Help - Vectra 1.8 DOHC timing???

I'm after advice on the timing marks on my DOHC sprockets on my 1998 Vectra.

Looking at the sprockets from the drivers side with the cambelt cover off:-

the left sprocket has only one timing mark - marked inlet.
the right sprocket has two timing marks - inlet and exhaust

The Haynes manual only shows that the timing marks must line up with the
marks on the rocker box cover. It does not say which of the two marks to
use.

Anyone have experience with this? The last time I replaced the cambelt was
18 months ago and I had a debate going with the mechanics in the local
dealers before they agreed - only trouble was that I cannot remember what
that was!

Thanks in advance - if you can EMail me direct at I
would be very grateful.

Cheers,
Ron.

 

Thanks for that. I have done as you said, but proving difficult to start.

Ron.