At long last – the documented window regulator “how-to” guide. Thanks to zulu for providing a rear door window regulator.
Here is how to convert a rear window regulator into a driver’s. Required components are a RHF window regulator and a rear door window regulator. The rear door regulator will provide all the components except the lift arm from the RHF regulator. All the other parts of the RHF window regulator will most likely be good for the bin only.
The first couple of images show representative FE-FC and FB-EK window regulators. Somewhat naively I thought they’d be exactly the same, but they’re not. To tell them apart, FE-FC regulators are yellow zinc-plated, while FB-EK regulators are bright zinc plated. FB-EK sector gears are different from FE-FC; FB-EK regulator bodies have two holes for the limit rivets compared with one for FE-FC. Finally, the FB-EK front window lift arms are just different enough from FE-FC that they can’t be interchanged – the locating boss is in a different place.
I’m using FE-FC hardware here, but the procedure is valid for FB-EK too.
1. Remove limit rivet.
Just drive it out with a hammer and pin punch. The metal will distort around the hole. Tap the metal flat again with a pin punch and suitable dolly.
2. Remove the assist spring.
Using a window winder handle, wind the window “up” – that’s in the “easy direction” until the sector gear disengages from the pinion. Rotate the arm until the assist spring is free, then remove the assist spring.
3. Remove the pivot stud.
This is a difficult operation. The pivot stud is high-tensile steel. I couldn’t make it budge with a hammer and pin punch, so instead I used a vice as a press, with a 7/8 socket over the large end of the stud and a 5 mm hex socket head driver bit as the drift. Most of the pivot stud’s shoulder will break off.
Option: grind the peened-over part of the pivot stud off and use a pin punch. You’ll have to weld the pivot stud back on if you go this way.
Remove the sector gear and lift arm from the window regulator body.
4. Separate the lift arm from the sector gear.
The rivet holding the lift arm to the sector gear is not easy to remove. I used a vice, a 12 mm socket, and a 5 mm hex socket head driver bit. Option: use a grinder and pin punch, but you’ll need to weld the rivet back in.
5. Drive out the lift pin and roller.
If it’s a driver’s window regulator, the plastic roller will long since have worn out, so use the one from the rear door regulator.
That’s the RHF window regulator disassembled. The only part to salvage is the lift arm. And it looks to me as if the lift arm is subtly asymmetric – the rivet holes are not exactly dead centre, and the arm has a slight bend in it. Which means you can’t just use a LHF lift arm on the driver’s side (rats).
Bugger. 5000-character limit exceeded (again).
Stay tuned.
Rob