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Vic Piano · 08-27-2014, 04:12 PM

Bruce, In '39 (most, if not all production LZ's) the temp sending unit was located in the radiator upper tank. not in the left (drivers side) head. As I understand it, they moved the sending unit to the head in '40. My '39 has a '40 V-12 in it, and the radiator has a plug where the original sending unit was located. Are the heads on your car cast iron or aluminum? If they are cast iron, they were retrofit. Its possible that your car was retrofit with '40 heads. Only the drivers side head was equipped to accommodate the single sending unit. The temp sending unit in the head is much better in my opinion.

08-27-2014, 04:12 PM	#122
Vic Piano Senior Member Join Date: May 2010 Location: Odessa, FL Posts: 7,611	Re: Yes, they are still out there NUMBER 2 Bruce, In '39 (most, if not all production LZ's) the temp sending unit was located in the radiator upper tank. not in the left (drivers side) head. As I understand it, they moved the sending unit to the head in '40. My '39 has a '40 V-12 in it, and the radiator has a plug where the original sending unit was located. Are the heads on your car cast iron or aluminum? If they are cast iron, they were retrofit. Its possible that your car was retrofit with '40 heads. Only the drivers side head was equipped to accommodate the single sending unit. The temp sending unit in the head is much better in my opinion. __________________ Imagination is more important than knowledge.