Hello again.
Sorry for the delay in replying. I'm still trying to get my van engine to work properly. I have a new question but will post that separately.
Here are a couple of photos of what my van is like and where the engine is located.
As mentioned earlier, it's a 1983 VW LT28D. The 28 signifies the gross weight of the unladen vehicle. The D is 'diesel'
This van would have been taken direct from the VW factory to Karmann, who produced many different camper conversions on behalf of Volkswagen.
Anyway. The engine is located in the cab, between the seats - actually in this case underneath the passenger bench seat. The bench seat folds up and out of the door to enable work on the engine from inside; predominantly accessed from above.
There is a solid, removable cover which clamps down over the engine when not being worked on.
I've not had this cover on very much over the last two months
Here are a few photos (sorry the first is sideways):
