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BogusSVO
03-22-2010, 03:26 PM
4G63T Head Oil Port Modification

This is a simple and effective mod done to the oil port from block to head.
I have found out a restriction can occur when excessive milling of the head has been done.
Resulting in low/poor oil flow through the cylinder head that can cause lifter tic, cam tower gaulding, and in some cases on turbo engines that feed the turbo oil from a port on the head, to cause the turbo to fail.
Appox mod time with head of engine is 2 mins.

Stock oil port….
http://i261.photobucket.com/albums/ii49/BogusSVO/4G63T%20head/DSCF3922.jpg

Take a die grinder with an aluminum burr and grind and chamfer the oil port, while staying inside the gasket-sealing ring. (I find a ¾ base tree burr works best)
So the end result looks like this.
http://i261.photobucket.com/albums/ii49/BogusSVO/4G63T%20head/DSCF3926-1.jpg
I prefer this to be done before the head is resurfaced.
I hope you find this useful.
Kracka
03-22-2010, 03:31 PM
This is a cool idea and makes perfect sense! Anyone ever seen this done before?
scheides
03-22-2010, 03:34 PM
Is that the only port that oil enters the head from?

Seems like a great idea, anyone else ever tried this?

Wait, isn't that where the headstud goes through? Confused me now.
BogusSVO
03-22-2010, 03:35 PM
no one that I have talked to has... I have it up on Tuners, and CODSM along with a few other fourms.. It seems to be a "new deal"

I have not seen it on a Busher head, nor a few other high dollar DSM heads
BogusSVO
03-22-2010, 03:36 PM
hes that is where the oil flows from block to head, and yeas a head stud dose go thu there...
Constant_Project21
03-22-2010, 03:41 PM
Hmmm, I'll be building a head soon. I'll have to take a couple minutes to do this.
Nightjoker7
03-22-2010, 04:34 PM
I have heard of this being done before. seems like a really good idea
BogusSVO
03-23-2010, 08:12 AM
Nightjoker... where have you heard of this mod before?
Kracka
03-23-2010, 08:18 AM
Nightjoker... where have you heard of this mod before?
Probably one of your posts from another forum :D Scheides and I were reading up on some of the tech info you posted on a Cincinnati forum.
BogusSVO
03-23-2010, 09:24 AM
yeah, I am on a few forum boards... cincy, and DSMtuners too lol