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Super A block update

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VAJerry

03-02-2004 16:45:15

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Bought a die grinder today and start to grind the weld off. Started to fly off in chunks. Got it all off, now this is what I have: a crack that runs from the front under the second manifold bolt back to just in front of the bolt holes where the air cleaner mounts. About 12 to 15 inches. The last 2 inches or so are about 1/2 to 3/4 inch wide. Looks like when they welded it they burnt though the block several times before they were able to build up the bead. Now I don't know if JB weld will cover this satifactory or not. Another thought would be to get some 3/16 steel and weld it in place, covering the whole mess. Asking for input.

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lee

03-03-2004 08:06:36

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Re: Super A block update in reply to VAJerry, 03-02-2004 16:45:15

There are probably some better products out there other than JB weld. May be worth some internet research. Permatex, Loctite, etc., Ferro Cordobond Epoxy Repair Systems might be worth looking at

.http://www.ferro.com/our+products/liquid+coatings+and+dispersions/products+and+markets/cordobond+epoxy+repair+systems/

Muggyweld seems to have big claims for their welding products.

Link

There is a lot of info out there on mechanical repair fasteners, stitch pins, etc..

A stainless steel patch pinned and screwed in place with an appropriate sealer behind it may be an option.

Your crack seems quite severe. A combination of methods may be needed. Do you have any pics? A quick repair and hunt for new block may be an option.

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Dan Kelley

03-03-2004 06:56:19

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Re: Super A block update in reply to VAJerry, 03-02-2004 16:45:15

A long time ago, my shop teacher had a part braized back onto a lathe. Again, it was cast iron, and he was adamant that welding never works with cast iron. That braized chunk stood up to a bunch of junior high kids for years and years.

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Will@Ont.ca

03-03-2004 03:32:18

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Re: Super A block update in reply to VAJerry, 03-02-2004 16:45:15

Jerry the plate bolted to the block is the shurest way to go unless you or a welder is dam good at welding cast which can be very tricky to mend.The reason being is my welder buddy told me that when they made a lot of the castings they put in what ever they had the most of because steel was scarce 50yrs ago therefore it's hard to know what rods to use for a match.GOOD LUCK!!! WILL

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Stan(VA).

03-02-2004 21:08:54

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Re: Super A block update in reply to VAJerry, 03-02-2004 16:45:15

I wouldn't recommend trying to weld steel to the cast iron [unless you're alot better than I am ;) ]. I've heard of bridging a gap like that using a backing like hardware cloth tied to a dowl or pencil on the outside, then remove the tie after the first coat or two have dried and finish it. Another option I saw once was a dealer repair to a large whole in a Super M block was to shape a piece of mild steel to the contour and drill and tap holes around the perimeter and make a gasket to fit. It looked suprisingly good and had held up for several decades.
Stan(VA).

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