is that so?? i'm just about to order an evo4 sti

From what i understand, there were some issues with the earlier evo3. the evo4 sti's are rockets.

yes that would be correct ,the very early evo 3's had crank problems but that was fixed and has no longer been a problem, i would say you had a worn big end or a bad rear bearing which causes the crank pin to break , this will happen to any brand of motor
evo 3 sti's and evo 4's are one of the best motors youll get straight out of the box, even the evo 3 standard motor in great,
definatly not a common problem

Correction first batch evo 3s had crank problem, all that I know of broke.
This was fixed with more meat and less timing on crank intake, also hardening process was changed. I tested these cranks which were sent from the factory, they had less performance but not one broke that I know of.
Then came the evo 3 STI, coated crank I have seen most of these break at some stage, possibly too brittle. Evo 4s seem to be OK.

Cheers
Alex.K

Sorry both bearing fine, hasnt broken at conrod pin,about 1/3 of the crank has broken off which holds conrod pin. Car was running cool at about 110 c never lean to max on club days.Con rod has no slack at all on pin when i checked it ,and piston and sleeve has plenty of compression left, SHAME REALLY VERY QUICK LITTLE DONK!!!

just got this baby yesterday...no plug came with it , inside was :
- the simple short manual
- the stickers
- manifold gasket
- flywheel cone
- engine
- and the carb.

wonder if nova plugs can be use.?? and this talk about crankshaft pins breakin r giving me the chill's
anyway will start brekin in process in a few days...going to paired it with 2611 pipe set. also i was inform that this baby only need a short brekin in process aroud 3-4 tanks.....is this true? thanks

siro plugs work the best ,no 7 sirio on 16% nitro perfect, and i wouldnt worry about the crank it wont be a problem, and yes it does not come with a plug, and runin is up to you really ,but i would do a couple more than 3/4 tanks

thanks for the info...still waiting for the pipe and plug to arrive to start brekin in

hi... .i will start to break in this motor this saturday , must i add the shim , also do i need to touch the main or bottom needle before i start? thanks

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hi everyone just got a quick question i have just been give an evo 3 .12 motor and i was wonder if there is anyway of knowing which motors had the crank problem,its not an sti crank.thanks

Your safe, only the sti cranks did!!!

I'm afraid that you are incorrect G!
As Kickass stated above, the early evo 3 motors had the cranks breaking across the middle.
This problem was rectified for the next batch of evo3s!
The sti's crank you already know about!

so how do i determine which is the early version of the evo 3 to the later version? crank colour or shape,marking etc thanks