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Old 02-05-2005, 07:40 PM   #1
JUstaszewski
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Default Need Answer By Monday!!! Ej25 Questions!!!

Hi all,
I was hoping somone can give me the low down on this because I need to make a decision on monday as to what short block to buy from the dealer. I have been pouring through the board's the past week looking for a defineate answer on something and have not been totally able to find it, I have a 98rs that blew up. I bought used (dohc) heads that were in good shape but just needed to be milled a hair. What I want to do is buy a new (phase 2) shortblock from a dealer and bolt my heads on it. The dealer (although he is a nice guy) seems to think that it cant be done. He says that the pistons in a phase 2 block are domed instead of dished and it will hit the valves. I was told that someone had actually done this conversion without incident and could confirm that. And If so maybe give me a few pointer about things i'll run into if I do the conversion. (ie-what head gaskets to use, oil&water pumps to use, clutch, flywheel and starter to use) those were all things that people have mentioned to me over the week. I need to know before monday because I am on a strict time table as I am moving at the end of the month and I need to get this car up and running before I move. I just really really hate to buy another phase 1 block after mine went Kaboom at 57k. But I'll have to unless hopefully someone can help.
Thanks All!!

Jason
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Old 02-05-2005, 08:32 PM   #2
import111
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Wow, your engine blew pretty early. Did you have any mods or anything? Any reason why it blew so soon?

Ryan
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Old 02-05-2005, 09:52 PM   #3
JUstaszewski
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Nope, not 1 mod, even a subaru air filter, blew under warranty but dealer refused to warranty it. (and thats another story in itself) They said they didn't know what happened but it wasn't a defect. What they were really doing was trying to double dip. Trying to make me pay for an engine plus labor and also trying to submit it for warranty. Can't prove it, but that's what happened. Took em to small claims, lost. Judge said that the dealer is not the manufactorer and was never liable to fix the car no matter what they told me. (that other story... they did tell me they would fix it at one point) The judge said I could sue soa, but i'd defineatly need a lawyer for that... and they cost to much money/can't afford one.
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Old 02-05-2005, 10:11 PM   #4
snowman4us
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what u need is a ej20G bottom end and ull be ready to ditch the vacume side, and come to the dark side of BOOOST
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Old 02-05-2005, 11:52 PM   #5
Scoobie Steve
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Its very simple... throw those heads in the garbage, I cant imagine what happened to them to warrant a milling.....and its bad practice to mill suby heads anyway. Buy a phase I 2.5l long block, swap over your old engine goodies. Keep oil and water in it and it will last 200k miles.
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Old 02-06-2005, 04:02 PM   #6
Storm
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Heads can get a burnishing around the combustion chambers from the fire rings on the headsgaskets.....that's normal Scoobie Steve..... May not require milling as much as a simple hand lapping on a flatstone.

The heads that are on the blown motor....what is their condition and milage? Better than the spare heads you bought? If so, use those with a phase 2 block and a standard phase 2 headgasket (.043") You'll be at a CR of more than 10:1 but less than if you use a thinner Cometic gasket (.027") that will yeild 11.4:1 CR and require premium fuel.

The valves will only hit the pistons if the timing is lost.....just as a stock motor would.

There is no special secret to running a phase 2 block with DOHC heads. It's being done by many folks with no problems.

I'm personally running phase 2 block, milled&worked DOHC heads, EJ20G intake manifold off of an EJ18 ECU with just an AFC to correct fuel. No problems other than the cost of 94 octane and toluene for my particular setup.....

You will not have any problems bolting the stuff up and running it. Just run premium gas to keep the knock sensor happy.


Jay Storm
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Old 02-06-2005, 04:16 PM   #7
jamesfacts
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Jay, how much toluene do you need to use?
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Old 02-06-2005, 04:44 PM   #8
scoobyimpreza
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or you can buy my ej257 block =x
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Old 02-06-2005, 10:36 PM   #9
Storm
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Quote:
Originally Posted by americanyouth
Jay, how much toluene do you need to use?
Depends on the octane I get stuck with. I'll throw in a gallon w/12 gal of 91 and none with a tank of 93 or higher. Ask Matt Monson what he's doing since his heads haven't been milled at all. I think I remember him running 91 with no problems.

Don't sweat this buildup....it's stupid simple!


Jay Storm
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