The pressure in the cooler is whatever pressure the oil-system as indicated on the gauge is at....
No point in draining cooler on oil-change, the Injection-pump also contains around half a litre of oil, which doesnt drain when oil-changing....
So the extra effort of draining the cooler isnt much value...
If you have issues of oil left in the system, Do an oil system flush with a cheap oil when you do your change....
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http://i190.photobucket.com/albums/z...0TDnoplate.jpg
Alastair AKA H.C.II South Wales, U.K. based member
W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.
W114, 1975 280E Custard Yellow,
-Great above decks
needs chassis welding--Really will do it this year....
