posted February 11, 2007 This is a great low-buck build up. I dunno why the water passages don't line up on the gaskets, but it's a small inconvenience for the boost in performance. The injectors will drop in. You'd know if they were side feed or top feed. Top feed came on the EJ25 in 99 and would need the entire rail plus an adapter for the manifold bungs. Nissan uses some compatable side feed injectors if you wanna look at other options. The DOHC EJ25 manifold won't fit the EJ22 heads because of the bolt pattern. The SOHC EJ25 might have the same pattern but the port spacing from the deck is different, I doubt it'll fit either. SOHC has top feed injectors anyway. Depending on the year of those EJ22 heads, you might need a single port exhaust manifold. If they are dual port, the EJ25 stuff will bolt right on. The setup likes a high flow cat or trackpipe. You can expect to be putting down around 140-145HP to the wheels:headbang: with even more torque. Jay Storm Quote Link to comment Share on other sites More sharing options...
WoodsWagon Posted February 11, 2007 Author Share Posted February 11, 2007 It's all first gen EJ22 stuff going on the block, and it's going in a loyale that's already running an EJ motor. Skip, the link shows exactly the drilling I'm planning on. Good pics. I have a near brand new OEM y pipe and cat for a first gen legacy, still golden colored and shiny. From that back, I'd like to run 2 1/4" pipe, not the 1 3/4" that's on it now. That's restricting the EJ22 already, so it has to go. Quote Link to comment Share on other sites More sharing options...
WoodsWagon Posted February 14, 2007 Author Share Posted February 14, 2007 Took the heads off of the 2.5 last night. Darn, rusted cyl bores. The oil was clean, the plugs were clean, I hoped it would be fine, but now I have to take out the pistons, hone the bores, and put new rings in. Friggin'A. Quote Link to comment Share on other sites More sharing options...
operose Posted February 15, 2007 Share Posted February 15, 2007 sorry, kind of a hijack, but on-topic with regards to torque not sure if it is true or not but I was reading on another board that smaller intake runners will ultimately lead to bad torque? can't find the post now, but the guy's logic was hard to follow. can anyone confirm? Quote Link to comment Share on other sites More sharing options...
970subaru Posted February 15, 2007 Share Posted February 15, 2007 sorry, kind of a hijack, but on-topic with regards to torque not sure if it is true or not but I was reading on another board that smaller intake runners will ultimately lead to bad torque? can't find the post now, but the guy's logic was hard to follow. can anyone confirm? that would be more a function of where the torque is in the powerband. huge runners- up high small runners-down low Quote Link to comment Share on other sites More sharing options...
WoodsWagon Posted February 19, 2007 Author Share Posted February 19, 2007 I want my torque down low, so it should be perfect. The bores are fairly rusted, so I'll hone them and see how much it cleans off. I'll put a piece of cardboard with a cutout for the conn rod in the bottom of the cyl, then flush it out w/ ATF. I've got the two front pistons out, 1 and 2. The rings were stuck in the pistons pretty good. I'm using ultrasonic cleaning to loosen the rings enough to pry them out with a nutpick so I can get the ring expander on them. It's a PITA. So I'll hone it, buy new rings, and hope it all works out well. If not, I'll only have $50 worth of rings in it. Oh, and you have to swap the timing belt tensioner bracket from the 2.2l engine to the 2.5l. The tab of aluminum that holds the middle of the timing belt cover for the drivers side head interferes with the SOHC pully. You could alternatively cut off the tab. Quote Link to comment Share on other sites More sharing options...
WoodsWagon Posted March 27, 2007 Author Share Posted March 27, 2007 OK, so this block turned into a clusterFK. The pitting from corrosion in the bores is so bad that even after honing till the stones wore off didn't take the holes out. So this block goes on the shelf till I have money to buy big pistons and bore it. Piston rings are more like $120. So instead of dumping about 250 bucks in rings and seals into a gauranteed oil burner, I went looking for another block. Which brings me to engine number two, a SOHC EJ25 with a busted ring land. I traded one of my EJ22's for it at school. Only catch is, it's been fully dissasembled, and not torqued when it was put back together. Soooo, full teardown, cleaning, and I'll throw my pistons and new rings on it. Put my waterpump on it. This block has the oil to coolant heat exchanger on it. I like that, but I can't fit it and the oil filter on with my skidplate. So I'll have to swap a block plug from one of my other engines and a thermostat housing. My choice of heads for the EJ25 shortblock: 1992 SOHC EJ22 heads with 1995 roller rockers and cam 1997 DOHC EJ25 heads 199x SOHC EJ25 heads What should I pick? I'd like the EJ22 heads for the low end torque, but the SOHC EJ25 heads look appealing. Quote Link to comment Share on other sites More sharing options...
970subaru Posted March 27, 2007 Share Posted March 27, 2007 sohc ej25 for sure. Quote Link to comment Share on other sites More sharing options...
Numbchux Posted March 27, 2007 Share Posted March 27, 2007 I'd use the 2.2 heads. the higher compression would be great. and with the 2.2 heads and intake, you'll have a simpler time getting the wiring to work. Quote Link to comment Share on other sites More sharing options...
simple monkey Posted March 27, 2007 Share Posted March 27, 2007 i would go with the soch ej25 heads. they flow better, and if you want that bump in compression, you can do it 2 ways: 1. cometic head gasket. 2. mill the heads. Quote Link to comment Share on other sites More sharing options...
970subaru Posted March 27, 2007 Share Posted March 27, 2007 fwiw the ej25 heads and mani can be made to work with ej22e management if need be. Quote Link to comment Share on other sites More sharing options...
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