Who has ported iron heads

Ven302 · 07-17-2007, 10:57 AM

I am working on a set of heads that leak water (externally) it is so slight it never causes trouble, however I really do not like this issue. It does not appear that they can be welded
in the suspect area.

Can anyone elaborate on any coatings or sealers that they use inside the water jackets?

Any thoughts would be appreciated.

Arnold Greene · 07-17-2007, 12:52 PM

The Cadillac dealerships sell a sealer(two pills on a card) for the 4100 series aluminum engine that works very well for porus castings, copper head gaskets, and most all minor casting leaks. I have a friend that used it in a SS big block many years ago, and the head is still being run today without leaking. Hope this helps.

SSDiv6 · 07-17-2007, 03:29 PM

In the past, I have used Seal-All Polymer sealer and Fluid Weld from Goodson succesfully.

http://www.goodson.com/store/templat...l.php?IID=5928

http://www.goodson.com/store/templat...81f3db16807e8e

Jeff Teuton · 07-17-2007, 06:28 PM

K & W Block Seal. We always keep a few cans around. Works real well.

SSDiv6 · 07-18-2007, 10:43 AM

The GM pill and the K&W is only good for a running engine. If the engine is dissassembled, then use the Goodson stuff.

If the engine is in the car, the best fix is Sodium Silicate; also know as Water Glass and Egg Glass. If you use Sodium Silicate, first is drain all the water or coolant, flush radiator and engine with water. Fill radiator with just water and add some about 4 to 8 ounces of sodium silicate to the radiator. Do not use a lot because it can clog the water pump and/or radiator. Let engine run until fully warmed up and then run it for at least 15 to 20 minutes. Let engine cool and drain. Remove all the spark plugs and keep the carburetor or throttle body open so air will circulate and wait 24 hours. Sodium silicate is the only long term cure I have seen.

Another product I have used for engines that are running is Thermagasket. It also works great.
http://www.rxauto.com/

I always put the GM pills in the cooling system for any engine build or rebuild; especially with aluminum cylinder heads. The procedure is used by GM with all the Northstar engines, the LQ1 and Quad-4 engines. Jaguar also recommends the use of the GM pills Bars Leak or K&W for all engine rebuilds.

07-17-2007, 10:57 AM	#1
Ven302 Member Join Date: Feb 2005 Location: Stoney Creek Posts: 261 Likes: 40 Liked 28 Times in 6 Posts	Who has ported iron heads I am working on a set of heads that leak water (externally) it is so slight it never causes trouble, however I really do not like this issue. It does not appear that they can be welded in the suspect area. Can anyone elaborate on any coatings or sealers that they use inside the water jackets? Any thoughts would be appreciated.

07-17-2007, 12:52 PM	#2
Arnold Greene Member Join Date: Mar 2003 Posts: 131 Likes: 0 Liked 3 Times in 2 Posts	Re: Who has ported iron heads The Cadillac dealerships sell a sealer(two pills on a card) for the 4100 series aluminum engine that works very well for porus castings, copper head gaskets, and most all minor casting leaks. I have a friend that used it in a SS big block many years ago, and the head is still being run today without leaking. Hope this helps. __________________ Arnold Greene IHRA/NHRA 2420 A/S, B/S

07-17-2007, 03:29 PM	#3
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 2,989 Likes: 690 Liked 1,453 Times in 541 Posts	Re: Who has ported iron heads In the past, I have used Seal-All Polymer sealer and Fluid Weld from Goodson succesfully. http://www.goodson.com/store/templat...l.php?IID=5928 http://www.goodson.com/store/templat...81f3db16807e8e

07-17-2007, 06:28 PM	#4
Jeff Teuton VIP Member Join Date: Jan 2002 Location: Houma, LA Posts: 2,717 Likes: 2 Liked 326 Times in 50 Posts	Re: Who has ported iron heads K & W Block Seal. We always keep a few cans around. Works real well.

07-18-2007, 10:43 AM	#5
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 2,989 Likes: 690 Liked 1,453 Times in 541 Posts	Re: Who has ported iron heads The GM pill and the K&W is only good for a running engine. If the engine is dissassembled, then use the Goodson stuff. If the engine is in the car, the best fix is Sodium Silicate; also know as Water Glass and Egg Glass. If you use Sodium Silicate, first is drain all the water or coolant, flush radiator and engine with water. Fill radiator with just water and add some about 4 to 8 ounces of sodium silicate to the radiator. Do not use a lot because it can clog the water pump and/or radiator. Let engine run until fully warmed up and then run it for at least 15 to 20 minutes. Let engine cool and drain. Remove all the spark plugs and keep the carburetor or throttle body open so air will circulate and wait 24 hours. Sodium silicate is the only long term cure I have seen. Another product I have used for engines that are running is Thermagasket. It also works great. http://www.rxauto.com/ I always put the GM pills in the cooling system for any engine build or rebuild; especially with aluminum cylinder heads. The procedure is used by GM with all the Northstar engines, the LQ1 and Quad-4 engines. Jaguar also recommends the use of the GM pills Bars Leak or K&W for all engine rebuilds.