My '69 Silver Shadow's thermostat is stuck open. Is the thermostat a generic part or unique to R-R?
Several of the replacement options are "fail-safe" type thermostats that always fail in the open position (or default to it somehow if they fail). There are others that include bypass valves that will open if pressure gets too high.jeyjey said:The standard Crewe part has holes around the circumference filled with lead (or wax?) plugs. If it happens to fail shut, the lead/wax will melt and allow coolant flow. (It will then effectively be "failed open", but that's a lot better than failed shut.)
Do the replacement parts have the fail-safe plugged holes?