The passenger side window on my 68 Riv, is going veeery slowly up, but at double speed down, (compared with the one on the drivers side). What could be the problem? Per. :beer
bushings and shaft in the motor may have corroded and/or the grease dried out. on an 89 chevy van I was able to pull the motor apart and clean and regrease the bushings. I regreased the bushings with silicone grease (dupont Sil-glide) the window hawls up and down now. I haven't had to do it on a buick yet but it can't be too diffrent. there will be brushes that run on the commutator (part of the center rotating part of the motor.) these are held against the commutator with springs. usally there are holes in the area between the commutator and the brushes, and allow a small wire (paper clip) to slide between commutator and the brushes if they were pushed back this allows one to reassemble the motor.
on your window regulator, there is a coiled up spring. it is supposed to help your window motor raise the window back to the up position .... its also sopposed to make the window go down at a moderate speed by pushing against the motor's force while the window is going down (hence the name "regulator")....when the spring gets weak (or breaks) it aint helpin you raise the window ...AND it is no longer pushing against your window motors attempt to lower the window..... so the window ends up creeping up and flying down... replacing the spring is extreemly difficult and can be somewhat dangerous. replacing the whole regulator is the actual repair.:TU:
the buick master parts book shows the regulator part number to be 9716588 it shows the same regulator being used from 66-70 on the riv. it doesnt show the same regulator being used on any other buicks but olds toronados might have the same one if i had my guess. if you help the motor out by pulling up some on the window while you are putting the window up ... you will be doing the motor a BIG favor. as for it going down fast .... that probably wont do harm to anything. im about 99percent sure that the regulator is your problem....but the freshinin up the motor as mentioned by tlivingd cant hurt and could help the window work better. a good test of the regulator spring is to remove the window motor(be careful because the window might fall (on you)once you remove the motor which would tell you right away that the regulator spring is bad) . if the window tries to stay in place as you slide it to different positions, the better the regulator.... if the window wont stay anywhere, and just keeps falling down after you pull it up and let go ..... you have a real bad spring. cars that have spent more of their life with the windows down seem to weaken the spring the worst from the spring being more compressed more of the time. i would think cars from colder climates would most likely make better donor cars from the windows being up more.
:TU: Thanks for reply. Both of you are probably correct. I'll have a look at it and let you know later. BUT, Today the instrument cluster is going back in after wiring harness change. I just hope I have enough fingers to get it all sorted out. Per. :beer
