Depends on the event that lead to the head gasket giving out. What happened to cause it?
Is it smoking? Is there coolant mixing or oil mixing? Any knock?
It could be a simple-ish afternoon job or it could require a full rebuild/swap due to internal damage.
http://www.300zx-twinturbo.com/cgi-bin/manual.cgi Check out this link. I use this for everything when I work on my 300zx. This exact link will take you right to the section that gives step by step instructions on how to replace the oil pan gasket. Good Luck
As long as the engine is VG30DE.
Unfortunately you will have to remove the engine to get at it.
try checking the gasket around the intake that should fix it
The intake and exhaust manifolds, along with the timing belt will have to be removed to gain access to the head. Remove the head and replace the gasket. Torque the bolts down to the manufacturer specs and in the order Nissan suggests.
replace coil springs in a nissan 300zx
The vacuum modulator on a 300zx should be located on the rear of the engine. It is on the passenger side at the top, close to the firewall.
should eather be at the top in to engine or on bottom hose coming from engine
i have a 300zx Nissan and i need to replace themultifunction switch i don't know how?
Which one? Then my answer, "When it stops working within specifications by the manufacturer."
BIG===BIG JOB I suggest taking it to the garage as it will take a backyard mechanic weeks to do. Replacing the head gasket on any vehicle is a long and complicatedprocess, however if you wish to see basic step-by-step instructions goto the related question on the right side of the page"How do you replace a head gasket?"
Yes it will