Mike,
Things like this can be a bit difficult to comment, as there may always be different specifications for different markets. Over here, I believe the headlights were basically identical for the 1981-93 models. I think that the parts # for glass, housing and reflectors are the same for these years, and only the trim changed for the 1986-93 models.
I just had a look at a spare light (1981-85) I have disassembled, and it is just a rubber gasket between glass and housing. There are a number of clamps surrounding the rim, one of them is actually also the stopper for the wiper.
I'm not sure, but seem to have picked up that the US models did not have the bumper change in '81 as we did. If this is correct, perhaps the '84 lamps are different too. On the other hand, could the white stuff have been put in by the PO? If there is a recess in the housing perhaps you could replace it with the rubber gasket. I'd be happy to help with pictures if you're interested.
Thanks for your kind comments re. my new web site!
Erling.
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My 240 Page
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