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ALUMINUM HEAD POROSITY #1054819 08/17/11 03:12 PM 08/17/11 03:12 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy OP master
maximum entropy OP master M Joined: Feb 2007 Posts: 5,080 organ	a racing buddy of mine has a set of bulldog heads on his duster that have had issues with porosity. specifically, one of the exhaust ports is seeping coolant. he's had it welded, and it's seeping again, in the bowl area. his welder said it's not repairable this time. do any of you guys have any experience with this problem? any "miracle cures"? for what is the good life if not doing things thoughtfully?

Re: ALUMINUM HEAD POROSITY [Re: maximum entropy] #1054820 08/17/11 03:19 PM 08/17/11 03:19 PM
Joined: Jul 2008 Posts: 30,451 Florida STAYcation dOoC The village idiot's idiot
dOoC The village idiot's idiot Joined: Jul 2008 Posts: 30,451 Florida STAYcation	There is a 3 step stop-leak process that I helped a friend with some years back. It stopped a head-gasket leak ...so it should "cure" a little porosity.

Re: ALUMINUM HEAD POROSITY [Re: maximum entropy] #1054821 08/17/11 06:19 PM 08/17/11 06:19 PM
Joined: Feb 2009 Posts: 1,019 Finland mafo super stock
mafo super stock Joined: Feb 2009 Posts: 1,019 Finland	Goodson sell a very good product called SEAL ALL block and head sealer, works for me -65 Valiant,420", all motor,2700#, dot tires, 8,42 @ 160,2

Re: ALUMINUM HEAD POROSITY [Re: dOoC] #1054822 08/17/11 06:56 PM 08/17/11 06:56 PM
Joined: Oct 2005 Posts: 8,880 Ontario, Canada S Stanton Don't question me!
Stanton Don't question me! S Joined: Oct 2005 Posts: 8,880 Ontario, Canada	Quote: There is a 3 step stop-leak process that I helped a friend with some years back. It stopped a head-gasket leak ...so it should "cure" a little porosity. But its a secret so he's not going to tell us what it is !!!

Re: ALUMINUM HEAD POROSITY [Re: Stanton] #1054823 08/17/11 07:02 PM 08/17/11 07:02 PM
Joined: Jul 2008 Posts: 30,451 Florida STAYcation dOoC The village idiot's idiot
dOoC The village idiot's idiot Joined: Jul 2008 Posts: 30,451 Florida STAYcation	Quote: Quote: There is a 3 step stop-leak process that I helped a friend with some years back. It stopped a head-gasket leak ...so it should "cure" a little porosity. But its a secret so he's not going to tell us what it is !!! Hey WISE GUY ...if I could have remembered the brand I would have mentioned it. .... ... I think he got it at NAPA ...

Re: ALUMINUM HEAD POROSITY [Re: Stanton] #1054824 08/17/11 07:18 PM 08/17/11 07:18 PM
Joined: Dec 2009 Posts: 1,074 detroit, mi POS Dakota super stock
POS Dakota super stock Joined: Dec 2009 Posts: 1,074 detroit, mi	I saw a thread on this subject on speedtalk forum a while bck and there was some good useful info on this very subject. Might be worth checking it out. I remember several concotions being mentioned. One thaat's poured into the head then I think baked. Forgot what it was called though... One of the brands was called "kreme" I think.

Re: ALUMINUM HEAD POROSITY [Re: dOoC] #1054825 08/17/11 07:22 PM 08/17/11 07:22 PM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	Sometimes it is to thin in the area to weld,we usually lightly peen the area with a round head punch and rub some high temp Lab Metal or similar into the porosity holes.Them we put a sealer in the cooling system,usually Dyke or other sealer. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: ALUMINUM HEAD POROSITY [Re: maximum entropy] #1054826 08/17/11 08:11 PM 08/17/11 08:11 PM
Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY HEMIFRED master
HEMIFRED master Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY	We had a B/B that leaked coolant into the oil from what was thought to come from the head. it was found that it leaked only the engine got hot and pressure in the radiator rose to 14lb. No way would it stop everything was tried with no luck until the coolant was replaced with EVANS which does not boil until 370 degrees. so it never got that hot and only a zero lb cap on the radiator. last chance repair is still working home of the Sox and Martin Hemi Duster

