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Question regarding window motor replacement

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Old Mar 24, 2013 | 01:29 PM
  #1  
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From: Levittown/DelcoPA
Car: 1991 RS
Engine: L69?
Transmission: 700r4
Question regarding window motor replacement

I'm doing it either today or tomorrow, just curious because I've seen people post about taking just the motor out without drilling anything. I haven't looked in there yet, but is it really possible to just squeeze your hand up there and remove a few bolts or something? I can't imagine having two threads on this site with PITA procedures of removal if you can just fit your hand in there and do it that way.

Also, would I have any problems if the window is stuck all the way up? It never worked when I bought it, was curious about that as well though.

Last edited by RavageTheRoad; Mar 24, 2013 at 01:42 PM.
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Old Mar 24, 2013 | 03:11 PM
  #2  
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From: Salt Lake
Car: 1989 IROC & ROLL-Z
Engine: L98 Vortec FIRST TPI
Transmission: T56, Mech Speedo
Axle/Gears: G92 J65 3.27
Re: Question regarding window motor replacement

https://www.thirdgen.org/forums/body...tall-easy.html
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Old Mar 24, 2013 | 03:43 PM
  #3  
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naf
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From: Lexington, SC
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: Question regarding window motor replacement

It's easy to get a wrench on them and remove them or tighten them. It's another issue altogether getting them started on the threads. You'll see when you get there.

I used JB Weld to attach the nuts to the back of the housing so I could get the bolts started. Then held them in place to tighten with an open end. The JB Weld was used sparingly and wouldn't hold up to torque.
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Old Mar 26, 2013 | 11:35 AM
  #4  
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From: Levittown/DelcoPA
Car: 1991 RS
Engine: L69?
Transmission: 700r4
Re: Question regarding window motor replacement

Originally Posted by naf
It's easy to get a wrench on them and remove them or tighten them. It's another issue altogether getting them started on the threads. You'll see when you get there.

I used JB Weld to attach the nuts to the back of the housing so I could get the bolts started. Then held them in place to tighten with an open end. The JB Weld was used sparingly and wouldn't hold up to torque.
Thanks to both of you. I actually ended up doing it the easy way, was a lot easier than expected.
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Old Mar 27, 2013 | 07:14 PM
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From: Salt Lake
Car: 1989 IROC & ROLL-Z
Engine: L98 Vortec FIRST TPI
Transmission: T56, Mech Speedo
Axle/Gears: G92 J65 3.27
Re: Question regarding window motor replacement


Some people have a real hard time with the "easy way" due to having to drill holes. I guess when you sell the car, you can take the door panel off and show the buyer you did it the right way and didnt drill those silly holes!
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Old Mar 27, 2013 | 09:47 PM
  #6  
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From: Levittown/DelcoPA
Car: 1991 RS
Engine: L69?
Transmission: 700r4
Re: Question regarding window motor replacement

Originally Posted by Keoman

Some people have a real hard time with the "easy way" due to having to drill holes. I guess when you sell the car, you can take the door panel off and show the buyer you did it the right way and didnt drill those silly holes!
Yeah that didn't bother me at all, I didn't get all the hate in that thread. Someone that doesn't know these cars would just assume it was supposed to be that way unless you tried to cut the holes with a saws-all and that's the "right" way to do it on many other vehicles. Either way I'm certainly glad that's the route I took.
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Old Mar 28, 2013 | 09:44 AM
  #7  
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From: Salt Lake
Car: 1989 IROC & ROLL-Z
Engine: L98 Vortec FIRST TPI
Transmission: T56, Mech Speedo
Axle/Gears: G92 J65 3.27
Re: Question regarding window motor replacement

I have to give the local expert his due credit and post this also.

Originally Posted by Vader
Several observations:

First, I'll agree that all of the Tech Articles posted on the site aren't always 100% accurate, Also, they generally offer only one means of accomplishing a task. There are always alternate methods.

Next, power window motors, whether on ThirdGens, FourthGens, "Honduhs", or anything else for that matter, typically fail for a reason, not just randomly. The two main reasons are it reaching the end of a useful life, or overload. More often than anyone might believe, overload is the cause. That frequently happens to coincide with the age of the vehicle, and is inadvertently attributed to "an old, worn out motor".

