Fitian, you want the return lines to work and so route the fuel back to the Pollak valve (or to the tank etc), so you have to block the bottom of the bolt only. I used metal epoxy.

If you block all the holes of the banjo bolt you will have a nice mess to clean up when the return lines burst

__________________
Cheers
Bruce
http://oztayls.blogspot.com/

1976 W123 300D (3 litre 5-cyl NA diesel running on SVO since June 2006)
1982 W126 280SE (Sadly is For Sale)
1993 W124 300D (3 litre 6-cyl NA diesel - being converted to SVO)