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E34 (1989 - 1995)

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  #1  
Old 10-06-2012, 10:33 AM
My525iT My525iT is offline
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Mein Auto: 92 525iT Wagon M50
Door locking noise

When I lock the doors from the drivers side with the key (probably the same from the inside), the doors lock and then the drivers side makes a loud grinding sort of noise for a second.

Realoem shows an actuator but Bentley only shows a locking drive assembly.

Need help - thanks.
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  #2  
Old 10-06-2012, 07:20 PM
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BMWFatherFigure BMWFatherFigure is offline
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Mein Auto: E23;E30;E38;E32;E34 +
Take the door trim off; set the catch part of the lock to 'door closed' position and establish exactly what part is making the noise. Go on from there. Always leave another window down to aviod lock outs.
Body computer do smart enough to close windows on lock up.
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  #3  
Old 10-13-2012, 11:10 PM
paperplane94 paperplane94 is offline
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The grinding noise is most definitely from your actuator. There is a plastic gear in it that can get its teeth worn if it slips.

If it works Okay then I wouldn't try to fix it until it breaks, have to have another actuator on hand though. Unfortunately they don't sell the gear separately.

Even if you leave the widows open the double lock mechanism will still keep you out.
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  #4  
Old 10-14-2012, 01:52 AM
turbo_s turbo_s is offline
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Mein Auto: e34 1989
i have the same problem
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  #5  
Old 10-14-2012, 02:02 PM
manuelwindows manuelwindows is offline
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Mein Auto: 1994 530i, 1977 320i
Did this just start happening and didn't happen before? I'm asking because, at least on my 94 530i, is that when you lock the door on the driver's side, there is an extra grinding sound for half a second which I think is normal and it is the gear that locks the deadbolt into place and I think I remember my older 535i making the same noise.

If you lock the doors from the inside, that is, when you are inside the car, it shouldn't make the noise though, because that does not activate the deadbolt. Press the locks down when you are inside the car and see if it makes the same noise and if it does, then I might worry about pulling the door trim.

That's my two cents for what it's worth. Before you start taking the panel off, I'd make sure it's not just the deadbolt doing what it's supposed to do.
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  #6  
Old 10-14-2012, 08:52 PM
My525iT My525iT is offline
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It just started happening about a month ago. Right before I put the car on blocks to work on it so the battery has been disconnected for a few weeks. I think I sat in the car and locked from the inside and still heard the noise.

As per the plastic gear. It reminds me of my old Saturn. The odometer had a plastic gear wheel that wore down. A guy used to rebuild them with a similar part from a hobby store. Might be worth looking into.....
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  #7  
Old 10-14-2012, 10:37 PM
paperplane94 paperplane94 is offline
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See this if you want pics of the mechanism:
http://forums.bimmerforums.com/forum....php?t=1596941
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  #8  
Old 10-15-2012, 05:29 AM
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BMR_LVR BMR_LVR is offline
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Quote:
Originally Posted by paperplane94 View Post
See this if you want pics of the mechanism:
http://forums.bimmerforums.com/forum....php?t=1596941
That was a GREAT write up Paperplane Thanks
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Quote:
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It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold

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  #9  
Old 10-15-2012, 07:11 AM
paperplane94 paperplane94 is offline
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Thank you for the appreciation, sir.
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