Quarter-light

Early unit     Roadster vs GT     Remove/refit     Vent Seals     Vent Glazing Seal     Restoration    

Early Roadster: Having a bracket on the side (left) through which two screws go into the inner door skin, instead of the short front leg for the two studs. Later roadster and all GTs (right) have a short front leg with bolts from the front of the door frame, covered by plastic plugs.

Roadster vs GT: Roadster QLs sit on top of the door on a short rubber gasket AHH7478 (RH) AHH7479 (LH):

GT QLs also sit on top of the door but behind a full-length finisher AHH7476 (RH) AHH7477 (LH):

The reason for the GT finisher is that the roof-line of the GT is a good inch higher than the roadster, which means the GT drop-glass has to be taller as well (as is the quarter-light). But there is no more space at the bottom of the door for the glass to retract into, so the additional height is left sticking above the top of the door when wound fully down. Not a good look, hence the finisher to cover the additional height.

The screw securing the triangular finisher at the lower front corner of the QL is behind the trim-strip at the top of the door on the GT, visible above the rubber seal on the roadster. Only listed for the roadster in the Leyland Parts Catalogue, the same screw is also used on the GT. Despite that the trim-strip is flat against the finisher on Vee:

Graham Moore said his screw was too big and left a gap, and looking at suppliers catalogues Moss shows two alternatives only one of which is correct, and Brown & Gammons list the incorrect screw. It should be 17H2503 which is a self-tapper with a very low profile head with integral washer:

Remove/refit by John Maguire in Australia:

Both the vent and the drop-glass can be removed and refitted with the other still in place. To remove or refit the vent by itself remove the drop-glass rear channel and slide the glass back towards the lock, then undo the vent bolts and nuts. As you raise the vent twist it through 90 degrees so the bottom bracket clears the top of the door opening.





Vent Seals AHH7435 and AHH7436:

'A' - large gap exposing pivot; 'B' - square-cut and doesn't extend back far enough: It looks like the vent isn't low enough compared to Vee, but in another picture the hinge is shown pulled down as far as it will go. It's possible a strip of rubber glued below the seal would lift it up and close the gap, hopefully without causing the sides to bow out. (Shaun Loader)

Vee and Bee: 'A' - seal fills gap (about 7.5mm); 'B' - angled cut covering pivot (not that it would be visible anyway with no gap):

Top: Rimmers, Bottom: MGOC. 'A' - Rimmers seal noticeably narrower between QL frame and vent than MGOC. 'B' - Rimmers doesn't seem to be cut away by the pivot, a thinner section extends all the way across. It's possible that this folds flat as the vent is closed, covering the pivot even though the main section filling the gap is narrower. (Shaun Loader)

More examples from Albert Ross. The incorrect seals were from MGB Hive (no surprises there) and the MGOC. Rimmers (at the time) again had the correct profile:

When the vent is open the front part below the pivot opens inwards and the part above the pivot opens outwards. When it is closed the side of the frame lies against an outside flap below the pivot, and against an inside flap above the pivot to form a seal. There is a rib between the two angled downwards from inside to outside that the front of the opening vent frame sits against to complete the seal. In the attached from Richard Massey the upper, inner flap doesn't come down far enough and so leaves a gap when the vent is closed, circled:

Without looking more closely than I can see with a picture from a web site I'm not sure that that the Rimmer's item doesn't have Richard's problem, even though it has the correct profile along the bottom:

Vee's 'old' and quite possibly original seal with a pronounced diagonal angled downwards from inside to outside. The front face of the vent frame at the rivets presses down on this, and joins the top of the outer side piece. This means that water will run away to the outside. The inner side piece comes down to about level with the outer, but it probably doesn't need to come much further than the top of the diagonal. From the outside:

And from the inside:

Vent Glazing Seal:

Flat rubber strip 27H8705 as supplied by all the usual suspects: (Moss Europe)

  My concern with this was that how to squeeze all the rubber into the bends, especially the lower corner which turns through more than 90 degrees, once the seal is folded into the channel, so I cut darts when doing both mine and Terry's. However this from Richard shows that by far the bulk of the rubber is trimmed off afterwards, so only a relatively small amount has to be squashed in to the corners:

Note the seal wraps around the rain channel at the lower front corner of the glass as well as round the glass. This channel extends beyond the pivot, so any water on the part of the glass that is brought inside the cabin when the vent is open is directed outside.

