2g head on 6bolt block Oil port mod?

[gsxtreme1987]

I am in the middle of a 6 bolt swap on my 2g. I will be using my 2g head since i got it built few months ago.

My question is, is it absolutely necessary to do the oil port mod on the 2g head?

Or will i be "fine" without it. I am on a 20g turbo right now.

 

[LiquidX]

You are ok to not do it, but it's highly suggest for good reasons.

 

[BogusSVO]

The head bolt holes need to be reamed out from the 12mm 2g size to the 13mm 1g size.

http://www.dsmtuners.com/forums/cylinder-head-short-block/341885-oil-port-mod-2-4g63t.html

I would still reccomend doing Oil port mod 1 at the same time, but that is dependent on how thin the head is.

http://www.dsmtuners.com/forums/newbie-forum/341028-4g63t-head-oil-port-mod.html

http://www.dsmtuners.com/forums/cyl...how-measure-4g63-cylinder-head-thickness.html

By what I have measured the oil trough should be appox .120 deep including the HG thickness

 

[gsxtreme1987]

Oh okay yeah i already the got the bolt holes enlarged. I wish i read up about the oil mods sooner before i picked up the head from the machine shop.

 

[danymuck]

What diameter do I have to hone the new head holes?