Block back from machine shop. Need opinions.

Reply Subscribe

Thread Tools

Search this Thread

Mar 7, 2011, 03:45 PM

LCS

Evolving Member

Thread Starter

iTrader: (9)

Join Date: Jun 2009

Location: Brazil

Posts: 406

Likes: 0

Received 5 Likes on 4 Posts

Block back from machine shop. Need opinions.

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.

Last edited by LCS; Mar 8, 2011 at 09:35 AM. Reason: typos

Reply Like

Mar 9, 2011, 10:12 AM

boostless

Evolved Member

iTrader: (21)

Join Date: Jan 2005

Location: SoCal - Where pimpin aint easy

Posts: 950

Likes: 0

Received 0 Likes on 0 Posts

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

Reply Like

Mar 9, 2011, 10:18 AM

05blue8

Evolved Member

iTrader: (28)

Join Date: Mar 2007

Location: Austin, TX

Posts: 843

Likes: 2

Received 3 Likes on 3 Posts

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

Reply Like

Mar 9, 2011, 10:18 AM

reactionevo8

Evolved Member

iTrader: (18)

Join Date: Jul 2005

Location: olympia

Posts: 546

Likes: 6

Received 4 Likes on 4 Posts

Quote:

Originally Posted by boostless

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

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

op,is every cylinder like that?...

Last edited by reactionevo8; Mar 9, 2011 at 10:21 AM.

Reply Like

Mar 9, 2011, 10:58 AM

LCS

Evolving Member

Thread Starter

iTrader: (9)

Join Date: Jun 2009

Location: Brazil

Posts: 406

Likes: 0

Received 5 Likes on 4 Posts

Quote:

Originally Posted by reactionevo8

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.

Reply Like

Mar 9, 2011, 11:07 AM

LCS

Evolving Member

Thread Starter

iTrader: (9)

Join Date: Jun 2009

Location: Brazil

Posts: 406

Likes: 0

Received 5 Likes on 4 Posts

Quote:

Originally Posted by 05blue8

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

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.

Reply Like

Mar 9, 2011, 01:32 PM

LCS

Evolving Member

Thread Starter

iTrader: (9)

Join Date: Jun 2009

Location: Brazil

Posts: 406

Likes: 0

Received 5 Likes on 4 Posts

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

Reply Like

Block back from machine shop. Need opinions.

Block back from machine shop. Need opinions.

Trending Topics