Filler neck disconnected partially from cast iron heat exchanger

[Bob Skelly]

I’m trying to figure out a repair method. The old Cummins 903 has no visible serial number. The label on the valve cover is destroyed. I cannot see the numbers that might exist above the seam for the block and sump. <br />I was thinking of removing the old neck and buying a new one from sbmar.com. They want a serial # to determine if the one they have in stock is going to fit. <br />I really don’t want to remove the exchanger in order to fix it. 50 year old bolts in cast iron should not be disturbed. Any thoughts?

Topic

[Tony Athens]

If it was me, I’d look around for a filler neck with a flange built in to it, and then figure  out a way to adapt it to your old  rusty iron tank..

 

Yes, you’d need to clever and totally hands-on  to do it..

 

 

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