C3 door lock jammed Help please - CorvetteForum - Chevrolet Corvette Forum Discussion


C3 General
General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

C3 door lock jammed Help please

Reply
 
 
 
Thread Tools Search this Thread
Old 08-15-2007, 02:56 PM   #1
sbibeau
Junior Member
Thread Starter
 
Member Since: Sep 2004
Location: Sandown NH
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Default C3 door lock jammed Help please

Hi All,
I know there has been discussion on this before but most people have found just dirt to be the problem.
My lock mechanisim will not move to the fully unlocked position.
It moves about 3/4 of the way and stops. I tried pushing on the mechanism with a rod and its for sure hiting a dead end. I even hit the rod with a hammer. Its Stuck.... I removed the link to the inside lock **** to eliminate that. I cleaned and oiled the latch mechanism. it appears clean and free but it wont go to the full unlocked position.

Any advice is appreciated.
sbibeau is offline   Reply With Quote
Old 08-15-2007, 03:24 PM   #2
SIXFOOTER
CF Senior Member
Support Corvetteforum!
 
SIXFOOTER's Avatar
 
Member Since: Jan 2006
Location: Boca Raton Florida
Posts: 9,192
Thanks: 0
Thanked 11 Times in 10 Posts
Default

Be very careful with the hammer, you can end up jamming the thig permanantly. Spray it full of some kind of liquid lube, PB Blaster is a good one. Wiggle the lock rod back and forth and try the latch.
If that does not get you unlocked, you need to remove the seat and the door panel, spray it down some more and use a screwdriver to lift the lock rod on the latch
SIXFOOTER is offline   Reply With Quote
Old 08-15-2007, 03:42 PM   #3
1Z87L8
CF Senior Member
 
1Z87L8's Avatar
 
Member Since: Nov 2005
Posts: 1,795
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by sbibeau View Post
Hi All,
I know there has been discussion on this before but most people have found just dirt to be the problem.
My lock mechanisim will not move to the fully unlocked position.
It moves about 3/4 of the way and stops. I tried pushing on the mechanism with a rod and its for sure hiting a dead end. I even hit the rod with a hammer. Its Stuck.... I removed the link to the inside lock **** to eliminate that. I cleaned and oiled the latch mechanism. it appears clean and free but it wont go to the full unlocked position.

Any advice is appreciated.
power door locks? if so a bad actuator can cause
this.
1Z87L8 is offline   Reply With Quote
Old 08-15-2007, 04:46 PM   #4
Easy Mike
CF Senior Member
Support Corvetteforum!
Cruise-In II Veteran
 
Easy Mike's Avatar
 
Member Since: Jun 2000
Location: The Bluegrass State
Posts: 34,974
Thanks: 0
Thanked 587 Times in 539 Posts
Default

Lock or latch? Door won't open (latch) or it will not lock/unlock?

Easy Mike is offline   Reply With Quote
Old 08-18-2007, 10:36 AM   #5
sbibeau
Junior Member
Thread Starter
 
Member Since: Sep 2004
Location: Sandown NH
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Default Door lock wont unlock :(

Hi and thanks for the responses.
I am going to try to get the door panel off today.
to answer the questions asked so far.
1) it is a manual door lock.
2) I did hit it with a hammer but not that hard.... OOPS
3) It sure looks like the Lock mechanism thats jammed cause the one on the other side can move a greater distance than the jammed one.
Please if you have any other ideas I would like to hear as I am not successful yet.
OH is there anyway to remove the actual PIN the pin that the door latch connects to?? not sure what that pin is called. its the large post the latch grabs.
thanks again
sbibeau is offline   Reply With Quote
Old 08-18-2007, 11:20 AM   #6
DARROW
CF Senior Member
 
DARROW's Avatar
 
Member Since: Mar 2006
Location: SAN CLEMENTE CALIFORNIA
Posts: 454
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Fill out your profile you might have someone living in your area that knows that car.....And would be glad to help.
DARROW is offline   Reply With Quote
Old 09-09-2007, 06:51 PM   #7
pwsusi
CF Senior Member
 
pwsusi's Avatar
 
Member Since: Aug 2006
Location: Grafton MA
Posts: 630
Thanked 0 Times in 0 Posts
Default

I'm having the same problem with my 71. It moves about 3/4 of the way and stops before unlocking. I took the door panel off and after some poking around with a screw driver the door unlocked. After doing that with the screw driver I can now lock and unlock the door (not sure what I did to help the situation). However when i go to unlock it still sticks a little and I'm afraid it's going to get stuck again. I sprayed some WD40 in there when the door panel was off and that didn't seem to do much. Anything else I can try to fix this....or do i need to purchase a new door lock latch assembly?



