<VV> 140 engine codes RB- RM differences?

[Matt Nall]

And Matt wrote:
 
The cylinder heads have different threads / hole depth  for the temp sensors.... for one

 
So Seth writes:
 
I do not agree, Matt. Both in the parts book and by my experience, all 140HP, 150HP and 180HP heads were drilled and tapped for the 3/8-24 thread used on the thermistor. That is why all 140,150,180 heads take a different temperature switch for the passenger side. According to the parts book, all Corvairs except those use one temp switch. Even when used in a Monza or 500, the fine threaded switch was used with the 140 motor. They just left the drivers side threaded hole empty. 
 

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I thought that's what I said..in an abbreviated form!!  gg


Matt Nall
Charleston, Oregon
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