suj
Paid Member
2 things Turkie,
1) OEM temperature gauges are not accurate, it's more to let you know "oh no it's about to blow" and "oh no it's too cold"
2) I did same as you, tracked what the needle looked like at what temperature through the OBD, it's not a linear progression from 2nd to 3rd line, as like I said it sat just under the third line (which I agree is 90-92degrees) but it was reading 72-73degrees (on a steady cruise on motorway), but then I coaster coming off at a junction and it dropped to 69 (this was old failing stat) and that got above the 2nd line.
But did same on new stat, it only dropped to 72 from 75.
When the stat fails, it doesn't close perfectly, so it overcools. They're designed to fail "open" to overcool, than fail "closed" and cause overheating, they're a really old design really and haven't changed in so many years (until now with many having electronic stats, even though my 1999 740iL had it lol).
To me it sounds like yours is failing (not totally failed), many people have ran it like that like Nath said above with no problem, but to run correct you need to change it really.
1) OEM temperature gauges are not accurate, it's more to let you know "oh no it's about to blow" and "oh no it's too cold"
2) I did same as you, tracked what the needle looked like at what temperature through the OBD, it's not a linear progression from 2nd to 3rd line, as like I said it sat just under the third line (which I agree is 90-92degrees) but it was reading 72-73degrees (on a steady cruise on motorway), but then I coaster coming off at a junction and it dropped to 69 (this was old failing stat) and that got above the 2nd line.
But did same on new stat, it only dropped to 72 from 75.
When the stat fails, it doesn't close perfectly, so it overcools. They're designed to fail "open" to overcool, than fail "closed" and cause overheating, they're a really old design really and haven't changed in so many years (until now with many having electronic stats, even though my 1999 740iL had it lol).
To me it sounds like yours is failing (not totally failed), many people have ran it like that like Nath said above with no problem, but to run correct you need to change it really.