Cast iron surface repair

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PDGx
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Cast iron surface repair

Post by PDGx » Mon Sep 23, 2019 9:33 am

Is there anything better than JB Weld for repairing gasket surfaces on cast iron water jacket parts ?

Surfaces are severely pitted and need to be rebuilt, then filed/sanded to a gasket smooth surface.

Also have some aluminum radiator parts to do as well.

What have you actually used - and worked, or not worked ?

Only want to do this once. :(
If my short term memory gets any shorter, I won’t even have thought about what I’m going to forget.

Can’t, ain’t Possible

‘17 TT / Holmes Wrecker
‘22 Mack AC


Burger in Spokane
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Re: Cast iron surface repair

Post by Burger in Spokane » Mon Sep 23, 2019 10:21 am

Cast iron CAN be welded. Used to be it was just a stick welding option, but TIG
can be used now too.
More people are doing it today than ever before !

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PDGx
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Re: Cast iron surface repair

Post by PDGx » Mon Sep 23, 2019 11:48 am

Yes I know, I have welded the cracks, but need to repair long areas of corrosion at the mating surfaces.


Burger in Spokane
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Re: Cast iron surface repair

Post by Burger in Spokane » Mon Sep 23, 2019 4:14 pm

Not that doing build-up and resurfacing is any fun at all, but I presume it is possible (?)
More people are doing it today than ever before !

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PDGx
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Re: Cast iron surface repair

Post by PDGx » Mon Sep 23, 2019 6:36 pm

The casting will seriously crack with that amount of heat.


Lgitts
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Re: Cast iron surface repair

Post by Lgitts » Mon Sep 23, 2019 8:56 pm

On some antique tractor cast iron gasket surfaces for the radiator tanks, I've used "Lab-Metal", which is an aluminum paste. I'ts like JB weld, but comes in a can. No hardner needed, as it reacts to air. It holds well, files and sands like metal and is good to over 400 degrees, as you can use it to fill pits and it will hold up to the heat in powder coating. So far, repairs I've done several years ago have held up fine with no water weeping or problem. You can look up "Lab-Metal" on line.

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Ruxstel24
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Re: Cast iron surface repair

Post by Ruxstel24 » Mon Sep 23, 2019 9:04 pm

I used this (aluminum type) to build up, drill and tap a hole in a chainsaw exhaust mount...still holding ;)
It's made for steel and aluminum, but different powders.

http://www.qbond.com/


Herb Iffrig
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Re: Cast iron surface repair

Post by Herb Iffrig » Mon Sep 23, 2019 9:32 pm

Not too long ago I posted a link to a youtube video where a man was laser welding the rust pits on a gun to restore the surface to a smooth finish.
Perhaps someone can find the thread and bring it here for you to see.

Herb

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PDGx
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Re: Cast iron surface repair

Post by PDGx » Mon Sep 23, 2019 10:08 pm

Thanks for the suggestions.

Looks like the Lab-Metal might work better for resurfacing. Will order some and give it a try.

👍

(Boy do I wish parts were available for Mack’s like they are for T’s )


46woodduck
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Re: Cast iron surface repair

Post by 46woodduck » Sun Sep 29, 2019 2:12 am

I have used JB Weld to repair corrosion pitting in an M37B1 military Dodge and it held up fine. The stuff is almost bullet proof.
Life is good on the lunatic fringe. Tom


Marty Bufalini
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Re: Cast iron surface repair

Post by Marty Bufalini » Sun Oct 27, 2019 11:29 am

Google Belzona. It is an incredible metal repair. We used it to reattach the water inlet elbow to the engine block on my 14 T. This was a couple years ago at least. Has held up with all the heating and cool-downs.

I still have some in the garage and can get you more info on it when I get home.

Lemme know.

Marty

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PDGx
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Re: Cast iron surface repair

Post by PDGx » Sun Oct 27, 2019 3:05 pm

Marty Bufalini wrote:
Sun Oct 27, 2019 11:29 am
Google Belzona. It is an incredible metal repair. We used it to reattach the water inlet elbow to the engine block on my 14 T. This was a couple years ago at least. Has held up with all the heating and cool-downs.

I still have some in the garage and can get you more info on it when I get home.

Lemme know.

Marty
Looks interesting.. trying to get more info on it, but takes ‘authorization’ to view availability and cost. So, waiting on approval.

I have a cast water jacket cover that is seriously corroded that would benefit from it, if it can build up a large complex casting from the inside.
If my short term memory gets any shorter, I won’t even have thought about what I’m going to forget.

Can’t, ain’t Possible

‘17 TT / Holmes Wrecker
‘22 Mack AC


Henry K. Lee
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Re: Cast iron surface repair

Post by Henry K. Lee » Sun Oct 27, 2019 7:04 pm

Taking a very small rotary file on a die grinder cleaning out any corrosion is of utmost importance too. If you have an outside casting repair and you wish to regain the appearance of cast iron, try this trick. From a distance spray lightly, "lightly" some Dupli-color spray on bed liner fogging into the good area. Be prepared to be amazed. Only your Mother will know.

All the Best,

Hank

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