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Leaky cast iron rad, can I weld?

Mike T., Swampeast MO
Mike T., Swampeast MO Member Posts: 6,928
in THE MAIN WALL
Have watched two people try--the cracks run and sometimes spiderweb.

Two things I've heard to try:

1) Pre-heat entire object to 500° or so.

2) Drill small "relief holes" at the VERY ends of the cracks, braze the crack, then the holes.

Comments

  • GW
    GW Member Posts: 4,938
    Leaky cast iron rad, can I weld?

    I have a water CI rad, the 1/4" plug popped a leak and I noticed the ci is now splitting. Can it be welded? Thanks,

    Gary
    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    gary@wilsonph.com
  • John Van Hoesen
    John Van Hoesen Member Posts: 91
    JB Weld...

    Hi Gary -

    I just drilled out a crack in one of my cast iron steam radiators, I've used it on VW engine blocks before, so I figure if it can withstand that pressure, it can withstand the pressure of a steam system... tested it last night, no problems with that one. Now off to the next one that's cracked. :)

    cheers
    j~
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