Thanks,
Paul
pwsusi is offline   Reply With Quote
Old 04-01-2008, 04:16 PM   #8
carpinteriac3
CF Member
 
Member Since: Feb 2008
Location: Carpinteria CA
Posts: 57
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Bump!

I'm having the same problem with my '77 - the latch itself has jammed closed, and now can't be opened. In my case, something may have snapped or come loose inside the locking mechanism, as the usual process of lube/wait/play around with a screwdriver won't work.

If anyone knows a way I can undo this sucker, I'd love to know. Otherwise I'm going to just have at it with a dremel and cut the latch...
carpinteriac3 is offline   Reply With Quote
Old 04-01-2008, 05:16 PM   #9
stingr69
CF Senior Member
 
stingr69's Avatar
 
Member Since: Mar 2004
Location: Little Rock AR
Posts: 3,508
Thanks: 0
Thanked 8 Times in 8 Posts
Default

If you just give up on opening the mechanisim, you can pull the drivers seat out, pull off the door panel for better access and use a hacksaw blade from inside the passenger compartment to chop off the striker post. No paint damage if you are reasonably careful. The striker is cheap and easy to replace.

Once you do get the door open you will want to clean out the old grease and dirt from the mechanisim. That is the culprit here. This is a common problem with these old cars.

-Mark.
stingr69 is offline   Reply With Quote
Old 04-01-2008, 06:18 PM   #10
LSH77VETTE
CF Senior Member
 
LSH77VETTE's Avatar
 
Member Since: Feb 2008
Location: Madisonville Kentucky
Posts: 358
Thanked 3 Times in 3 Posts
Default

Quote:
Originally Posted by sbibeau View Post
Hi All,
I know there has been discussion on this before but most people have found just dirt to be the problem.
My lock mechanisim will not move to the fully unlocked position.
It moves about 3/4 of the way and stops. I tried pushing on the mechanism with a rod and its for sure hiting a dead end. I even hit the rod with a hammer. Its Stuck.... I removed the link to the inside lock **** to eliminate that. I cleaned and oiled the latch mechanism. it appears clean and free but it wont go to the full unlocked position.

Any advice is appreciated.
I had the same thing happen to my son's 1975. What I found to be the problem was that the rod that runs from the exterior door handle to the latch needed to be adjusted. What happens is when the rod from the exterior door handle is not just right, and it puts a little pressure onthe latch, it will not let the door lock operate properly. It will also cause the door to not open after it is shut sometimes. Try pulling the door panel off and disconnecting the rod that runs to the exterior door handle. Once you have it loose, try operating the door lock and I'll bet you will find that it works properly. If that's the case, then all you have to do is get the rod that runs to the exterior door lock adjusted properly. I would suggest getting everything adjusted and put back together and try it a few times before you put the door panel back on just in case it locks up on you and won't open. It is much easier to actuate the door lock mechanism to open the door when the panel is not on the interior of the door. Good luck and let us know how it goes.
LSH77VETTE is offline   Reply With Quote
The Following User Says Thank You to LSH77VETTE For This Useful Post:
'Bochawa72 (11-28-2015)
Old 04-01-2008, 06:25 PM   #11
carpinteriac3
CF Member
 
Member Since: Feb 2008
Location: Carpinteria CA
Posts: 57
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I think that's the way to go. The doors on this thing are a rusted horror - Bubba left it sitting with the windows open for a few months, then stripped the thing for whatever he needed to fix something else. Each door is missing assorted panels, struts, and so on, and they're rusty and dirty as hell. I'm probably going to have to do a major rebuild anyway...



Quote:
Originally Posted by stingr69 View Post
If you just give up on opening the mechanisim, you can pull the drivers seat out, pull off the door panel for better access and use a hacksaw blade from inside the passenger compartment to chop off the striker post. No paint damage if you are reasonably careful. The striker is cheap and easy to replace.

Once you do get the door open you will want to clean out the old grease and dirt from the mechanisim. That is the culprit here. This is a common problem with these old cars.

