Does anyone know how to change both door lock cylinders.

Both my 86 and my wife's 86 passenger door locks don't work.

Hopefully someone has pictures as the procedure goes along.

Thanking anyone in advance

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85 GT 4sp black
86 SE auto black
86 SE auto grey with mustang scoop

Questions.....

When you say they don't work what do you mean?

Is it hard to turn the key in the lock to the point you think the key will break off or are the actual lock cylinders siezed up and they don't turn at all?

Are both driver and passenger doors the same?

Do you have power locks, if so how do they work?

LMK

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Where will the road take you today?

Both, (two cars), the passenger's door locks are seized. I can put the key in the lock but it won't turn to unlock the door. I've tried lubing the inside of the cylinders but to no avail. Since my wife has been complaining about it for two years, I sent away for a pair of door locks from the Fiero Store, (great place). I figured I could put them in myself.

They both do not have power door locks.

I went to a GM dealer and they wanted $200.00 because they say the door skin has to come off. I thought I could do it by taking the inside panel off and working from there.

Thanks.

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85 GT 4sp black
86 SE auto black
86 SE auto grey with mustang scoop

quote Originally posted by FIEROFITZ: I went to a GM dealer and they wanted $200.00 because they say the door skin has to come off. I thought I could do it by taking the inside panel off and working from there. Thanks.

The door skin doesn't need to be removed to accomplish the task. Small hands help, keep band-aids handy to stop leaks! (not really that bad)

It has been my experience with several doors that a hard to turn key is related to the latch mechanism.

You end up trying to turn the key against a dirty/rusty or gummed up latch mechnism.

If you remove the inner door panel...use the below thread for help...
https://www.fiero.nl/forum/Archives/Archive-000001/HTML/20030819-2-028780.html
...you will be able to access the latch mechanism and the lock cylinder.

When you get into the door, disconnect the rod from the back of the door lock cylinder and then try the key, if it now turns easily I would put my money on the dirty latch mechanism.

If you remove the latch mechanism, (rods on the inside and 3 torx screws on the outside), clean all the old grease and dirt buildup off and regrease it, you will be able to tell the difference in how easy it works compaired to when it was dirty.

I also took the rod off that runs from the inside door handle back to the latch mechanism, the area where it runs through the plastic guide I cleaned with a scotch brite pad to smooth off the roughness, a little grease in the guide and reinstall the rod.

The trouble with the doors is they are not weather tight and water and road dust get in and really gum things up.

If that's not the whole problem changing the lock cylinder out is the next step.

It's not the easiest because of the tight area you have to reach into, like indiana_resto_guy said, small hands help.

There is a c-clip that slides away from the cylinder, it's a pain to remove and replace because it's a tight fit.

I recall using a small channel lock and needle nose vise grips, some screwdrivers and alot of really fowl language directed towards the GM engineers.

Take it slow and you'll get it. LMK if you need any pics of specific areas and I'll see what I can do.

[This message has been edited by fierohoho (edited 01-24-2004).]

i'll get a pic up of that nastly little clip, they are a pain to work with, and you may break them if you dont know how they are suppose to work.