V6 12v oil leak question

[Ingo Rautenberg]

Thanks to everyone regarding my AC question.  The first AC shop I  
took the car to said it was R12 and no 134A and they only work  
through the low side and that obviously it had been retrofitted with  
a newer Condensor.  Yeah, right!  I'm taking it to a local tech for a  
purge and fill.

Where are likely areas where oil leaks on these aside from VC gaskets  
and Headgaskets?  Any hoses I should look out for?  There appears to  
be oil underneath the intake manifold, but I'd like some ideas before  
removing the IM.  Patient is a '93 90s

TIA

Ingo