Fixing that little rust spot...

Question to the gruppe: I'm looking for knowledge on the parts inside the door. It seems I'm missing parts in my car.

The exploded views from BMW show it #12, at the bottom in the drawing, that seems to be missing in my car on both sides:
View attachment 176293
the associated parts number(s) are

51326746102​

51326746103​

which usually indicate that they are 'handed'; a left and right version possibly exist.
From a purpose perspective, I think they are designed so that the window does not go too high up.

I do have a piece of similar shape, but it is located at the top & inside of the door. It also seems to be different in number of holes, and it clearly not screwed to the window track -bearing block but to the door.
View attachment 176295View attachment 176294


Can anyone confirm if the #12 indeed exists?
Would anybody have a picture of it?
Anyone have 2 for sale?
Erik, those #12 brackets are mounted at the bottom of the sliding mechanism, and seems to me they are a mechanical stop when the window goes all the way down. I am not surprised yours are missing. I have noticed that when removing them your window can go a little lower inside the door. Which I really prefer, because the windows don't totally disappear inside the doors. the little edge that remains out is not comfortable when you're "resting" your elbow on the door.
 
Got the same plastic parts installed and ask myself the same question ?

Breiti
If you are talking about the little white buffers that go on the door catch - I think they do 2 things:
1. They ensure a tad 'earlier' coupling of the door and the door jamb. Thus the mechanism starts to work earlier - as in half a degree of door opening.
2. Once closed I think the plastic part also makes the latch rotate just a degree further, making the train of components that are linked to it just slide&move&rotate a bit more.
 
Fed up of the digging into and remodeling the front structure of the car today, I cleaned up the front axle in prep for sandblasting and Alu-zinc spray + powder coat.

While cleaning the wax, oil and sand with a chisel and rags, I got annoyed by all the weld spatter from factory; it just kept catching my chisel and cleaning rags. So I decided to take the belt sander and grind em all flat. It'll also help in future cleaning it up in spring and fall.

While doing it, cracks appeared around the front towing hooks, a part where other members also have found cracks, so not strange at all.
Surprisingly, the cracks are perfectly identical: one on each towing hook, the crack being located on the outside of the hook, cracking up from below going upwards.
I tried to take some pics and :
20250826_154434.jpg 20250826_154417.jpg
Did it perhaps have to do with the assembly at Karmann? it just to much a coincidence to me.
I guess it up to the sandblaster to have the corners cleaned before welding it up. Any other things to consider?

I'm quite confident they'll be used in the future, so they should be up to the job. Everything on my car is in pieces. I'm sure I'll be messing one or two things up. Getting stranded on the side of the road is a guarantee, so likely getting towed as well...

By the way, anyone know what purpose the C-clip has, mounted on the right side of the subframe?
See pic below, in the middle. REALOEM doesn't show anything in that location when looking at the build diagrams:
1756221367914.png
1756221472536.png

I'm not the only one having it, as the pic above is from a different car (this link:)
 

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Another question: my car had an additional radiator (EDIT 28aug: Should be "Fan" not radiator), as part of the automatic package. The fan shroud is mounted with 2 brackets, one on either side.

Funny enough, the Right one of them seems to have a bend in it.

20210917_151515.jpg


The other (Left) is just an (almost) perfect triangle with straight sides.
I suspect my R bracket got wacked somewhere in it's life, and it should have those straight sides originally like the L side, and not the funny wave it has today. (in pics on the right, with the green tape on it)

Anyone has any pics with the right bracket showing what shape it should have?

I want to be sure i get the shape correct before zinc plating and 2K black paint. Trying to correct it afterwards is a bit shade-tree...
 

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Those hold the fan in front of the condenser, they mounted a fan in an automatic without a/c? In 1974 they added a temp sensor to activate that fan when the radiator was getting too hot. Is yours a 74?
 
Mine is from May 73, swiss delivered.
You mean to say that that radiator is originally only for AC equipped cars?
The car didn't come to me with AC equipment. Can I spot somehow it ever had, from factory?
The fan could have been retrofitted ofcourse, perhaps to prevent over heating, who knows.

I think i have the switch also that you mention, a flat black rectagular box with a silver label on it; it was m mounted on the inner wing.
 
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I'm sure you know I had those same cracks. And also, specifically, cracks related to an oversized anti-sway bar.
20210328_075814.jpg20210328-stress crack 1.jpg20210328-stress crack 2.jpg
I think the clip is to hold the rare and seldom seen bottom cover (under the engine compartment).
 
