CMP gauges

[Phil Waterman]

Originally posted by Tony Smith
Phil, your gauges have been Americanised. Your Temp and Oil gauges are mechanical with a capilliary to the engine (should be electrical) and the dash lighting covers are from a Dodge or GMC.

I wonder if the Chevy CMPs supplied down to Australia did use electric temperature and oil pressure. This might have been done because of the trucks being shipped in the knocked down state. The temperature gage units are particularly prone to damage.

Checking both parts and manual, it would appear that Chevy CMPs gages both the early (square unit) and later (round individual gages) had mechanical oil pressure and temperature gages. In the early style (square unit) where the standard civilian instrument cluster unit with the oil pressure unit feeding from an 1/8 inch line reading from the oil pressure regulator plate. The temperature gage unit used the standard Chevy capillary tube with the sending glob in the fitting at the end of the block. The temperature gage units are a pain because they are a single unit including the tube.


The picture in my first shows the instruments as I aquired the truck in 1979 at that point I do not believe that any of the instruments had been changed. You are correct that the same style gages are used in the later CCKW including the insturment lights.

In the parts listing below you will note that there were different lengths listed for the temperature gage for the different cap styles.