While inspecting the bottom end of my engine which has the heads off due to pressurising of the coolant system i have discovered hairline cracks in two of the cylinders, one crack in each cylinder, not very big, but never the less something that has to be fixed while its apart, anyone had this happen before? The engine is running over 400bhp, runs cool enough with respect to both oil and water, and det is also ok.

Looks like thicker liners may be an option to prevent this happening again, anyone done this?

pics to follow.

opinions............

 

They tend to do that I'm afraid. I am currently having an ej257 re-linered as a precaution as I have had one crack before

 

are you replacing them with standard ones or thicker? and if you don`t mind me asking how much are you getting charged for the work on just the liners?

cheers,

robert

 

Thicker and better metal! To be honest I don't know exactly what the cost is, iirc the last time I had it done it was around £150 per bore

 

tried to take pics with the camera, but was unsuccessful. anyway, they are approx 15mm long.

I hope to go the route of thicker liners if anyone can give me anymore advice

robert.

 

Rather shocked at this, but nothing is unbreakable i spose.

At least when the liners are in, you have no further worries, although i'd uprate your rods while your in there and say hello to the high side of 7k revs.

 

Have you got any pics? something must be wrong to crack a liner at around 400hp!

 

attempted to take pics but my photography skills were not up to the job, just got blurry photo`s

drb5 - thats the idea, do it so it won`t happen again! onwards and upwards.

have been looking for ideas on the axis site, looks like the sort of work i need done to my block

 

Thats what I would have said, When you say over 400 do you mean 495bhp - 495lbs. I thought that high 4 hundreds would be ok for the liners, Or a fair bit over 400 anyway.

 

Has never been on a rr, somewhere between 400-450bhp and torque to match.

 

One of the reasons I went with the EJ22t block and went 2.35... if you want reliable 400bhp +, EJ22t block is the only way...

 

if i had built the car from scratch that is the way i would have went, but i bought the car with this engine, 400+ can be acheived reliably on 2.5`s as well.

 

400hp isn't a problem on a 2.5. I'm wondering why it's happened, but it'll prolly be one of those things we never find out.

Any reputable tuner will sort you out with sleeves and machine work.

Dunno where your based, or how close to certain places. Zen, Scoobyclinic etc?

 

or a cdb ej20 of course as well !!!

 

Based in Northern Ireland, what about the sleeves axis use in their engines? any suppliers for them here?

 

You'd be better sourcing a sleeved block...I wouldnt trust anyone in Northern Ireland to re-sleeve one.

Although it is extremely odd for one to crack IMO. Was it detonating or something ? Detonation can cause liner problems on some other engines which run extremely thin liners, but a EJ25 should be fine, as they have been well tested....4-450 shouldnt be a problem if its been put together properly and tuned properly.

Was it using std rods and pistons ? Are there any other problems with the bottom end, or just the liners ?

 

Wisco pistons and standard rods, no other problems with the bottom end.

very unusual, but who knows how long they have been like that.

 

Do you know any history on the short motor ? Or did you buy the car like this ?

 

bought as is.

 

Don't need a cdb for over 400hp. All standard Subaru turbo blocks are good for over 400hp.

 

Robert,

We can resleeve your block for you with our own top hat liners. We routinely do this to our cases which are destined for 500hp+

However, as has been mentioned, 4-500 shouldn't really be a problem on a well set up motor in the short term.

 

How much do you charge for this ?
you can pm if you prefer

 

Although on the current spec thicker top hat liners are a bit of overkill, it would leave me the option for more power in the future

 

I'd be fitting better rods, before worrying about thicker liners for any future build !!!

 

Care to post prices of installing the to phat liners in the EJ257 Mike?

Does this inc boring to a piston spec?

PM if you prefer.

 

Naturally that will be happening as well

 

Hi Frayz.


Wherever we install liners or new pistons, we always bore to piston for tolerances relevant to the application that the engine is likely to be used for.



Mike.

 

Rite, after lengthy discussions, i`m going to go with a new crankcase, these blocks should be able to withsatnd what i`m asking them to do, so i`m going to give it another go,

suppliers and prices please