Is my radiator cap broken and needs replacing ? 2005 zd30ddti

[Limmy]

Hi Guys

Just had a look at the main radiator cap . It looks like its missing the bottom bit i'm not sure. I hope the bottom bit hasn't fallen off into the radiator !!
I compared the main cap with the plastic bottle cap . It looks different ? ( first pick compared to second one )

Advise please guys !

[nissannewby]

No but they should be the other way around.

[Limmy]

I tried to put it other way round . doesn't fit

[nissannewby]

No your right ...:/ I mucked up on that one. But it's not broken that is how they should be.

[Limmy]

thanks heaps

[NP99]

I tried to put it other way round . doesn't fit

Rubber side down!

[Limmy]

ahhh thats why it doesnt fit lol