cardo0
Drilling steam holes
Thread Starter
Drifting
Joined: Aug 2000
Posts: 1,805
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From: Annapolis MD
Drilling steam holes
The machine shop I usually use loaned out their jig for dirlling the head steam holes so I can't get them to drill my AFR heads (at least if I want to work on the engine this weekend while Julie is gone and I can evict her car from the garage). Anyone have instructions for drilling them, and could/should I undertake this without a jig setup? Alternatively, anyone know another machine shop near Annapolis MD that can drill them who I can call tomorrow to see if they could fit it in on Thurs or Fri?
Thanks - Greg
Thanks - Greg
Last edited by GregP; Jan 18, 2005 at 03:29 PM.
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
SO they don't hit the water jackets, can't help you as I didn't do mine but the guy that did used the Felpro head gasket as a template and just angled the drill away from the water jackets. 
Burning Brakes
Joined: Jun 2003
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From: Bedford Tx
Originally Posted by MotorHead
SO they don't hit the water jackets, can't help you as I didn't do mine but the guy that did used the Felpro head gasket as a template and just angled the drill away from the water jackets.
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Joined: Feb 1999
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From: Indianapolis IN
from the AFR website
13) 400 BLOCKS:
Steam holes are recommended for all 400 block applications. Use a 400
gasket as a template and drill the three holes nearest the spark plug side of the head straight down, the other three which are very near the head bolt holes should be drilled at a 30 degree angle away from the bolt hole. The center hole will intersect water about 1" down and the two outboard holes to a depth of 2 1/4". Use a 1/8 drill.
13) 400 BLOCKS:
Steam holes are recommended for all 400 block applications. Use a 400
gasket as a template and drill the three holes nearest the spark plug side of the head straight down, the other three which are very near the head bolt holes should be drilled at a 30 degree angle away from the bolt hole. The center hole will intersect water about 1" down and the two outboard holes to a depth of 2 1/4". Use a 1/8 drill.
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Thread Starter
Drifting
Joined: Aug 2000
Posts: 1,805
Likes: 36
From: Annapolis MD
Originally Posted by silver84
Where does the steam go?
-Greg
Thread Starter
Drifting
Joined: Aug 2000
Posts: 1,805
Likes: 36
From: Annapolis MD
Originally Posted by LD85
from the AFR website
13) 400 BLOCKS:
Steam holes are recommended for all 400 block applications. Use a 400
gasket as a template and drill the three holes nearest the spark plug side of the head straight down, the other three which are very near the head bolt holes should be drilled at a 30 degree angle away from the bolt hole. The center hole will intersect water about 1" down and the two outboard holes to a depth of 2 1/4". Use a 1/8 drill.
13) 400 BLOCKS:
Steam holes are recommended for all 400 block applications. Use a 400
gasket as a template and drill the three holes nearest the spark plug side of the head straight down, the other three which are very near the head bolt holes should be drilled at a 30 degree angle away from the bolt hole. The center hole will intersect water about 1" down and the two outboard holes to a depth of 2 1/4". Use a 1/8 drill.
2 1/4" is a long way with a 1/8 drill! I hadn't seen the depth anywhere else, and they didn't send that info with my heads (I didn't look at their website since it isn't mentioned in my catalog either).
Thanks - Greg
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From: The Top of Utah
Originally Posted by MotorHead
SO they don't hit the water jackets, can't help you as I didn't do mine but the guy that did used the Felpro head gasket as a template and just angled the drill away from the water jackets.
RACE ON!!!
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
You know I was just going to leave my post the way it was, I realized as soon as I posted I had it backwards,thanks for catching that, Im keeping an eye out for any mistakes from you
Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by MotorHead
You know I was just going to leave my post the way it was, I realized as soon as I posted I had it backwards,thanks for catching that, Im keeping an eye out for any mistakes from you
Originally Posted by silver84
Originally Posted by MotorHead
SO they don't hit the water jackets, can't help you as I didn't do mine but the guy that did used the Felpro head gasket as a template and just angled the drill away from the water jackets.
Originally Posted by CFI-EFI
Originally Posted by MotorHead
SO they don't hit the water jackets, can't help you as I didn't do mine but the guy that did used the Felpro head gasket as a template and just angled the drill away from the water jackets.
RACE ON!!!
RACE ON!!!