Re: ALUMINUM HEAD POROSITY [Re: POS Dakota] #1054827 08/17/11 09:32 PM 08/17/11 09:32 PM
Joined: Feb 2005 Posts: 20,185 PA. pittsburghracer "Little"John
pittsburghracer "Little"John Joined: Feb 2005 Posts: 20,185 PA.	Quote: I saw a thread on this subject on speedtalk forum a while bck and there was some good useful info on this very subject. Might be worth checking it out. I remember several concotions being mentioned. One thaat's poured into the head then I think baked. Forgot what it was called though... One of the brands was called "kreme" I think. That was a very good post by head porter Darrin Morgan. When I read this post I went to Speedtalk to try and find it but didn't have any luck locating it. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: ALUMINUM HEAD POROSITY [Re: pittsburghracer] #1054828 08/17/11 10:53 PM 08/17/11 10:53 PM
Joined: May 2003 Posts: 6,566 Downtown Roebuck Ont Twostick Still wishing...
Twostick Still wishing... Joined: May 2003 Posts: 6,566 Downtown Roebuck Ont	Try some Waterglass http://en.wikipedia.org/wiki/Sodium_silicate Old school cure that is cheap and effective. Kevin

Re: ALUMINUM HEAD POROSITY [Re: pittsburghracer] #1054829 08/17/11 10:59 PM 08/17/11 10:59 PM
Joined: Mar 2006 Posts: 1,402 State of Corruption camdog440 pro stock
camdog440 pro stock Joined: Mar 2006 Posts: 1,402 State of Corruption	Maybe this is it... I finally found it! Last edited by camdog440; 08/17/11 11:01 PM.

Re: ALUMINUM HEAD POROSITY [Re: camdog440] #1054830 08/17/11 11:18 PM 08/17/11 11:18 PM
Joined: Feb 2005 Posts: 20,185 PA. pittsburghracer "Little"John
pittsburghracer "Little"John Joined: Feb 2005 Posts: 20,185 PA.	Quote: Maybe this is it... I finally found it! Good job. I must be getting blind in my old age. I looking for that post for about 30 minutes earlier today and couldn't find it. I saved it in my favorites for future reference. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: ALUMINUM HEAD POROSITY [Re: camdog440] #1054831 08/18/11 12:47 AM 08/18/11 12:47 AM
Joined: Dec 2009 Posts: 1,074 detroit, mi POS Dakota super stock
POS Dakota super stock Joined: Dec 2009 Posts: 1,074 detroit, mi	Quote: Maybe this is it... I finally found it!

Re: ALUMINUM HEAD POROSITY [Re: POS Dakota] #1054832 08/18/11 06:05 AM 08/18/11 06:05 AM
Joined: May 2003 Posts: 6,566 Downtown Roebuck Ont Twostick Still wishing...
Twostick Still wishing... Joined: May 2003 Posts: 6,566 Downtown Roebuck Ont	Quote: Quote: Maybe this is it... I finally found it! There is a Smokey Yunick reference to sodium silicate (waterglass) in that forum. IMHO this is the only fix that will last because it will not be affected by engine heat after. Kevin

Re: ALUMINUM HEAD POROSITY [Re: maximum entropy] #1054833 08/18/11 11:02 AM 08/18/11 11:02 AM
Joined: Mar 2007 Posts: 572 Shelbyville, TN USA 4 40ford mopar addict
40ford mopar addict 4 Joined: Mar 2007 Posts: 572 Shelbyville, TN USA	We have dealt with cylinder head (and block) porosity for years---starting with W2s that had been ported too far. And W5s, early Arringtons, W7s, and even the aluminum sprint blocks. We found the best repair was to carry the problem part(s) to a full line cylinder head repair shop. There, they use a waterglass solution, under pressure, heated to stop the leak. Sometimes, the treatment only takes one hour, sometimes the treatment requires eight hours---but it has always gotten repaired. You probably will need to make your own block off plates for any heads(18 or 20 heads). And, you get the advantage of better heat retention in aluminum heads=====better horsepower.

Re: ALUMINUM HEAD POROSITY [Re: 40ford] #1054834 08/18/11 12:40 PM 08/18/11 12:40 PM
Joined: Dec 2009 Posts: 1,074 detroit, mi POS Dakota super stock
POS Dakota super stock Joined: Dec 2009 Posts: 1,074 detroit, mi	Quote: We have dealt with cylinder head (and block) porosity for years---starting with W2s that had been ported too far. And W5s, early Arringtons, W7s, and even the aluminum sprint blocks. We found the best repair was to carry the problem part(s) to a full line cylinder head repair shop. There, they use a waterglass solution, under pressure, heated to stop the leak. Sometimes, the treatment only takes one hour, sometimes the treatment requires eight hours---but it has always gotten repaired. You probably will need to make your own block off plates for any heads(18 or 20 heads). And, you get the advantage of better heat retention in aluminum heads=====better horsepower. Good point regarding the better heat retention. I never thought of that.

Re: ALUMINUM HEAD POROSITY [Re: POS Dakota] #1054835 08/18/11 07:33 PM 08/18/11 07:33 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy OP master
maximum entropy OP master M Joined: Feb 2007 Posts: 5,080 organ	a lot of good info here. thanks all! for what is the good life if not doing things thoughtfully?

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