Valve spring washer arrangement

[impaw]

Hello,

I couldn't find any exploded views of the valve spring arrangement for 2.5litre cars, so I was wondering if you could verify that this arrangement is correct?
In addition to the valve tabs and valve caps and valve "hats" I have two washers with an OD of 30mm and 20mm.
These should be placed between the caps and the springs I take it?
But are they necessary, or are they a previous owners quick fix for tired valve springs?

Thank you!

[chriswgawne]

The larger washers sit beneath the valve springs directly onto the head Torstein, presumably to allow the springs to rotate freely without 'digging into' the aluminium head,
I dont think the smaller washers are original.
Chris 

[impaw]

thank you Chris!

[impaw]

...or are the small washers meant to protect the head against the small inner valve springs perhaps?

[impaw]

Perhaps?