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Discussion Starter #1 (Edited)
I guess I need to find the N key as in INTAKE before posting. I have a NEW pair of iron Grumpy heads that have been heavily ported, they flow 400/389. They are brand new heads and have never had seats or guides done when I bought them. I'm sure they have been around for ten years. There are tubes installed in the head bolt locations into two ports on each head. The porting has gone into the pushrod Holes on two ports on each head. these are not the round pushrod holes, they arent going to be able to be tubed. My question is what kind of epoxy can be used and does anyone have much experience or advise on epoxy work in intake ports?? Thanks in advance.
 

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I have a NEW pair of iron Grumpy heads that have been heavily ported, they flow 400/389. They are brand new heads and have never had seats or guides done when I bought them. There are tubes installed in the head bolt locations into two ports on each head. The porting has gone into the pushrod Holes on two ports on each head. these are not the round pushrod holes, they arent going to be able to be tubed. My question is what kind of epoxy can be used and does anyone have much experience or advise on epoxy work in intake ports?? Thanks in advance.
Why couldn't you mill the PR holes round and tube them?

I would think you would use an epoxy with a metal base for simlar expansion and contraction, you can get epoxies with a high iron content which should minimize cracking and detatchment.

Contact these guys....
Gromm Racing Heads


(408) 287-1301
664 Stockton Ave Ste J
San Jose, CA 95126

You will not be disapointed.....:)devil




GT :)hand
 

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Discussion Starter #4
holes

Why couldn't you mill the PR holes round and tube them?

I would think you would use an epoxy with a metal base for simlar expansion and contraction, you can get epoxies with a high iron content which should minimize cracking and detatchment.

Contact these guys....
Gromm Racing Heads


(408) 287-1301
664 Stockton Ave Ste J
San Jose, CA 95126

You will not be disapointed.....:)devil




GT :)hand
The pushrod holes are cast and are the irregular big holes so there is nothing to drill or support a tube. Thanks, I'll keep that number. I've only got $600 into these heads without the valves so I think it is worth making the right.
 

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Thats going to be a very hard repair to get to last, even the best epoxy on cast iron will over time is going to crack. small little cracks you can usually get away with but the big holes..another story.
Im going to guess thats why seats and guides were never installed, just to risky a repair.
If you try epoxy I would first cover the hole with a stainless mesh(you can also use the aluminum mesh used in drywall repair). The type for air filters and then "sandwich" it from each side with the epoxy use a bunch and let the whole mess cure and then final grind.(manley or jb weld works) Then coat with a gas resistant epoxy paint. It should hold.(maybe)
 

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First thing I wonder about is how they got flow numbers with no seats/guides, since you need a valve job and a valve to flow a head.

QuickCP is on the right track...for that kind of repair in a cast iron intake port, I'd find a heavy equipment mechanic and see if nyou can get some of his Caterpillar block repair epoxy and use the mesh as suggested. That by far is the best iron repair material on the planet. You might be able to find out what it is and get it by brand name, but whatever it is, it works, and will outlast the heads.
 

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Discussion Starter #7
First thing I wonder about is how they got flow numbers with no seats/guides, since you need a valve job and a valve to flow a head.

QuickCP is on the right track...for that kind of repair in a cast iron intake port, I'd find a heavy equipment mechanic and see if nyou can get some of his Caterpillar block repair epoxy and use the mesh as suggested. That by far is the best iron repair material on the planet. You might be able to find out what it is and get it by brand name, but whatever it is, it works, and will outlast the heads.
I had the valve job and guides done BEFORE they were flowed. I bought two ferea valves for the flow test. the port work is beautiful especially the chambers. Thanks to you and cp for the suggestions.
 

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I just used a liquid metal 2 part material to make a repair on a chiller barrel two weeks ago. It is designed to hold pressure and be machined. One of the chiller manufacturers like Trane spec'ed it out. It's HEX-5 Belzona or Belzona 1221 Super E-metal. We purchased it from an outfit called Norcal Molecular LLC. I think they were in Oakland Ca. The number is 925-798-5200, Cyndee Koskey, or Bob Sundberg. F1~
 

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I just used a liquid metal 2 part material to make a repair on a chiller barrel two weeks ago. It is designed to hold pressure and be machined. One of the chiller manufacturers like Trane spec'ed it out. It's HEX-5 Belzona or Belzona 1221 Super E-metal. We purchased it from an outfit called Norcal Molecular LLC. I think they were in Oakland Ca. The number is 925-798-5200, Cyndee Koskey, or Bob Sundberg. F1~
Belzona is the bomb, pricey though....what kind of chiller Trane CVHE?

What area do you work in? Always looking for a chiller nerd...:)sphss

I have repaired the liquid line flange and suction piece on two different chillers with the stuff, I may have some left over, gotta check (the stuff costs hundreds of dollars for a small quantity)....

GT :)hand
 

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Discussion Starter #10
Belzona is the bomb, pricey though....what kind of chiller Trane CVHE?

What area do you work in? Always looking for a chiller nerd...:)sphss

I have repaired the liquid line flange and suction piece on two different chillers with the stuff, I may have some left over, gotta check (the stuff costs hundreds of dollars for a small quantity)....

GT :)hand
that is the stuff a local machinest told me about. All he knew was bal.....something.
 

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Belzona is the bomb, pricey though....what kind of chiller Trane CVHE?

What area do you work in? Always looking for a chiller nerd...:)sphss


GT :)hand
It was a really old Trane at HP Palo Alto. I don't qualify as a chiller nerd, I'm a pipefitter for Local #393 in San Jose. I've installed a few over the years, but when I'm done a start up tech comes in behind us to commision them.

The chiller had a rust through spot on the bottom, I ground it all clean and applied the Belzona. We only bought 1, 125gram kit that was two small pouches. I think it would be enough to do all your intake ports. The cost was $48.00 plus shipping. The only problem is this, it solidifies in 3 to 5 minutes, you had best be quick. Or seperate the contents of each packet into equal parts and mix in portions at a time. Good luck with whatever you decide to do, F1~

P.S. the Belzona line has several different but similar products, you might want to talk with a rep to see which would be the best for you.
 

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It was a really old Trane at HP Palo Alto. I don't qualify as a chiller nerd, I'm a pipefitter for Local #393 in San Jose. I've installed a few over the years, but when I'm done a start up tech comes in behind us to commision them.

The chiller had a rust through spot on the bottom, I ground it all clean and applied the Belzona. We only bought 1, 125gram kit that was two small pouches. I think it would be enough to do all your intake ports. The cost was $48.00 plus shipping. The only problem is this, it solidifies in 3 to 5 minutes, you had best be quick. Or seperate the contents of each packet into equal parts and mix in portions at a time. Good luck with whatever you decide to do, F1~

P.S. the Belzona line has several different but similar products, you might want to talk with a rep to see which would be the best for you.

Local 393 Pipefitter here too....Been to HP Palo Alto....:)devil

I didn't know you could buy it in such small quantities...

GT :)hand
 

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Belzona is killer stuff. I have seen it used on blocks, and even on crankshaft throws.

Maybe overkill for what you need.

I used JB weld on my intake manifold to plug the top intake bolt holes that the Brodix heads don't use. After filing and sanding it smooth with the intake surface it has sealed and worked for 2 years now.
 

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Dave, If you want to try the Belzona 1221 i just happen to have some extra. There are two packets totaling 125 grams and its FREE. Lets just say we use it at work. Send me your address, give me a couple days and i`ll get it on the way. The only advise i`d have on the stuff is when you think you have the metal clean enough to apply, clean on it some more.
 
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