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      02-01-2013, 07:59 AM   #30
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Drives: BMW F11 535i Touring
Join Date: Mar 2007
Location: Scotland, Highland Region

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Originally Posted by superflyguy9 View Post
Hmmm. Was thinking, now I have seen the "Top Hose inline thermostat modification" information. IF it proves to be the case that when i clamp the pipe, I get normal ECT, then if that part is so costly to replace could there be an opportunity to put an in-line thermostat into the pipe below the Tee section that feeds the oil cooler? an 88 degree stat? could that work?
Interesting idea. Subject to getting a suitable fitting it would work in stopping/slowing coolant flow. But...

It is a bit remote from the heat exchanger, where the oil temperature is the trigger for the thermostat. You'd not be surrounding the thermostat with accurate enough sensing. Would be a gamble to whether you had any or sufficient oil cooling when necessay. Overheating the transmission oil will reduce its performance and life expectancy. Now that would be expensive, if it caused a gearbox pre-mature failure.