Regno
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Everything posted by Regno
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@GeneralDisorder, I have a 10mm oil pump that came off a 1999 or 2000 Subaru GT wagon that appears to be in really nice shape, I got it from a friend that bought it new from subaru and ran it on his car for only a couple thousand miles. Would this be a good upgrade over my current 7mm pump? The one minor issue is that he pulled the back cover off it to check it out or possibly clean it for some reason, I'm not sure. I received it in its disassembled state so I don't really know how to go about or how to begin realigning or clocking the two rotors in relation to each other and possibly the housing. Is there any helpful advice/pictures/ or how to guides that you know of that could help me out in this situation? I can see that each rotor has a small punch mark on each of them and it appears the housing might also. Where do I begin?
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@GeneralDisorder, yeah I totally understand, from the research I have done it seems like rebuilding a proper Subaru engine from the ground up takes a good deal of knowledge, experience and an eye for meticulous detail and perfection. I have heard way to many stories about weekend warriors and self proclaimed backyard mechanics who have taken on the task of a full rebuild with little to no experience only to have the engine completely fail within a very short time span. Just about anyone can completely dismantle a subaru engine into a pile of parts in a matter of hours, its putting the engine back together properly so it not only has longevity but it also doesn't have oil leaking and flowing from every seam, gasket, seal, or orifice like the Mississippi river. Once again, I appreciate the sound advice. On another note, when you do your complete rebuilds do you use 100% genuine OEM Subaru parts? And one more question I have for you, is it beneficial or helpful to upgrade from the stock 7mm oil pump on these cars to something slightly larger or is that just a waste of money? I hear a lot of people talk about upgrading to a 10mm pump even on just a daily driver and not a performance driven build. Thanks again
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@GeneralDisorder, that's all I needed to hear. I appreciate the blunt honesty, I will employ the KISS philosophy from here on out. Like I said before, when it comes to Subaru engines I will admit I am not the most knowledgeable but talking to people on other forums made it seem like rebuilding a Subaru engine was more complicated than putting a man on the moon. Thanks again
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@GeneralDisorder, what would your advice be on this particular piston swap. I have a fairly low mileage 04 EJ259 short block (w/single port exhaust and California emissions) and would like to swap the pistons, heads, intake, and exhaust from an 03 Forester EJ251 that I have. Am I wasting my time trying to swap the used EJ251 pistons into the EJ259 block? Assuming the donor pistons from the EJ251 are the right combination of "A" and "B" size pistons (or does it not really matter) should I reuse the original rings from the EJ259 block or buy brand new rings? Or am I better off with new pistons and rings? This is one of those deals where its a budget build and I don't have a lot of money to work with, I'm basically trying to take the best useable parts from several different EJ's and combine them to make one good motor. Based on your experience am I better off using oem or aftermarket parts (piston/rings) I would love to hear your opinion as your the "man" to ask from what Im told.
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@idosubaru, thanks for the advice. When it comes to this California emissions EJ259 I have been told and heard so many conflicting statements on what I can do or should do its getting frustrating having to try and fact check everything I'm told just to see if there is any validity behind it. I have made similar posts on a few other subaru forums and a lot of people told me that if I use new rings on an old piston without honing the block the rings would never seat properly. I will admit that I'm not as well versed with Subaru engines as I am with GM LS motors, but I have put new rings on used pistons in a non honed cylinder on GM's a half dozen times without any issue of the rings not seating. Once again, I appreciate the advise, with a member status of elite master of the Subaru I tend to believe what your saying is based on knowledge and experience and not on personal opinion like the various other forums I have posted on.
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There is only one concern I have as far as the piston swap goes, I was told by 90% of the people I talked to that if I want use new rings on an old piston that I need to have the cylinders honed or de-glazed. I really didn't want to split the cases, and correct me if I'm wrong but don't you need to gut the block in order to properly hone the cylinders. I have read in a few instances where people removed the pistons and honed the cylinders with the crank still in place but that doesn't seem like the smartest move. Maybe you could get away with it but it doesn't seem like the best option, ( feel free to give me your opinion). I also was told that I would be better off using the old rings from the EJ259 California emissions engine (has about 120,000 miles and is the short block I will be using) and swapping them onto the EJ251 pistons if i dont hone the block because those rings are already seated to the cylinders in which they came from. Does that seem logical?
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I am kinda leaning towards a piston swap like a few people have mentioned, I do have access to another EJ251 that has usable heads although I think a rebuild of them would be in order for reliability and peace of mind. I think the pistons are also in pretty good shape and would also be reusable with a new set of rings. Maybe someone could give me their input on whether reusing a set of good used pistons with new rings would be advisable seeing how I'm trying to keep down the cost wherever possible. I would also have to find out if the pistons from an EJ251 would be a direct swap into the EJ259 block as far as size and clearance goes. Anyone that has maybe done a swap like this or has more knowledge on this subject I would love to hear your advice or input, should I reuse the pistons? what kind of piston rings would best suit this swap? what kind of HG to use (turbo/non-turbo)? what parts would work best, OEM or aftermarket? Please give me your thoughts.
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The biggest difference I have found in the two short blocks is the pistons, the EJ259 block (03-05 2.5 SOHC w/single port and California emissions) has a large dished out section in the piston and the EJ251 block (99-05 2.5 SOHC w/dual ports and federal emissions) has a more traditional and symmetric shape. I have heard from some people that EJ251 heads will work on a EJ259 block and I have also been told that they might not work. Im not sure if there would be issues with valve contact/clearance and compression ratios due to the odd shape of the EJ259 pistons. You can see in the pictures how different the tops of the pistons are.
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I was also under the impression that all the 2.5's SOHC had the dual exhaust cylinder head ports but upon further research I found out just like another member stated that if the engine was from a California car (2003-2005) they used a cylinder head with the single exhaust port to meet stricter California emissions. There isn't a ton of information out there on these engines that I could find that's why I was unsure if the short blocks were the same. I know the intake manifold, cylinder heads, exhaust, and general wiring is all different from my 03 Forester 2.5 SOHC but I was hoping that the short blocks were the same so I could bolt the intake from my forester onto the short block that had the California emissions heads. I have included two pictures, one is an 03-05 2.5 SOHC with California emissions (single port) and the other is a 99-05 2.5 SOHC (dual port) with federal emissions. If someone could tell me for sure whether the short blocks are the same I would really appreciate it.
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Does anyone know if the short block from an 03 Subaru Forester 2.5 SOHC with the dual cylinder exhaust ports uses the same short block as an 04 Subaru Outback 2.5 SOHC with the single cylinder exhaust port? I have the short block that came from the Outback and the cylinder heads that came off the Forester and was hoping I could combine the two to make a complete motor. If anyone could tell me whether they are compatible I would appreciate it.
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I have an 03 Subaru forester x 2.5 SOHC and my cylinder heads and engine are no good. The forester engine that is original to the car did not have EGR. I have acquired a 2.5 long block from an 04 outback and I realize that I have to transfer over my intake assembly and most likely the cam and crank sprockets from my original forester motor. The problem I have is the drivers side cylinder from the outback came with an EGR port on the back of the drivers side cylinder head and the intake I will be using doesn't have the corresponding EGR port. Is it possible to somehow block or plug the EGR port on the outback cylinder seeing how my engine /wiring was never setup for that EGR tube. Any help would be much appreciated, Thanks, Dan
