Are all EJ25 short blocks the same?

Are all EJ25 short blocks the same?

As for just the shortblock portion of the engine, the pistons are slightly different. Not to say which is better or worse, just a little different. For the work you are planning to do, I would not worry about whether the block came from a EJ255 or EJ257 as the block itself is the same.

Is EJ25 the same as EJ255?

In the US, the only car that has an engine designated as an EJ257 is the STI. All of the other 2.5 liter turbo EJ series engines are designated EJ255. For those production years, the engines were the same from the case, rods, and pistons, up to the B25 heads and cams.

Are all EJ25 heads the same?

A. Any of the 2.5L EJs will fit your heads. Q. Which 2.5l EJ shortblock(crank, rods, pistons) will work with your heads?

What is Subaru short block?

Get a Genuine Remanufactured Subaru Short Block in Olympia, WA. These short blocks typically consist of the main engine block, crankshaft, and pistons that have been expertly inspected and tested. Parts that can wear down are replaced with new components so the end result is essentially a new engine block.

Is EJ25 semi closed deck?

The factory Subaru EJ25 case is referred to as a semi-open (or semi-closed) deck. The block is essentially an open deck with 3 narrow supports tying in the main case to the tops of the sleeves. This feature was a slight improvement over the EJ20 case, which was a completely open deck with no support.

Is the EJ25 the same as the EJ257?

The EJ255 has a different domed piston vs the EJ257. Subaru of America designates the same part numbers for an EJ255 shortblock, and EJ257 shortblock with the exception of the pistons.

What car has EJ25?

The EJ Subaru Engine is well renowned for its distinctive rumble sound, its tuning potential and dominance in motorsports. Subaru’s flagship model the WRX and STI have all been powered by this engine series until 2015 when the WRX name dropped the EJ25 and added a BRZ variant of Subaru’s new motor the FA series.

Is the EJ25 reliable?

As is the case with most performance engines, the Subaru EJ25 is nowhere near perfect and has its fair share of issues. With all of its imperfections studied and properly sorted out however, the EJ25 can prove to be a reliable engine to enjoy performance driving with.

How long do EJ25 engines last?

They can last forever if you take care of them, even if you abuse it, expect it to go past what you’d expect. At 100k+ once the head gaskets (timing belt etc.) have been replaced and that mess has been fixed, the thing is basically good for another 100-200k.

Is EJ25 open deck?

Semi-Closed Deck These are found in most EJ20 and EJ25 Turbo vehicles. Semi-Closed deck blocks offer reasonable strength and an open coolant passage to the cylinder head for optimal cooling.

What EJ motors are closed deck?

True closed decks are some EJ20Gs (about 10%), the EJ22T (100%) and the EJ22 from the 22B. Except for the 22B, all the closed decks have oil squirters, are phase 1 and #3 thrust.

What is the difference between the EJ20 and EJ25?

The difference is evident between the EJ20 and EJ25 since the latter has a bigger cylinder bore from 92 mm to 99.5 mm, a longer piston stroke from 75 mm to 79 mm, and a lower compression height from 30.7 to 32. 7 mm. Connecting rods length stands the same at 130.5 mm as well as the cylinder block deck height.

What is the difference between EJ255 and STI heads?

All EJ255 blocks have different heads than that of the STi. There are other differences as well to include the pistons. As of right now I’m not going to go into that and I’m just going to cover the heads. The EJ255’s heads smaller combustion chamber ports and smaller intake ports to my knowledge.

What kind of engine does a Subaru EJ251 have?

Subaru developed a long list of SOHC-designed engines for the United States market, and the first version to come out from that franchise is the EJ251. This engine produces 165 HP at 5,600 RPM and 167 lb-ft of torque at 4,400 RPM.

Is the LGT EJ255 shortblock the same as the STI?

If you can get past all the BS you’ll see that sponaugle post in this thread as well with a bit of info of his own. He confirms that the LGT EJ255 for 05/06 are identical to that of the STi for the same year. Keep this in mind swappers if you want an STi shortblock with possibly a smaller price tag.