Trunk key doesn't work - Chevelle Tech
Troubleshooting Diagnosing problems done here.

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post #1 of 22 (permalink) Old Apr 8th, 19, 5:48 PM Thread Starter
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Trunk key doesn't work

I've read a few threads similar to my problem but they seem old and not sure I understand the best way to do this.

Trunk key fits into lock but won't open it. It moves mechanism a little but evidently not enough. Tried other keys and repeated attempts don't work.

Any suggestions?

Thanks, Ben.

1970 Chevelle SS (clone)
454 cid (496 stroker)
Holley 4 bbl 750 cfm
Muncie M21 (Hurst shifter)
Long tube headers
Tuxedo Black - black interior
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post #2 of 22 (permalink) Old Apr 8th, 19, 5:54 PM
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Re: Trunk key doesn't work

Wiggle the key every which way you can and see what happens. I assume this key used to work? Probably just has gotten too worn down to work properly. If by any slim chance the key is the original and they never knocked out the plug from the hole where the keyring goes, that little plug will have the lock cylinder code and you can have a locksmith cut you a new key from that code. Then, once you get it open, you probably want to have that cylinder updated with new tumblers or buy a whole new lock/key combination.
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post #3 of 22 (permalink) Old Apr 8th, 19, 6:05 PM
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Gene
 
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Re: Trunk key doesn't work

may have to pull the rear seat to unlatch it from behind.

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post #4 of 22 (permalink) Old Apr 8th, 19, 7:40 PM Thread Starter
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Re: Trunk key doesn't work

Thx for response.

I've wiggled it quite a bit, no luck, and afraid it'll break off if i stress it too much. Key did used to work and don't have original key with code on it.

1970 Chevelle SS (clone)
454 cid (496 stroker)
Holley 4 bbl 750 cfm
Muncie M21 (Hurst shifter)
Long tube headers
Tuxedo Black - black interior
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post #5 of 22 (permalink) Old Apr 8th, 19, 7:53 PM
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Hank
 
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Re: Trunk key doesn't work

Spray some WD-40 into the lock and then try it.

71 Malibu, Cottonwood Green, 396 BBC, AutoGear M22W 4 speed, 12 bolt 3:55 posi.
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post #6 of 22 (permalink) Old Apr 8th, 19, 11:22 PM
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Re: Trunk key doesn't work

I use powdered graphite for locks.
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post #7 of 22 (permalink) Old Apr 8th, 19, 11:57 PM
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Brian
 
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Re: Trunk key doesn't work

I use a lubricant called Tri-Flow. It has teflon in it and it works very well. Just hold the key slot open with the key, then spray a small amount in the lock.

https://www.walmart.com/ip/Superior-...20009/19868594
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post #8 of 22 (permalink) Old Apr 9th, 19, 12:05 AM
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Re: Trunk key doesn't work

There's a great product locksmiths use called Tri Flow works like magic. Had my door locks out took them to a locksmith to have them re keyed, luckily I had the key numbers so he made me new keys, drivers side worked great passenger side didn't, he pulled a small can of tri flow from under the counter and sprayed it instantly it worked perfect. Bought a can from him 8.95 for a small can but we'll worth it, when I got home the trunk lock didn't work one shot and it was perfect. WD 40 may work if not in too bad of shape it worked on my drivers side but not the passengers. Never use WD 40 and graphite together you will make mud use one or the other according to the locksmith. Locksmith said passenger side is frozen more often due to lack of use.
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post #9 of 22 (permalink) Old Apr 13th, 19, 1:38 AM Thread Starter
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Re: Trunk key doesn't work

well...wd40 and tri-flow didn't help. Worth the effort but now what do I do?

Can i take the whole mechanism out, or drive it to a locksmith, etc.?

Thanks again for any help.

1970 Chevelle SS (clone)
454 cid (496 stroker)
Holley 4 bbl 750 cfm
Muncie M21 (Hurst shifter)
Long tube headers
Tuxedo Black - black interior
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post #10 of 22 (permalink) Old Apr 13th, 19, 2:24 PM
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Hank
 
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Re: Trunk key doesn't work

Try bottoming out the key and then back it off a smidge and then try turning it.
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post #11 of 22 (permalink) Old Apr 13th, 19, 2:33 PM
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Re: Trunk key doesn't work

just pull the seat, long screw driver pop clip push lock out done
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post #12 of 22 (permalink) Old Apr 13th, 19, 7:47 PM
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Re: Trunk key doesn't work

Try pushing the trunk lid down as you turn the key.
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post #13 of 22 (permalink) Old Apr 13th, 19, 10:05 PM Thread Starter
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Re: Trunk key doesn't work

Quote:
Originally Posted by roadster601 View Post
just pull the seat, long screw driver pop clip push lock out done
lol, love how succinct this is!

1970 Chevelle SS (clone)
454 cid (496 stroker)
Holley 4 bbl 750 cfm
Muncie M21 (Hurst shifter)
Long tube headers
Tuxedo Black - black interior
chevyhawaii is offline  
post #14 of 22 (permalink) Old Apr 13th, 19, 10:25 PM
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Hank
 
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Re: Trunk key doesn't work

I don't know if roadster601 was referring to removing the clip and then pushing the lock out while the trunk is closed but you can't get at the clip unless the trunk is open. I don't know if you can even get your body into the trunk there are no big cutouts to crawl thru.
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post #15 of 22 (permalink) Old Apr 13th, 19, 11:33 PM
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The last classic car I owned had a similar problem, it was a 1963 Beaumont Acaidian SD. I had to drill out the lock, go slow very easy to do. A 3/8” bit just chewed right through it, no other damage, to any sheet metal. Popped what was left of the lock, purchased a new one and done deal
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