The reason for the coincidence is that window channels, guides, and the regulator mechanism lose their lubrication, causing the window to become harder to operate. The windows on older vehicles also frequently require adjustment to prevent binding. Simply replacing a motor is treating the symptom, not the cause. That's usually why a conscientious repair technician will take the extra time to remove the entire assembly, clean and lubricate it with the factory (white lithium) grease, then adjust the stops, guides, and regulator alignment to insure smooth operation for another 15 years. It also insures correct window glass position on closure to properly contact the top, front, and rear seals.

You can replace just the motor, but you'll probably be back a lot sooner than the original motor lasted.

As a side note, most of the window motors I've replaced have failed due to worn brushes and/or an overheated thermal overload that no longer resets (due to the aforementioned overloading). When the commutator is cleaned properly, a new brush holder and overload assembly can be installed easily without removing the motor, without drilling anything, and in less time than replacing the motor as you suggest. If you want to take a shortcut, that might be worth investigating instead:

Power Window Motors.pdf
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Old Mar 29, 2013 | 04:20 PM
  #8  
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From: Levittown/DelcoPA
Car: 1991 RS
Engine: L69?
Transmission: 700r4
Re: Question regarding window motor replacement

now I have a really strange problem. The window goes up in "clicks" as if the gears aren't catching, and afer a few days of this, it has trouble moving at all. How could I have messed this up, it was so simple? The motor was bought brand new. granted, I only have two screws holding the motor in, I tried using different configurations but I can only ever get tow of them in because the third one never sits flush against the regulator and if I force it into place the motor can't lift the window. It is still secure, during all the clicks on the way up the motor doesn't shift or move. I don't believe anything is bent seeing as all the factory rivets were in place when I removed the old one. Is there something I'm missing?
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Old Mar 30, 2013 | 08:03 AM
  #9  
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From: Levittown/DelcoPA
Car: 1991 RS
Engine: L69?
Transmission: 700r4
Re: Question regarding window motor replacement

ttt

could the problem just be that the track needs a fresh coat of white lithium? it has some old grease that has semi hardened in places. it still is viscous but it's more of a glue texture than grease. It still seems to be mechanical though, like the gears aren't meshing well. Can the ratchet mechanism on the regulator wear down? The motor is brand new and the cog on that is perfect.
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Old Apr 12, 2013 | 08:14 PM
  #10  
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From: Salt Lake
Car: 1989 IROC & ROLL-Z
Engine: L98 Vortec FIRST TPI
Transmission: T56, Mech Speedo
Axle/Gears: G92 J65 3.27
Re: Question regarding window motor replacement

I just took my doors apart on both sides to replace my window sweeps and gave my windows a nice once over to make sure they were lined up and functioning properly.
I coated the rails in lithium grease along with pretty much every metal on metal rub spot. I then proceeded to find as many adjustment points as I could and see what each one did to the window position. Took about a half hour of thinking about each one working with the other but its really not that complicated. After adjustment, the windows work better than ever, NO squeaking/moaning/scratching noises when you roll them up or down. The doors close better than ever and I have eliminated the wind noise. Win/win/win
Make sure your adjust them well and if you still have noise, it could be a faulty motor. Did the window make that noise right from the get go? Did you test the motor on the bench before you put it in? (always do that)
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Old Apr 14, 2013 | 12:21 AM
  #11  
RavageTheRoad's Avatar
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From: Levittown/DelcoPA
Car: 1991 RS
Engine: L69?
Transmission: 700r4
Re: Question regarding window motor replacement

Originally Posted by Keoman
I just took my doors apart on both sides to replace my window sweeps and gave my windows a nice once over to make sure they were lined up and functioning properly.
I coated the rails in lithium grease along with pretty much every metal on metal rub spot. I then proceeded to find as many adjustment points as I could and see what each one did to the window position. Took about a half hour of thinking about each one working with the other but its really not that complicated. After adjustment, the windows work better than ever, NO squeaking/moaning/scratching noises when you roll them up or down. The doors close better than ever and I have eliminated the wind noise. Win/win/win
Make sure your adjust them well and if you still have noise, it could be a faulty motor. Did the window make that noise right from the get go? Did you test the motor on the bench before you put it in? (always do that)
Yes I tested it, it had no erratic movement. The t top leaks like a sieve now where the window meets the joint where the t top comes off too so i'm guessing it's not going up all the way. I think the teeth on the regulator may be chipped or something, because it goes up at the normal speed but it still does the "click" thing. I doused the rails and wheels with white lithium to no avail. Really didn't want to have to pull the entire assembly out but i guess i'm gonna have to now. Ill try the adjustments and see what happens first. How do you go about adjusting the t tops to pull them down further into the weather striping?
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