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Torsion beam cover fixings


jamesmckenzie

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Hello,

 

My car has been in pieces a while and now that the bodywork is complete - I am into re-assembly. There are 2 fixings I've misplaced and cannot find them in the parts manuals. Do you lot know the part numbers or can you tell me the screw type? 

Many thanks,

 

image.png

 

image.png

 

James

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Might just be me, but I can only see placeholders, not the photos

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Sorry, can't help with the later models and I'm sure someone will be along in a minute.  However, most of this type of fixing is usually by hex head self-tapping screw into a speed nut.

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Hi James, as Peter says it's probably a self-tappping screw. I got to put my spring covers back on this week, when I took them off I think (hope) I put the screws in the the same bag I put the cover plates in. I'll check tonight.

Do you have the sealing strip?

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36 minutes ago, TargaWayne said:

Hi James, as Peter says it's probably a self-tappping screw. I got to put my spring covers back on this week, when I took them off I think (hope) I put the screws in the the same bag I put the cover plates in. I'll check tonight.

Do you have the sealing strip?

Wayne you legend, If you've got an image with basic dimensions, that would be fab. I don't want to drive the wrong size self tapper into my freshly painted bodywork. Also, what are you planning on doing to prevent rust starting around this location as the self tapper takes the paintwork off as it goes in?

Best,

James

1 hour ago, PeterK said:

Sorry, can't help with the later models and I'm sure someone will be along in a minute.  However, most of this type of fixing is usually by hex head self-tapping screw into a speed nut.

Thanks Peter

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1 hour ago, Leicestershire said:

 

I would recommend a zinc based coated screw over stainless. 

Out of interest why? Is it because the zinc would be sacrificial?

Any fixing like this I replace with stainless as I go along. I also flood the area with dinitrol before and after fixing and then clean up the visible parts after that. This has worked well for me so far.

Edited by Roy M
Predictive text!!
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1 hour ago, Leicestershire said:

Self tapping screw.

Try one of the screws from the rear bumper trim pieces for size.

I would recommend a zinc based coated screw over stainless. 

Thanks very much

34 minutes ago, Roy M said:

Out of interest why? Is it because the zinc would be sacrificial?

Any fixing like this I replace with stainless as I go along. I also flood the area with dinitrol before and after fixing and then clean up the visible parts after that. This has worked well for me so far.

Good idea, thanks for the dinitrol idea. Just need a picture and some dimensions now.

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4 hours ago, Roy M said:

Out of interest why? Is it because the zinc would be sacrificial?

Any fixing like this I replace with stainless as I go along. I also flood the area with dinitrol before and after fixing and then clean up the visible parts after that. This has worked well for me so far.

You get galvanic corrosion between steel/ stainless steel, weakening the standard steel part.

It's only slight and dinitrol will minimise the risk but it's good practice to avoid if possible.

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OK I had a look I didn't put the screws in with the cover plates 😞 . But I think there is a reason for that. I offered up both the cover plate and the outer sill (Trim Cover), the holes in the sill line up with the holes in the body and cover plate. So the outer sill (Trim Cover) screws hold both the sill and the cover plate. 

Unfortunately, the screws in my sill aren't original But I have found the Katalog page for the Outer sill (Trim Cover) 12 and 13. The quantity says 10 e.g. 5 per side, but my sill has 6 holes. But It's the diameter that's important.
    

900 143 031 02 Oval-Head sheetmetal screw B 4,2 X 9,5 
900 025 032 02 washer 4,3 

This is best I can do.
 

Cover plate.jpg

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14 minutes ago, Roy M said:

Isn't 4.2 the diameter?   Or am I missing something?

Yes, That's what I said, Or am I missing something? 😄 

On the 915 cars they had a round torsion bar cover held in from the back. The Outer sill (Trim) had 5 screws per side. The later G50 had the bigger cover plate and they put an extra hole in the sill to hold it in. So you need 6 screws per side.  Hence 12  4.2x9.5 screws in total. 
Bloody lazy Germans didn't update the Katalog. 

   

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