Hi all, trying to work out compression ratio on my 1972 Series 3. Clearly has the raised level but can't tell whether there is an 8 stamped in (see arrows), or its just rusted that way?! Welcome any thoughts. TIA

Hi all, Recently bought a series 3 1972 petrol and noticed this rather annoying rattle (see attached url below). Comes on at higher revs whilst in neutral, but is more prominent when in gear (and then is across the rev range). Any ideas what may be causing it? Thanks