What is everyone opinion on welding a crack on my h23 block?

250whp high compression big cam motor, used for autox and road race. Sees 8500 every time it is driven.

The crack was caused from the sleeve being pressed in.(that's my best guess). I saw the block after the sleeve was put in, did not see the crack. Motor sipped water from day 1 and developed a misfire at 1300 miles when I tore it down to find a crack, fml

My concern is the inconsistency of the metal and it expanding/contracting at different rates.

I know it will work and run, but for my application is this thing going to last more than a few seasons?

 

magnaflux and a machine shop is the only option, my 02

 

something to keep in mind: anything done to fix that crack will require shaving the block again, which will raise the compression more, and will affect those degreed cams requiring re-degree-ing them.

 

I can adjust with the HG thickness

 

give a call over to the shop I use. they may be able to help you out, in suggestions, and in doing the actual work. and they'll be able to shave it much much smoother than it currently is lol.
their website says they do magnafluxing.

Precision Automotive
http://www.thechromehorn.com/graphics/precisionauto/

tell them I sent you

 

Correct me if I'm wrong but manga flux and aluminum does not work

 

before just now, I never knew what magnafluxing even was. a quick search told me though that it is a test performed to find cracks or flaws in magnetic metals by sensing disturbances in the magnetic field, or magnetic flux.
seems its only a testing procedure, not a repair. and can only be done on magnetic metals.

either way, I'd say give my shop a call

 

Yea i have done it before, put a large magnet on magnetic metal and sprinkle special powder on it, the powder gets attracted to the cracks. Cool ****, but not for me

 

Do you know how far down the crack goes?

 

you stole my question, but im gonna say that depending on how deep the crack is that block might not be fixable.....just my opinion thou

 

Exactly what i was thinking^

Welding the metal will only weaken it.

 

Not to sure how far down it goes. Not even trying it, got a new used h23 block to sleeve