-Mark.
carpinteriac3 is offline   Reply With Quote
Old 04-01-2008, 10:42 PM   #12
'75
CF Senior Member
 
'75's Avatar
 
Member Since: Dec 2007
Location: McHenry Illinois
Posts: 5,397
Thanked 241 Times in 231 Posts
Default

Quote:
Originally Posted by LSH77VETTE View Post
I had the same thing happen to my son's 1975. What I found to be the problem was that the rod that runs from the exterior door handle to the latch needed to be adjusted. What happens is when the rod from the exterior door handle is not just right, and it puts a little pressure onthe latch, it will not let the door lock operate properly. It will also cause the door to not open after it is shut sometimes. Try pulling the door panel off and disconnecting the rod that runs to the exterior door handle. Once you have it loose, try operating the door lock and I'll bet you will find that it works properly. If that's the case, then all you have to do is get the rod that runs to the exterior door lock adjusted properly. I would suggest getting everything adjusted and put back together and try it a few times before you put the door panel back on just in case it locks up on you and won't open. It is much easier to actuate the door lock mechanism to open the door when the panel is not on the interior of the door. Good luck and let us know how it goes.

This same thing happened to mine. Same fix.
'75 is offline   Reply With Quote
Old 04-02-2008, 12:39 PM   #13
68/70Vette
CF Senior Member
 
Member Since: Jul 2004
Location: Torrance California
Posts: 21,222
Thanked 9 Times in 7 Posts
Default

First of all, buy a new latch mechanism, or while your at it buy two, one for each door. (The internal levers in the mechanism are stamped steel, about 0.070 inches thick. The levers can get bent easily. Also, the levers rotate on shafts that have no realbearing surfaces. Dirt will eventually grind the clearances apart, creating some slight jambing that means with some forceful use of the unlock or door open levers will cause them to bend and jamb completely.)

A long time ago, there was a posting showing photos of how you could insert a screw driver into the old latch and make it unlock. With the window rolled down, the window slot opening makes it possible to insert a long thin screwdriver into the latch mechanism. If you buy a new latch, you can hold it in your hand and manually activate the locking and opening mechanisms. You'll be able to see which lever it is you have to push to open with a screwdriver. Also...to get my locked shut door open, I opened the other door, removed the inside panel and could see this latch. I practiced on the good door to learn how to use the screwdriver to open it and then used the same technique on the locked door. I took about 10 minutes of probing to get it open.
68/70Vette is offline   Reply With Quote
Old 04-03-2008, 11:06 PM   #14
Doinit Once
CF Senior Member
Support Corvetteforum!
 
Doinit Once's Avatar
 
Member Since: May 2003
Location: Lake Geneva WI
Posts: 128
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I'm with LSH77vette and AKTbird; My drivers door (75 coupe) would lock but not unlock. Took everything out, cleaned it ,oiled it, examined it and put it back together. Still got locked out or in, depending on which side of the door I was on. Started playing with the rod adjustments and ended up shortening the stroke on the outside opening handle and magically the problem went away. I was ready to buy a new latch assembly; glad I didn't.
Mike
Doinit Once is offline   Reply With Quote
Old 08-17-2008, 09:04 PM   #15
hawaii75stingray
Junior Member
 
Member Since: Jun 2002
Location: Kailua HI
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Default

This has happened to me several times.

To prevent the problem, when turning the lock **** to lock if you feel a bit of an abrupt resistance, then unlock the **** and lock it again until it locks smoothly before you shut the door.

If you find yourself locked in and the **** won't unlock beyond about 3/4 of the normal twist, then try pulling sharply on the inside door handle (as if opening the door) while simultaneously trying to twist the **** to unlock. Eventually it will unlock.
hawaii75stingray is offline   Reply With Quote
Old 08-18-2008, 03:52 AM   #16
carpinteriac3
CF Member
 
Member Since: Feb 2008
Location: Carpinteria CA
Posts: 57
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Update :

The passenger side lock came free after a lot of time, patience, and WD-40, but the driver side was completely seized up. In the end I just pulled off the door pad (literally pulled it off - it was rotted so bad only the trim was holding it together), then used a cold chisel to smack down the release tab on the lock.

New locks in place, lubricated, working perfectly.
carpinteriac3 is offline   Reply With Quote
Old 05-16-2012, 09:42 AM   #17
kdvector
Junior Member
 
Member Since: Apr 2012
Location: Kansas City MO
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Default

You were exactly right. I had this problem and could not come up with anything...you were a life saver...thanks for sharing!




Quote:
Originally Posted by hawaii75stingray View Post
This has happened to me several times.

