how do I verify the gauge is correct? --- In dmcnews@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> wrote: > Stick in a new thermostat. If you get good readings on the second > thermostat, chances are gauge is correct. > > Car comes with two bleed lines: at high points of radiator and block > (via heater core supply). These purge air continuously. Is a bleeder > valve at high point of whole system (under thermostat), but is not a > continuous purge. What many owners do is replace that valve with a > hose barb and run one more bleed line to a tee inserted where block > bleed empties into coolant expansion bottle. With all high points thus > covered, all you have to do is fill (remember: 50/50 mixture cools > better than pure antifreeze) and run the engine. System will bleed itself. > > While you're working on cooling system, don't overlook what may be > factory original hoses and seals, especially in hidden or hard to > reach places. > > John Hervey (www.specialtauto.com) sells otterstats with variety of > temperature ratings. > > PRV runs surprisingly warm. Long after engine shut down you're still > burning your fingers. After you've verified gauge reading correct (and > cooling system purged of air) rely on it, not radiant heat from the block. > > Bill Robertson > #5939 > <snip -- excess quoted material trimmed>