I ahve a new sump plug but i don't knwo which washer i should be using

There is a plastic on or a metal on with a rubber inner bit??

it's a pinto

I am changing it as the last one had been put i with no washer and is thus leaking!!

Thanks chaps

Rupert

use the rubber one but make sure both surfaces are clean and flat -run a smudgen of oil onto the rubber prior to putting it in.-do not over tighten just a nice nip.

Thanks very much! Will go and do it this evening!

Rupert

The plastic one was fitted as standard by Ford

so is the rubber one better???

There was what looked like a very thin one on a sump plug i saw from another engine. the one in the pack i have is prob about 1mm thick

Rupert

Rubber/steel ones are better. The plastic ones tend to loosen off and/or leak. Ive never seen one fall out, but Ive seen them awful loose. I always replace the plastic ones on customers cars when changing oil.
Cheers.

Great thank you everyone! The metal one it is!

Rupert