Have had three thermostats fail between my two 75s. One actual stat failure and two with split casing.
The stat one lasted about 5 years and 55k. the replacement lasted two years and 14k miles before it split.
The last split casing one was original fit on the car and went at about 65 k miles and 8 years.
As there would appear to be some truth in the theory that stats and plastic housing fitted originally were of better quality that later replacements I went for a metal replacement.
No problems in fitting and no leaks yet.
The only downside is that the warm up time has about doubled which in the cold weather over the past month or so has increased fuel consumption a fair bit.
As suppled by Kaiser the stat is an 80c one. I was wondering if say an 85c or 88c would be a better bet in the uk. Any one any thoughts ?? Kaiser ??
And would an MGR Stat (which I believe is an 88c one) be a suitable replacement.