barza21
15+ Year Contributor
- 106
- 31
- Oct 11, 2006
-
Fairbanks,
Alaska
Hello,
I bought a '91 TSI AWD three months ago. It came with a motor that had no compression on #3 cylinder. The car came with a lot of goodies and I couldn't let it go for the price. The reason for no compression was a couple of bent valves.
The engine has been taken apart. It's a 6 bolt block . The block has been bored/honed/cleaned. The crank has been mic'd and polished. The block already had the balance shafts removed. The car came with a spare head (one of the goodies). After doing some research I have determined that this spare head is a 1g 7bolt head.
After doing some research on here I have determined that the head bolt stud with the teardrop might need to be opened up. I am able to put a 1/2" drillbit half way through every head bolt hole (It stops half way through). The head bolts can go through all the way. The teardrop hole will receive the oil port mod, but I have read that I should also open up this hole so that the 1/2" drill bit goes all the way through. Is this correct? I can fit a 1/2" drillbit from the gasket side, but it stops when it hits the little ridge inside the oil port. Reaming this bolt hole, is it just reaming past that oil galley hole inside the bolt hole? Here is the link to the mod, but I am just making sure before I proceed with this.
http://www.dsmtuners.com/threads/4g63t-head-oil-port-mod-2.341625/
NOTE: I am not planning on using head studs. Just the stock head bolts. I measured them and bellow the base of the head they measure 11.84mm(.466") and at the middle of the shank 11.08mm (.437"). Do I still have to ream/drill out the oil feed hole?
Thank you for all your help!
I bought a '91 TSI AWD three months ago. It came with a motor that had no compression on #3 cylinder. The car came with a lot of goodies and I couldn't let it go for the price. The reason for no compression was a couple of bent valves.
The engine has been taken apart. It's a 6 bolt block . The block has been bored/honed/cleaned. The crank has been mic'd and polished. The block already had the balance shafts removed. The car came with a spare head (one of the goodies). After doing some research I have determined that this spare head is a 1g 7bolt head.
After doing some research on here I have determined that the head bolt stud with the teardrop might need to be opened up. I am able to put a 1/2" drillbit half way through every head bolt hole (It stops half way through). The head bolts can go through all the way. The teardrop hole will receive the oil port mod, but I have read that I should also open up this hole so that the 1/2" drill bit goes all the way through. Is this correct? I can fit a 1/2" drillbit from the gasket side, but it stops when it hits the little ridge inside the oil port. Reaming this bolt hole, is it just reaming past that oil galley hole inside the bolt hole? Here is the link to the mod, but I am just making sure before I proceed with this.
http://www.dsmtuners.com/threads/4g63t-head-oil-port-mod-2.341625/
NOTE: I am not planning on using head studs. Just the stock head bolts. I measured them and bellow the base of the head they measure 11.84mm(.466") and at the middle of the shank 11.08mm (.437"). Do I still have to ream/drill out the oil feed hole?
Thank you for all your help!
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