Also, what type of sandwich plate are you using on the oil filter relocation arm?
There are two factory types -
One type passes engine oil out to an oil cooler (700 / 900 upto YM91) (drawing PV 220 49667)One type passes coolant into the sandwich plate and cools the oil that way (940 92+) (drawing PV220 57734)
The first type has sandwich plate p/n 1276680-4 ("thermostat housing"). There are reports of sticky thermostats in these which don't open up.
The second type has sandwich plate p/n 3507371-7 ("oil cooler"). This type taps into the coolant lines and no oil leaves the sandwich plate.
However, both types use the same extension arm.