320 Engine question

[john ullrich]

On the 320 large engine for 1937 there is a 3/8 tapped outlet in the block located drivers side just next to the crankcase ventilator and hiding right behind the generator.......what is this for????

Thanks AACA

 

[MCHinson]

Can you post a photo? I checked both of my 1937 320 engines and while they both have a solid boss that juts out just behind the crankcase ventilator, neither of them is drilled and tapped. I would guess that it must be left over from an earlier year's version of the block. Maybe your engine is an earlier production than my two and they stopped drilling and tapping them when they realized that they no longer needed to? What is your engine serial number? If it is earlier than mine, it would be interesting to see a 1936 320 engine and see if there is anything attached at that point. 

[37_Roadmaster_C]

I am away from my 37 so I can not look, but I seem to remember a water jacket plug in the area the OP mentioned. I thought it was to drain the water jacket. I think the plug was around 1/4 inch pipe thread. Not sure of this....