Number plate light holes

[Bud5000]

The two holes where the back of the number plate lights go measure 32mm. Is that about the standard size for an early plus 2 or have these ones been made bigger?

[alan.barker]

I think you only need holes for wiring grommets. You need to seal them too to stop water draining into the Boot.
Alan

[jono]

Those have been made bigger but I don't think it matters.

I used 10mm thick self adhesive closed cell foam strip around the recess to control water ingress - it gets compressed to form a seal when the bumper is fitted.

[Bud5000]

Thanks team, I like the idea of the compressible foam. May use that and the addition of wiring grommets to hopefully give it a super seal.

[draenog]

In case it's of interest, this is what I found when I removed the rear bumper on my 1970 +2S. From what I could see, there was the remains of the original factory sealant which had been covered over by a later paint job (the car has only been repainted once). There was a thick circle of sealant around each number plate hole, and a line of sealant around the rim of the "dip". There is also a plug between the number plate holes (which can be seen on your car).

[Bud5000]

Sealant seemed to be the answer for everything and directly from the workshop manual. No matter.
The "plug" on mine is in fact a bolt head where the support for the boot lock is, I believe.