Any problem plugging oil feed hole in head?

[Anlushac11]

Since the shortblock is done and assembled the machinist does not want to tap and thread the block as he is afraid of shavings getting into the oil passages and causing problems.

He wants to tal and thread the head to block hole.

This is so I can use SB Ford lifters and Buick V6 pushrods for oiling of rocker arms and shaft. Shaft will be dry film lubriant coated also to reduce friction and danger of galling.

I am/will be running the .080" solid copper head gasket.

 

[falcon1963]

Since the shortblock is done and assembled the machinist does not want to tap and thread the block as he is afraid of shavings getting into the oil passages and causing problems.

He wants to tal and thread the head to block hole.

This is so I can use SB Ford lifters and Buick V6 pushrods for oiling of rocker arms and shaft. Shaft will be dry film lubriant coated also to reduce friction and danger of galling.

I am/will be running the .080" solid copper head gasket.

Very simple fix......
Tap the block and install a plug in the passage. Works great! I've done it on two of Kelly's blocks and we've never had a leak.

I can take a pic of two and send them to ya if needed. It's real easy to do. However you do need to be careful about the metal shavings that comes from the tapping.
If the motor is on a stand and you already have the cam/crankshaft installed, then flip the motor over so gravity will keep the shavings from falling into the bearings. Use some grease o the tap to help retain them also. Inspect the hole and the cam bearing for any shavings. Clean out as necessary.
If the motor is still in the car, then fill the hole with a bunch of grease. Tap the hole, then suck out the grease/shavings with a shop vacuum.

 

[bubba22349]

I don't see that it would hurt as long as it gets some oil to rockers

 

[falcon1963]

Since the shortblock is done and assembled the machinist does not want to tap and thread the block as he is afraid of shavings getting into the oil passages and causing problems.

He wants to tal and thread the head to block hole.

This is so I can use SB Ford lifters and Buick V6 pushrods for oiling of rocker arms and shaft. Shaft will be dry film lubriant coated also to reduce friction and danger of galling.

I am/will be running the .080" solid copper head gasket.

If you are still using a rocker arm shaft i retract my previous statement. If you still want to use oil thru pushrods that will only lube the rocker arm adjuster, unless the adjuster is drilled thru to shoot oil through it, you will still have to supply some oil to the shaft via the oil galley. Yella terra rocker arms just need oil from the pushrod thru the drilled adjuster.

You could limit the oil to the head if you still plan to use a rocker arm shaft by drilling a plug in the block or the head with a oil hole .045?? to the shaft, the rest would come from the pushrod.


The best deal if you still use a rocker arm shaft is leave the stock rocker arm shaft oiling system stock.

If thats the case you do not need oil thru pushrods.
I

 

[rbohm]

8) mark, one bit of advice if you really want to eliminate the oil pressure opening in the block ot the head, swap the rocker arm bushings out for needle bearings so that the oil splash will be enough to lubricate the rocker arm bearings. i would also tap the block rather than the head to prevent an oi leak at that point.