AS a quick and dirty - I don't want to put more time/money than neccesary into it - move, you could try one of the head gasket sealing products. That engine isn't very high compression is it? Might be worth a shot, but I'd bet against it working.
-- OK Don, KD5NRO Norman, OK '90 300D, '87 300SDL, '81 240D, '78 450SLC The FSM created the Diesel Benz http://www.venganza.org/