Two trunk holes?

[Jbaumshelter]

17 minutes ago, Conserv said:

perhaps you’re referring to foam strictly outside the snorkel tube

Thanks Steve, that is what I was referring to. It was all decayed and covering the holes. You confirmed my suspicions. 

[jgerock]

The 69 had and still has the snorkels. There was and still is some foam padding stuffed into the corners of the inside wheel housings but I don't think enough to block the air. My headliner gets mighty puffed when the windows are down. Bet it would be worse when the roof is cranked open. Believe I have a set of plugs here somewhere.

[bluehills2002]

The orange owners manual has a description and illustration of the “stale air extraction” system (p. 21/fig. 41), noting that it is found “only on vehicles without steel panel sliding roof”.

[02Les]

On ‎7‎/‎26‎/‎2018 at 8:50 AM, Jbaumshelter said:

So I was replacing my rear door cards and decided to give these tubes on my 75 a cleaning. I discovered a bunch of foam packed around them? (Dead and crumbling foam) Has anybody seen that before? Should I replace with new foam or allow them to breath better? I would suspect that was a factory thing as this car was mostly original when I picked it up. 

My '76 Sahara with sunroof (now gone) had this foam.

It was pushed well into the gap; I pulled it out to take a pic. It was quite a sculptured piece of foam.

[jgerock]

6 minutes ago, 02Les said:

My '76 Sahara with sunroof (now gone) had this foam.

It was pushed well into the gap; I pulled it out to take a pic. It was quite a sculptured piece of foam.

My 69 had two different colored foam pieces similar to this one. The BMW Engineers get an "F" grade for the rear sunroof drains.  

[Jbaumshelter]

So that is exactly what I found in my 75. However the foam was placed directly over the "elephant trunk" holes. As Steve said, it is intended to seal the trunk and not cover the holes. I need to make some new ones as mine were decayed and falling apart. 

[jgerock]

So - what about these two holes in the rear seat bulkhead of (I believe) the early cars?

 

And these two symmetrical holes with plastic plugs that are in my 69. What were they for?

The inside of my 73 does not have those little holes and plugs.

The graphic mentioned earlier 

Interior of my 69 without the headliner shows the sunroof frame and the series of holes just above the rear window. The Golde metal frame blocks the airflow behind it to the rest of the headliner.

 

 

Foam stuffing

[jgerock]

Just found this in the February 1976 Roundel Magazine (the rectangular format)

 

I recently replaced the trunk snorkles in my 69 with two plugs.

[fjord-tii]

I believe the non-sunroof models have a panel above the rear window that separates the headliner from the roof and provided a path for the fresh air venting to those plastic tubes. On my ‘72 non-sunroof, the guy that installed the headliner didn’t include this panel (he mostly did British cars) although I’d gone to great effort to find one and the fasteners that go with it. 

[Robert Kyle]

Weird.  My 76 sunroof car doesn't have those trunk holes 

[Conserv]

1 hour ago, Robert Kyle said:

Weird.  My 76 sunroof car doesn't have those trunk holes 

 

Interesting, Robert!

 

VIN and manufacturing date? Two possibilities, at least:

 

1. BMW, nearing the end of '02 production, eliminated the need for plastic plugs on sunroof cars by simply not punching out the oval holes. This would, however, require some additional coordination on the assembly line, so as not to accidentally install un-punched quarter panels on cars without sunroofs!, and

 

2. Your quarter panels are replacements and they came un-punched from the manufacturer.

 

Photos, as I've never seen this before!

 

Below, my non-sunroof ‘76 (VIN 2742541, April 23, 1976) during it’s re-paint. Just to confirm, Robert, you’re talking about the two oval holes?

 

Best regards,

 

Steve

 

 

Edited March 9, 2020 by Conserv

[Lucky 7]

If you’re plugging the holes, a 60x30mm grommet makes a better seal than the factory plugs. For a buck apiece, it’s much cheaper than OEM too. 
 

[John76]

36 minutes ago, Lucky 7 said:

If you’re plugging the holes,

Only plug the holes (if you have them) on a sunroof car.

These holes are cabin vents for the slick-tops. This vent is along the rear edge of the headliner (above the rear window).

[leggomyelko]

This is one of the more fascinating "niche" rabbit holes I found myself exploring...gosh, I love this site and community!

 

If anybody needs a set of "elephant trunk" vent snorkels for a non-sunroof car, I've got a set!

[Zak]

On 8/3/2017 at 2:25 PM, '76mintgrün'02 said:

I mouse-proofed mine, after finding little footprints inside.

If they're determined, they can chew trough that screen.