And also that they go together EASY
so the full deal...
Heat oven to 100 degrees
Put a flat tray in the oven for the light to sit on, so there are no grill's or raised bits of the oven touching the light in one spot where it can damage/melt (make sure light is evenly placed in the oven/heat is not going to one spot)
Make sure no rubber seal or any meltable bit is touching a hot part of the oven so you do not damage the area. The plastic of the light surround is made of thermoplastic, it will not be even close to melting at this temp, just make sure you do not concentrate the heat on any vunerable part
leave in for 10 min at least (I tried at 85 degrees for 15 min; it does not activate the goop, must be at 100+ for the glue to become soft)
pull apart from one side and lever off all the way to the other side, this is probably the hardest part, if it is not pulling apart easily leave it in the oven longer, once the goop is at the right temp it will move
After both pieces are seperated..
I would REALLY reccomend using a tool to move/rearrange any goop which has pulled out now WHILE IT IS HOT, if you place it all back in line with the seal now it will stick back together naturally (basically the glue can become very messy and stringy like mozzarella but no where near as bad, clean up the strings NOW while its still soft)
Clean inside of the light and fix whatever else is screwed (my lights like many others will find have been de-xenoned by complience for ADR [because the xenon was too bright]... yay... so crappy h-bulbs were fitted instead of the v.pricy xenon bulbs and the ballast setup [and as result the wiring for the stock balast has been butchered and balast gone]... I have not completed the restoration back to xenon yet but will soon, apparently the kit to go for is bosche HID kit for D2R fittings [D2R is the code of the xenon fitting/plug used in the light] )
If you clean it all up sweet the light will glue back together very easily, it presses together into the seams with minimal force
Just heat both parts back up to 100 and push together till it has sealed, have the 5 clips and 2 screws ready to put in while still warm, I had no issues at all with this part, prep of the seams/glue will make it go straight in
hope this helps, will update when I return the light back to proper power/bosche kit