Question: How do you remove the sun roof from an MG Y/YB?
Reply: Removing the Y-Type Sunroof
The Y-Type sunroof, or “sliding head” is a pretty simple and effective form of air conditioning. In combination with the opening screen, it can make travel in hot climates very refreshing and civilized.
So how does it work – firstly the handle – the roof locks in position by turning the handle through 90 degrees. This lifts the back edge of the panel and pushes to against the fixed roof panel. Conversely, unlocking lowers the back edge so it can slide below the fixed roof panel.
The panel slides on a lip of steel at each corner of the sliding panel – form a "V" with two of your fingers and drop your other hand into the "V" little finger first – this is how the "V" slides on the lip. When new the "V" slides were made from felt – unfortunately over time this felt can rot and even be eaten by insects, so it is rarely there when you pull an unrestored roof from a unrestored car. Some people like to put new felt back, while others I know have tried leather as well. My personal choice is felt that has been treated with wax – this provides natural lubricant, without attracting grit and resisting moisture.
To service the sunroof you need to remove it from the car – there are no shortcuts, so make the decision to do it properly. It can be done by one person, but it is a whole lot easier with two people.
Unlock the roof. If you do not see it drop at the back, the rubber strip at the back stuck to the fixed panel. You need to free this up so that the rear of the sunroof drops: use your imagination, but try not to dent the steelwork or scratch the paint.
Now that it has dropped, slide the roof to the rear about 4 inches (or 100mm if you are a younger person). It could be hard, but you need to persist, try rattling it side to side, up and down, anything goes, just get it back. Next, remove the sunroof handle – don’t loose the retaining screw – it is special, and don’t drop the handle on your toes – it hurts. Don’t ask me how I know this.