also the turbo to sump rubber return pipe must have hose clips on it were it connects to the sump and the main turbo drain pipe and also make sure the pipe is on tight and correct without rips.when you give it large it pisses out here also and it give the impression that the sump gasket is leaking.
these two problems caused me a small bit of after a rebuild [/quote]

DOESN'T have this type on a Frst(bolted both ends)!

have you checked the oil light switch????