Re: HELP The Plot Sickens

Posted by lee on April 08, 2006 at 19:47:40 from (12.6.154.110):

In Reply to: HELP The Plot Sickens posted by Allan In NE on April 08, 2006 at 10:13:40:

those work by expansion of a fluid sealed in the
large bulb in the water jacket and passing thru the very small internal diameter capillary tube running to the gage. That jacket or insulation over the tube isn't real important. It's mainly to protect the capillary from abrasion and not to thermally insulate it but you probably don't want the tube running against extremely hot parts like an exhaust manifold. Some moderate heating or cooling of the capillary tube itself may occur as the tube traverses from the engine block to the gage but that isn't going to affect operation. You can test the gage by immersing the bulb in a pot of hot water, heat to a known temp ie 180 and see if gage responds accordingly against a known good thermometer

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