I had to replace the thermostat in my bird it stuck partil shut and caused the car to get warm but I caught it before it got past 2/3 on the gauge. I pulled it out and noticed that around 3 of the bras rivits were cracks. I talked to them at orriels and they said that they stoped carring them because of the high rate of failures. I went ahead and installed a new failsafe unit for my car. I also did the thermostat mod which is drilling 1 1/8 of a inch hole in the thermostat. I notice on the old stat woluld notice the temp going down at 194 and close at 172. The new stat with the mod temp would start going down at 188 and close at 176 providing much less tempeture swings. The temp swings on the old stats were done 2 weeks before it failed.