leak seems to be above oil filter back end of engine, could i suspect valve covers , hope not head gasket . are there any oil pipes or pipe unions near top ?this means plenum removal any help with this fiddley task on pages? last intend to replace p c v valves @pipes [ 5 pipes can only see 2] what am i missing please help one of your oldest member[69] thanks

leak seems to be above oil filter back end of engine, could i suspect valve covers , hope not head gasket . are there any oil pipes or pipe unions near top ?this means plenum removal any help with this fiddley task on pages? last intend to replace p c v valves @pipes [ 5 pipes can only see 2] what am i missing please help one of your oldest member[69] thanks

 

Have a look over at http://www.300zx.org.uk lots of things you might find useful for what you've described.

 

the leak could be a few things, turbo pipework, valve covers, oil filter itself, rear seal?

 

the pcv valve and plenum removal should be on the above link

 

also the service guides useful

 

http://www.300zx-twinturbo.com/cgi-bin/manual.cgi

 

HTH,

Ste