Quote:
Originally Posted by Bimmer 808
But the AD one has a spring like the stock piece that may open up sooner. BMS doesn't even have a spring. Can someone with the AD chime in?
|
The spring is not functional... The difference between the BMS and stock bypass (and AD) is BMS removed the bypass holes which are used to let oil flow over the thermostat element that is now no longer there. This forces all of the oil across the cooler rather than letting a fixed percentage always bypass.
Mike