To prevent the problem, when turning the lock **** to lock if you feel a bit of an abrupt resistance, then unlock the **** and lock it again until it locks smoothly before you shut the door.

If you find yourself locked in and the **** won't unlock beyond about 3/4 of the normal twist, then try pulling sharply on the inside door handle (as if opening the door) while simultaneously trying to twist the **** to unlock. Eventually it will unlock.
kdvector is offline   Reply With Quote
Old 05-16-2012, 11:55 AM   #18
69 Chevy
CF Senior Member
 
Member Since: Aug 2008
Location: Lehigh county Pennsylvania
Posts: 2,200
Thanks: 0
Thanked 2 Times in 2 Posts
Default

Quote:
Originally Posted by kdvector View Post
You were exactly right. I had this problem and could not come up with anything...you were a life saver...thanks for sharing!
Shame, shame kdvector for dredging up this 3+ year old thread. You must not have known, like me, that doing so is against the forum rules.
69 Chevy is offline   Reply With Quote
Old 06-08-2014, 02:35 PM   #19
cwasia
Junior Member
 
Member Since: Jun 2014
Posts: 1
Thanks: 0
Thanked 1 Time in 1 Post
Default Spot On!!!

Quote:
Originally Posted by LSH77VETTE View Post
I had the same thing happen to my son's 1975. What I found to be the problem was that the rod that runs from the exterior door handle to the latch needed to be adjusted. What happens is when the rod from the exterior door handle is not just right, and it puts a little pressure onthe latch, it will not let the door lock operate properly. It will also cause the door to not open after it is shut sometimes. Try pulling the door panel off and disconnecting the rod that runs to the exterior door handle. Once you have it loose, try operating the door lock and I'll bet you will find that it works properly. If that's the case, then all you have to do is get the rod that runs to the exterior door lock adjusted properly. I would suggest getting everything adjusted and put back together and try it a few times before you put the door panel back on just in case it locks up on you and won't open. It is much easier to actuate the door lock mechanism to open the door when the panel is not on the interior of the door. Good luck and let us know how it goes.
I had the same problem on my 75. Thanks for your account because it was spot on! The exterior handle rod needs to be adjusted to be almost too long otherwise the lock mechanism will not function properly once everything is tightened. Every time the lock would work fine until I tightened the latch mechanism to the door frame. Once tightened, the rod from the exterior handle would then put a little pressure (almost unperceivable) on the latch mechanism causing it to not work. Give the exterior handle rod a couple twists to lengthen it and bingo - Works perfectly!

Thanks Again!
Cwasia
cwasia is offline   Reply With Quote
The Following User Says Thank You to cwasia For This Useful Post:
'Bochawa72 (11-28-2015)
Old 06-08-2014, 09:39 PM   #20
SIXFOOTER
CF Senior Member
Support Corvetteforum!
 
SIXFOOTER's Avatar
 
Member Since: Jan 2006
Location: Boca Raton Florida
Posts: 9,192
Thanks: 0
Thanked 11 Times in 10 Posts
Default

Wow, yet another ancient blast from the past.
Decent thread and good info
SIXFOOTER is offline   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • C3 door lock jammed Help please
  •  
     
    Reply

    Related Topics
    Thread Thread Starter Forum Replies Last Post
    1981 Power door lock issue shaun8484 C3 Tech/Performance 10 03-02-2017 06:51 PM
    driver door won't open - shop recomendation north central florida JONLF C3 General 10 01-11-2017 06:23 PM
    Drivers door not latching ? Van5150 C5 Tech 0 01-06-2017 11:30 PM
    How do I remove the ^%#$% Spring clips? ironheadvette C1 & C2 Corvettes 4 07-21-2016 08:58 PM
    2005 Center Console Lock Issue 70454 C6 Corvette General Discussion 36 01-08-2016 02:11 PM


    Tags
    1975, 71, 75, corvette, door, drivers, handle, jammed, key, latch, lock, open, replace, side, vette, wontwork, work

    Thread Tools Search this Thread
    Search this Thread:

    Click for Advanced Search

    Posting Rules
    You may not post new threads
    You may not post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are Off
    Pingbacks are Off
    Refbacks are Off

    Forum Jump

    Sponsored Ads
    Vendor Directory

    All times are GMT -4. The time now is 10:15 AM.


    We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
     
    • Ask a Question
      Get answers from community experts
    Question Title:
    Description:
    Your question will be posted in: