Another Window Question

[sb2002]

The passenger side rear window on my 1972 3.0cs doesn't want to move. I've popped the cover off of the interior trim panel and see that the motor tries to turn but the white plastic gear barely moves. When I try to manually turn the gear, there's a lot of resistance and it tends to spring back to where it started - and I can't turn it much (it feels different than the driver's side).

Does anyone have any additional thoughts on things to try before I take the trim off to look at the regulator?

Thanks,
Steve

 

[adawil2002]

If the motor is trying to spin, give the splined gear a nudge with a flat bladed screw driver or the plastic window tool while pressing the window switch.

 

[lloyd]

The passenger side rear window on my 1972 3.0cs doesn't want to move.

When I try to manually turn the gear, there's a lot of resistance and it tends to spring back to where it started - and I can't turn it much (it feels different than the driver's side).

Does anyone have any additional thoughts on things to try before I take the trim off to look at the regulator?

Fairly certain this has been discussed on this forum before and might be found using the search function.

This may or may not be your problem. Notice that each window should have an adjustable rubber bump stop. The rubber can soften or degrade over the years and can also become stuck against its opposing contact. Breaking the contact may be all that is preventing your window mechanism from moving. If it is indeed stuck or welded to its opposing contact, you might try a solvent, e.g., WD40 or, if you are impatient, a carefully handled razor blade.

 

[Mal CSL 3.0]

My rear window wasn't working and was behaving as yours is doing. The motor on mine seemed to be spinning and made a grinding noise but wasn't raising the glass. I think the splines were worn out on the motor spindle. When I bought my car the dealer promised to fix it FOC. They went to great lengths - imported a rear working second hard window regulator and a new motor from USA. Now it is very smooth and the fastest of the four (like a modern car window). Seemed to me like a very expensive fix (over $1000). I hadn't expected the entire window regular and motor both needed replacing. The workshop told me once these E9 electric window stop working, replacing the full mechanism ie regulator and motor is the only way to do it properly.

 

[jmackro]

Seemed to me like a very expensive fix (over $1000)....The workshop told me once these E9 electric window stop working, replacing the full mechanism ie regulator and motor is the only way to do it properly.

For $1,000, I'd tell you that too. But that doesn't make it correct.

The regulators themselves usually last forever, especially the rears, since they get less use. However, the grease on the regulators turns to glue as it dries out. On the front windows, the alignment of the glass, channels, outer trim, inner trim, ..... all influence how much friction needs to be overcome before the window can move. And the grease in the front windows' rear channels also turns to glue; removing/replacing that lubricant helps too.

Re-aligning the window and re-lubricating the moving parts will usually gets things working again.

 

[Mal CSL 3.0]

For $1,000, I'd tell you that too. But that doesn't make it correct.

Well the classic car dealer who sold me me the car shouldered the cost for repair fortunately.

They gave me back the old rear window regulator (a large, damm heavy thing). I am going to take a look at it closely to try and identify what part of it was broken, that made them choose to replace the entire guts of the rear window.

 

[jmackro]

They gave me back the old rear window regulator (a large, damm heavy thing). I am going to take a look at it closely to try and identify what part of it was broken, that made them choose to replace the entire guts of the rear window.

Please post a photo if you do see something broken. I'm not saying it would be impossible for one to break - just that the rears usually don't get much wear and the motors don't have enough "oomph" to break them if something were to jam.

 

[deQuincey]

My rear window wasn't working and was behaving as yours is doing. The motor on mine seemed to be spinning and made a grinding noise but wasn't raising the glass. I think the splines were worn out on the motor spindle. When I bought my car the dealer promised to fix it FOC. They went to great lengths - imported a rear working second hard window regulator and a new motor from USA. Now it is very smooth and the fastest of the four (like a modern car window). Seemed to me like a very expensive fix (over $1000). I hadn't expected the entire window regular and motor both needed replacing. The workshop told me once these E9 electric window stop working, replacing the full mechanism ie regulator and motor is the only way to do it properly.

wow, it seems to me a pretty good way to fix our cars, i would add, if the electric window stops working the only way to get back that function is to replace the whole coupe with another one that has working windows... !,

these are very straight forward mechanisms, you can have broken bits inside but generally speaking dirt and the deterioration of the grease (into oil and soap) are usual suspcts,


http://www.e9coupe.com/forum/threads/rear-windows-motors-and-trim-panels-regrease-and-renewal.11320/