Ben Colomb's vent seal, obviously a moulded seal way too long for this application and so almost certainly for the GT rear windows, which although perhaps easier to fit leaves a gap behind the handle plate. This shows the rain channel on the outside of the glazing seal, which is not correct, although what practical different it makes I don't know:

A partially dismantled rear quarter-light showing how the seal is nowhere near as deep as the channel, so as this channel is almost twice as deep as the front vent the rear seal could well be a reasonable fit in the front vent: (Sven Hinrichsen)

Rear quarter-light seal BHH582: (Moss Europe)

I did wonder if the base of the seal might be thicker than the flat strip, but it seems unlikely, The sides of the moulded strip are thicker than the flat seal would be, but as the two channels are the same width that's unlikely to cause a problem either: (Moss Europe)

Restoration:

As received

Sheared front top stud

Bottom stud plate corroded away on one of them

As a result of a question by C Cummins on the MGOC forum, note that unlike the chrome frames above, stainless frames have the bottom stud plate pop-riveted to the side of the leg and wrapping round to the front, on both roadster and GT, instead of being riveted to the front. Also the front face of the channel is flat, and not recessed as on the chrome, so this stud plate has a double-bend to position the stud in the same place as before. Although shown detached I'm not aware they are available separately, this picture is from an eBay ad for remanufactured units. Maybe they make them, and would supply them ...

Some pitting on the handle brackets ...

... only light pitting elsewhere



Snapped hinges

Countersunk slotted screws on the opening vents, rivets to the frames on chromed units ...

... both riveted on the later stainless units. Replacement hinge pop-riveted on Vee rather than have the job of removing and replacing the glass from the vent frame.

Replacement stud plates with 2BA threaded holes

Reinforcement plates for the above stud plates. These go inside the door, short one to the front, with the hole nearest the front. Images from Leacy Classics

Plenty of clearance for nuts on top of the latch plate

Fully dismantled and ready for the rechromer

Bottom stud repair on the right. The light rusting is on one side only, to be treated along with the other one before return to Terry.

Parts as returned, the other one is just the same

Some confusions over vent pivot pins: Roadster and GT pivots are different, also curved handle (early chrome frame) and flat handle (later stainless frame) are different. I can't find any pictures of the early roadster pivot 17H2512 but there are for the others, although Moss and Brown & Gammons differ as to which is which as far as the GT images go. Roadster flat handle BHH717 is on the left below, most places show the GT curved handle item AHH7691 (stepped shank) centre and GT flat handle BHH716 (plain shank) on the right, Moss shows the GT items the other way round. At least one supplier shows the later GT item as having replaced the earlier, and I've certainly done that for this chrome frame/curved handle roadster rebuild. The stepped shank of the earlier GT item possibly requires a larger diameter tube although suppliers only show a different part number for roadster and GT, the spring was the same for all four:

Brown and Gammons confuses things further by showing the earlier GT item and without the rectangular plate at the top! I suspect that has just broken off and they didn't notice ...

A length of brass tube goes over the pivot, under the spring. This roadster one (GTs are different) that had to be cut off is 27mm long and has an OD of 0.32" and an ID of 0.255" (one end was sound enough to measure):

Two lengths of brass tubing from Bob's Models. What remains after making four roadster tubes is 10", so originally they must have been about 14". One has an OD of 0.31" and an ID of 0.285", the other has an OD of 0.28" and an ID of 0.245":

This means one fits inside the other really snugly, and the overall OD and ID are very close to the original:

Final assembly, again the other one is just the same

What an innocent-looking little thing that pesky hinge is