'72 window regulator spring installation??
Thread Starter
Race Director
Joined: Oct 2005
Posts: 12,464
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
'72 window regulator spring installation??
Assy manual does not cover this at all, that I can see.
To install a new coil spring, I am going to assume with the regulator in its full extended (up) position, the spring is installed.
The question is,and I haven't taken the regulator out yet,( that is the next project), does the spring get any preload like maybe one turn, before hooking it over the tab?
Thanks,
Doug
To install a new coil spring, I am going to assume with the regulator in its full extended (up) position, the spring is installed.
The question is,and I haven't taken the regulator out yet,( that is the next project), does the spring get any preload like maybe one turn, before hooking it over the tab?
Thanks,
Doug
Le Mans Master
Joined: Aug 2006
Posts: 7,411
Likes: 1,547
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
This may or may not help...
This is a picture of the spring installed on the drivers side.
The spring has the least tension with the regulator extended and the window up.
The spring has the least tension with the regulator extended and the window up.
Thread Starter
Race Director
Joined: Oct 2005
Posts: 12,464
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
Now this is where it gets interesting.
I am working on teh passenger side, teh window has always been real slow going up,a nd lightning fast coming down, so i ssumed teh spring was broken.
it isn't.
The spring is rustly, like it is real old, but it seems installed backwards to me.
In other words, the coil gets tighter as the window is raised,and looser as the window is lowered.
Even with the regulator laying on a bench, it is slow to raise, and fast to go to lowest position.
The spring has a lot of tension on it, even in its most relaxed position.
Thoughts?
I can take a pic, maybe I will and post it in a few minutes.
Doug
I am working on teh passenger side, teh window has always been real slow going up,a nd lightning fast coming down, so i ssumed teh spring was broken.
it isn't.
The spring is rustly, like it is real old, but it seems installed backwards to me.
In other words, the coil gets tighter as the window is raised,and looser as the window is lowered.
Even with the regulator laying on a bench, it is slow to raise, and fast to go to lowest position.
The spring has a lot of tension on it, even in its most relaxed position.
Thoughts?
I can take a pic, maybe I will and post it in a few minutes.
Doug
Thread Starter
Race Director
Joined: Oct 2005
Posts: 12,464
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
Pass side, lowered postion, looking at it as it would approx be mounted in the car.
It that spring backwards?
Thanks,
Doug
It that spring backwards?
Thanks,
Doug
Last edited by AZDoug; Feb 5, 2012 at 05:06 PM.
Thread Starter
Race Director
Joined: Oct 2005
Posts: 12,464
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
Well, i can see your spring is installed opposite from mine. The spring tab on mine was pointing down, the spring tab on yours points up.
I will put the new spring in correctly.
Fussing with it, by taking the lifting arm about 3/4 of a turn past full up, I can get the spring on, and that preloads the spring about 3/4 of a turn when the window is in full up when I pull the arm back down to engage the sector with the motor spur gear.
Thanks,
Doug
I will put the new spring in correctly.
Fussing with it, by taking the lifting arm about 3/4 of a turn past full up, I can get the spring on, and that preloads the spring about 3/4 of a turn when the window is in full up when I pull the arm back down to engage the sector with the motor spur gear.
Thanks,
Doug
Thread Starter
Race Director
Joined: Oct 2005
Posts: 12,464
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
The window works a lot better with the spring installed the correct way.
I had to guess on the preload, but think i got it right.
Dunno if some PO, or mechanic somehow managed to get the spring in backwards at one time, or it came this way from the factory.
The old spring was real rusty, it wasn't something replaced in the past 10 or 20 years IMO.
Doug
I had to guess on the preload, but think i got it right.
Dunno if some PO, or mechanic somehow managed to get the spring in backwards at one time, or it came this way from the factory.
The old spring was real rusty, it wasn't something replaced in the past 10 or 20 years IMO.
Doug
Cruising
Joined: Dec 2013
Posts: 13
Likes: 0
From: Blossom Texas
degrees of loading
Doug,
I know this is an old post but I am now trying to accomplish the same thing. As everyone else has noted, the service manual is silent on this issue. How many degrees of loading is required for each side? Stated another way, I reason that the spring will have the least amount of tension when the window is up, so installing the spring with the regulator extended in the up position will have how many degrees of turn?
I know this is an old post but I am now trying to accomplish the same thing. As everyone else has noted, the service manual is silent on this issue. How many degrees of loading is required for each side? Stated another way, I reason that the spring will have the least amount of tension when the window is up, so installing the spring with the regulator extended in the up position will have how many degrees of turn?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
