Should there be an o ring on the oil filler cap?

[Mark300zx]

Get some oil seepage by the cap and noticed there isn't an O ring on it, should there be?

 

[DaveS]

If it is the same as my 2014 FR, then there is no o-ring and there is a little seepage! Maybe after 10 years the plastic clip/spring that locks it in place is getting a bit weaker.

 

[RUM4MO]

I've just checked the parts listing and it does include a seal, but it is not available separately, I'm guessing that the O-ring seal is located above the sprung discs.

If in doubt, just buy a new oil filler cap as most of these O-rings harden with age in my experience.

Edit:- 06K 103 485 A

 

[nd-photo.nl]

@RUM4MO indeed, see this as a service item. I bought the cap from Aliexpress which has an extra seal at the top, but to be honest, I dont think it does much. The primary seal is at the bottom of the oil cap.

 

[SuperV8]

Also can be a sign you have excessive blow-by or your PCV isn't working.