GTO1966

on my 72 I cant even get the key all the way in the door lock, so I was going to unload some wd40 into it.....question is since wd40 takes adhisives and glue off,... by unloading it into the lock can it and other solvents hurt fiberglass......im also open to other ideas of what to squirt into the lock....Thanks

SteveG75

Forget WD-40. It is not a penetrating lubricant. Try Deep Creep or Kroil. However, don't force the key, you don't want it to break off in the lock.

Chinaski

Powdered Graphite?

Paul L

I agree with graphite. It works at -30*F.

oldgto

My fater-in-law used to be a locksmith. He says NEVER use WD40 on locks. Graphite is what you need.
And... I see a 1966 GTO for a screen name? Cool! (see signature line)

Duntov

One of the locks on the house was really stiff. I sprayed some Hornady One Shot dry lube in, and it's been smooth as a hot knife through butter for the past year. It goes on wet but dries to a film. Should be able to get it from Amazon or some sporting good stores that sell firearms. I got the last can at Cabela's. Just a suggestion.

marshal135

Definitely Graphite.
My drivers door lock on my 68 was so stiff I thought I was going to snap the key off.
I pulled it out not a fun job on a 68.
I took it to an old skool lock shop.
He got it all fixed up.
There was so much white build up internally like on a plumbing fixture.
He said graphite only.
Marshal

BLUE1972

Lock Ease (any brand)

WD has a preservative for metal - wax. It will gum up the internals of the lock.

Just be careful as the lock ease may drip out and stain the paint. Keep a rag handy to clean any drips.

74Ken

Worse case scenario you change your door locks.

When I got my car, it only came with 1 key, I ordered a new lock set for cheap and installed it myself...wasn't really that hard, but I did have to have my daughter get her small hands in there to hook up the linkage. Just take pictures from inside the door before removing the linkage.

It took me less than 1/2 hour, most of it was trying to get my fat fingers inside to hold the linkage.

The13Bats

I haven't touched wd40 in like 30 years, i also have other hobbies like rc and restoring old vintage arcade machines, wd40 is nasty, it attracts dust and becomes sticky,
Too many better products, plus never spray oil type stuff on any fiberglass, get that lock full, runs or overspray on inside of door i never seen it happen but would fear it could get into the fiberglass