engine temperature reductions

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15 Dec 2003 14:49 #1116 by Dave Henderson
Dave Henderson replied the topic:
In keeping with the Josh malks comment on the lack of vent holes (to the heads) in Cord thermostats, I looked at three different makes and they are all without any such holes. Only one 'stat bore the maker's id, Bishop and Babcock Mfg. Co. (Another said HRD 54). I had never noticed before, but all three appear to have been individually calibrated at the factory by the rotating of a threaded shaft affixed to the bellows, and then soldering it to lock the position.
Overheating was a topic of discussion when Lyman Greenlee wrote words of wisdom in his Cord booklet over 50 years ago. Even then, with many fewer years of dust and rust, here is what he had to say:
"Old blocks with years of service will be limed and full of rust and
corrosion. Much of this can be scraped out when the motor is
disassembled. It is very important to thoroughly clean all water
passages, but care should be used with acids to avoid damage
to car and owner. It will pay to have the block cleaned on any
complete rebuilding job. Failure to do so will probably result in
a job that overheats badly and hot spots will develop due to poor
circulation. These are very hard on the motor and may result in
permanent damage".
Dave

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15 Dec 2003 15:02 #1117 by Dave Henderson
Dave Henderson replied the topic:
P S. Make that "vent holes FROM the head" in the thermostats, not TO the heads!
One other of Greenlee's suggestions:
"To stop leaks around head bolts, put an expanded 10-mm spark
plug gasket under each bolt head below the washer".
Dave

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