The front bottom cover was still available from the dealer a couple of years ago. Well, maybe more than a couple. Most disappeared at the dealer with the first or second oil change. Made of a carboard like material, thin and flimsy. Look great, have little functionality that I know of. Perhaps air flow.
 
Mine is from May 73, swiss delivered.
You mean to say that that radiator is originally only for AC equipped cars?
The car didn't come to me with AC equipment. Can I spot somehow it ever had, from factory?
The fan could have been retrofitted ofcourse, perhaps to prevent over heating, who knows.

I think i have the switch also that you mention, a flat black rectagular box with a silver label on it; it was m mounted on the inner wing.
Manual and automatic cars had different radiators whether with a/c or not made no difference. The auto radiator has two cooling lines for the auto trans. In MY 1974 a temp sensor was added to passenger side of either radiator or it might be on the lower hose fitting to activate the fan in front of the radiator. I have only seen this fan when used with an a/c condenser in front of the radiator. Perhaps all 74s had the extra fan even without a/c. Every 74 in the US has a/c.

When you said shroud, that is on the back of the radiator surrounding the water pump fan but only found on 1974 coupes.
 
Maybe that helps?

Breiti
 

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Thanks for the pics @Breiti, but the first pic you have is of the left side, I was looking for a pic of the right side bracket. Would yo happen to have a pic of the Right side as well? Perhaps before disassembly, or during the painting process?

The second pic looks to the bracket of the radiator, not the bracket of the front auxiliary fan.
 
@HB Chris, sorry about my incorrect terminology. I was mixing up 'radiator' and 'Fan' on my side. I corrected some wordings in the posts above.
Indeed my car had this additional fan installed, but no AC parts were installed when I bought the car.
I always assumed that the auxiliary fan was there as a standard equipment as part of being an automatic. Which is also why i couldn't locate them in the Tranmission section in the parts books.

But thanks to you I now understand that they are in fact part of the AC setup.
(Side question is this the part (function) that is often added when talking about the "SPAL" fan?)

Knowing it's an AC part, I could also locate the parts in the RealOem website:
The drawing there seems to depict parts 7 and * as being quite symmetrical, meaning the bend in my right part probably is man-made / self induced in a frontal impact (my car also had a new nose)
1756386118639.png


The 'shroud' that i mentioned was actually part #1 "Blower unit" the cylindrical part that holds the motor of the auxiliary fan; it used the 2 brackets (# 7 is left and #8 ir right) to be mounted directly behind the kidney grille.

The part 17, temperature switch, seems to be the part that you also reference as being std equipment in the US from '74 MY. RealOEM lists it being used from 71 to 73.
I think the part labelled as "A"in the pic is that Temperature switch (at the time i didn't know the functions of these things, so i just labeled them a/b/c :-) :
20210911_234651.jpg
 

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@HB Chris, sorry about my incorrect terminology. I was mixing up 'radiator' and 'Fan' on my side. I corrected some wordings in the posts above.
Indeed my car had this additional fan installed, but no AC parts were installed when I bought the car.
I always assumed that the auxiliary fan was there as a standard equipment as part of being an automatic. Which is also why i couldn't locate them in the Tranmission section in the parts books.

But thanks to you I now understand that they are in fact part of the AC setup.
(Side question is this the part (function) that is often added when talking about the "SPAL" fan?)

Knowing it's an AC part, I could also locate the parts in the RealOem website:
The drawing there seems to depict parts 7 and * as being quite symmetrical, meaning the bend in my right part probably is man-made / self induced in a frontal impact (my car also had a new nose)
View attachment 207604

The 'shroud' that i mentioned was actually part #1 "Blower unit" the cylindrical part that holds the motor of the auxiliary fan; it used the 2 brackets (# 7 is left and #8 ir right) to be mounted directly behind the kidney grille.

The part 17, temperature switch, seems to be the part that you also reference as being std equipment in the US from '74 MY. RealOEM lists it being used from 71 to 73.
I think the part labelled as "A"in the pic is that Temperature switch (at the time i didn't know the functions of these things, so i just labeled them a/b/c :-) :
View attachment 207613
Erik, indeed the Automatic did have the additional fan, same as the AC cars. Mine was a factory-automatic w/o AC and had the same.

Your switch A is a temp switch, it is intended to turn on the additional fan at a certain temperature so prevent overheating:
1756389970219.png
 
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