So I’m replacing the clutch in the G soon and I have everything I’ll need, even new flywheel/PP bolts/starter/crankshaft position sensor

But the rear main seal is also on my mind, is it a serviceable part? If so, does it just pry out or does it have some case housing like you’d see in some other cars. I know the G35 had a rear main seal cover/housing that had to be removed with the seal itself. I don’t see that on this car, could be wrong though.

Should I even consider replacing it if it’s still looks intact? This is quite a job and I’m by myself so I only wanna do this once :P

 

According to the FSM the rear oil seal is just pressed into the block:


The million dollar question is "should you replace it?" Depending on the age and mileage on your engine I would say yes. As you indicated, you will already have everything removed and would not want to do it twice. That said, there is the saying if it ain't broke.... ultimately you will have to make that final decision.

The seal is only $35 (not incl. tax/shipping) from Infiniti:


(Ignore that $150 core charge- obviously a error)

Perhaps others who have torn down this engine will have other advice/opinions. Either way, good luck with your project!

 

I'm going to assume the seal is installed dry(?) and thank you, hopefully all goes well. Engine has 103k miles on it, the previous owners wore out the clutch pretty hard, but got a good deal. I was never able to wide open throttle any gear and never experience the full power that this engine can do.

 

I always apply a thin coat of oil when installing any type of seal. It won't hurt a thing and will reduce startup friction.

 

just around the inside right, not the outside?

 

Yes, the inside diameter of the seal where it contacts the crankshaft. Just a thin coating is all. Probably not necessary but old school always worked for me.