interests, but better the monied than the religious. Wait a minute we've got a right wing Jesus freak in the oval office....

I am not sure which bank they replace. I didn't even think of gravity and that's been around a long time.

i recall some v-6's had offset connecting rod journals to help drivebality ... and chryselr 1950's V8s had them. There is alos a paper , long story short, that talks of reduced piston friction by use of an offset crankshaft journal on a V oriented piston engine (it has lots of formulas if anyone wants the link)

 

 

 

nipper

I don't remember ever noticeing an offset, but that would make sense. It would be nice to see the piston kit to see just what they have done. I have always been taught to mark pistons and always install the arrow to the front if they have one. This might explain why we were taught that.

The tech papers from Subaru on the EJ engine series - from 1989 - mentions pin offset to "balance" the forces.

 

Maybe they forgot on newer engines??

 

My 2.0 EJ201 slaps, too.

Hello all,

 

 

Well, firstly… Happy Thanks Giving everyone.

 

 

I wanted to say thanks to everyone who helped. You have been more than helpful in my questionings. It’s nice to see people acting civil; I think this can be attributed to the kind of people who drive Subaru product. And for that… I thank you.

 

 

I have decided to bring the vehicle back to the dealership. Opting to the refund, and to wait and find something else. I don’t know if it will be another Subaru product, but this experience hasn’t tainted me to it’s quality and longevity.

 

 

Rino,

http://www.absoluteastronomy.com/encyclopedia/f/fl/flat_engine.htm

 

The benefit of using an horizontally opposed engine engine versus a V engine is that it provides perfect balance because each piston's movement is exactly counterbalanced by the corresponding piston movement of the opposite side.

 

equal and opposite forces cancel out.

 

They cancel out, they are not absorbed. and actually forces are never absorbed in an engine, but are cushioned by the thin layer of oil on the crank journals.

 

nipper

I read same statement somewhere

think about this,if they only replace one side this is going to negate the balance of the engine,the replacement pistons would have to be heavier[because of more skirt] so what would this end up being? ed

Ed, one usually grinds on the piston boss to balance an engine. I imagine they just make sure the weight is within specs. At this point we don't know for sure what they did to make the slap go away.

Cookie do you happen to know which bank Subaru replaces with the improved part? I'm thinking the right side.

I think the left hand side...the drivers side

I just left a message with the local dealer's service advisor. We will see if he calls back with the info.

It is probably a TSB that they don't have. It would be something that cold areas may be doing during the warranty period. No one has had it done at thier dealership. He thinks it would be too expensive as a short block is only $1850 and that is what this dealership reccomends when a car is past the warranty period.

They don't even have instructions on how to change a piston.