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CWPASADENA · 12-02-2019, 07:37 PM

This crack is probably a result of the water in the engine freezing. This is not uncommon.

The first Model A engine I rebuilt back in the 1950's had a freeze crack in the same place. I had it pinned and that was considered a permanent repair. It never caused a problem.

I would think that JB Weld may be considered a temporary repair.

If you do use JB Weld, I would be sure the surface you are applying it to is CLEAN BRIGHT METAL, I would use a rotary file small grinder to prep the area.

I would not want to use anything that involved heat. This is not a high stress area, it is just the bottom of the water jacket.

JMO,

Chris W.

12-02-2019, 07:37 PM	#5
CWPASADENA Senior Member Join Date: May 2010 Location: PASADENA, CA Posts: 1,884	Re: That "Opportunity Knocks" Engine This crack is probably a result of the water in the engine freezing. This is not uncommon. The first Model A engine I rebuilt back in the 1950's had a freeze crack in the same place. I had it pinned and that was considered a permanent repair. It never caused a problem. I would think that JB Weld may be considered a temporary repair. If you do use JB Weld, I would be sure the surface you are applying it to is CLEAN BRIGHT METAL, I would use a rotary file small grinder to prep the area. I would not want to use anything that involved heat. This is not a high stress area, it is just the bottom of the water jacket. JMO, Chris W.