The block just came back from machine shop. They bored it for 86mm pistons. When I was about to install the head I found this:



Is this a big problem? I´m thinking about rounding that and just assembly the engine.

Also, the headgasket is a bit smaller than the cylinders. Looks like it´s limits are 85,5mm pistons. Is there a 86mm specific gasket? It´s an OEM Evo 8 gasket.

 

That is normal, it's so the rings don't catch when the pistons are being installed.

 

I think that AWD has posted something about it being a different gasket...

 

it is not normal,if anything it will cause the rings to catch....

op,is every cylinder like that?...

 

The chamfer is ok. What concerns me is the slot that they machined by mistake only on cyl 2. I really have no idea if that´s a problem or not.

 

I searched a lot and only found posts stating that I could use the OEM gasket. But it extends over the cylinders by almost 0,5mm.

 

Just an update. Just checked again and the stock gasket has a 86,1mm bore. It does clear the cylinders.

 

that almost looks like a sleeve. either that or they started to bore it the wrong size and stopped a couple thou down.