Volks,
My 90 Carat has developed an -oil- leak at the base of the oil cooler. My oil cooler looks different than the one portrayed in the Bentley. Bentley shows a unit that has the water hoses coming out of the same side of the cooler. Mine has water entering on one side and leaving on the exact other side. I am supposing that otherwise the bolting-on are the same. 
I understand replacing the baseplate O-ring is the place to start with this issue.
Is there any procedure to remove the cooler WITHOUT removing the coolant? The hoses look so short as to mandating unclamping them.
Any tips appreciated.
Mark Magee                90 Carat 79K
Kemah TX USA
John 14:6