Targa bar rear seal questions

sballard · 01-30-2017, 03:44 PM

I will soon be installing my rear targa bar seal.

I cannot find the part number in the online catalog for the plastic rivets that fit in the two holes on either side of the main metal mount seen in the photo. Does anyone know what the part number is for these rivets?

I also am curious if the stainless targa bar cover needs to be installed before the seals are glued into place. I ask because there are 15 holes along the front edge of the cover that align with screw holes in the targa bar channel. If I install these screws for the cover, it will have to be before the seal is glued in, which will cover up the screw heads. When I bought the car, these screws were not installed. The cover was bolted on using just the long bolts that are welded to the bottom ends of the targa cover, which go through the rear fenders. I hate to think that I will need to bugger up an expensive seal if I ever need to take the bar cover off.

Ayles · 01-30-2017, 04:16 PM

Funny you mention it! I just added the part numbers to another thread.

There are three. What you are missing in addition to the plastic rivets is a rubber seal that gets glued around the alignment post. It's basically a square of rubber.

Here are the part numbers for the seal:
901-565-361-40-OEM

And the rivets (two different parts):
999-591-384-40-OEM
and
999-703-186-40-M100

You will want to screw in the bar before installing the seal. The screws are fairly small and not very long. I will take a look at my parts stash to see if can find a similar fastener in my collection.

RSTarga · 01-30-2017, 04:44 PM

I bought the rivets here on Pelican. Make yourself a tool for installation. Just a short awl with a welded thick washer so that the pressure goes on the outside of the rivets.

sballard · 01-30-2017, 07:15 PM

Fantastic! Thanks a million!

sballard · 01-31-2017, 06:50 AM

Another question:

When I install the Targa bar seal, do I apply the adhesive to just the bottom of the seal or do I also need to apply it to the sides facing the targa bar and/or front? Should I use 3M yellow or 3M black sealant? I've read that the sealant needs to be started at the midpoint at the top of the bar and go to one corner and the top fitted for a while to seat the seal. Then remove the top, and do the other side the same. Then seal the side strips. Is this correct?

sballard · 01-31-2017, 10:41 AM

And one more...

I noticed that the targa bar cover vent has residue from some sort of foam covering in the past. I assume that this is something similar to a foam A/C filter that just gets glued in.

RSTarga · 01-31-2017, 11:55 AM

Use closed cell foam so it does not hold water

Ayles · 01-31-2017, 12:26 PM

When I took mine apart there was nothing there that resembles a filter.

ROW911SC · 01-31-2017, 12:32 PM

Quote:

Originally Posted by Ayles

Funny you mention it! I just added the part numbers to another thread.

There are three. What you are missing in addition to the plastic rivets is a rubber seal that gets glued around the alignment post. It's basically a square of rubber.

Here are the part numbers for the seal:
901-565-361-40-OEM

And the rivets (two different parts):
999-591-384-40-OEM
and
999-703-186-40-M100

You will want to screw in the bar before installing the seal. The screws are fairly small and not very long. I will take a look at my parts stash to see if can find a similar fastener in my collection.

Does the square rubber seal go behind the Targa bar? To prevent it from getting crushed? Can you post a pic? Thanks!

sballard · 01-31-2017, 01:18 PM

LenS:

I still have the rubber square on the other side of the bar. It appears to be glued to the targa bar surface although I don't know what the adhesive is. I expect it seals out water from leaking into the bar.

Ayles · 01-31-2017, 01:58 PM

I used a light smear of 3m black on the rubber gasket.

ROW911SC · 02-01-2017, 04:44 AM

Quote:

Originally Posted by sballard

LenS:

I still have the rubber square on the other side of the bar. It appears to be glued to the targa bar surface although I don't know what the adhesive is. I expect it seals out water from leaking into the bar.

OK, yes, I have that "tape" in place. Thanks Steve!

jrsully · 02-01-2017, 01:42 PM

On the Targa Bar (Stainless cover) vent seal, where would one get some "closed cell foam".? and does anybody have an order to install everything. ie: Cover screwed down, seal, then rivets etc.?

jrsully · 02-01-2017, 01:45 PM

another question, was there felt strips along both front and back "top corners" on the main bar itself or just on the rear of the bar itself.? My 71 seems to just have the felt strips along the top rear corners of the bar itself.? Any help appreciated here

SpyderMike · 02-01-2017, 06:14 PM

Check out some of my pictures here...maybe they will help:

Replacing vinyl in 1985 Targa

I don't recall there being closed cell foam over the vent on the removed targa cover. Have you checked the PET to see if it shows some? The foam on the inner targa cover that you replace the vinyl on is doubled over to the outside and glued. It becomes is a cushion around the edges of the vent hole between the two surfaces. You could just be seeing transfer wear of the foam.

I have owned my car since 1989 and was the second owner and the first to restore this part of the car. I could be wrong though...

SpyderMike · 02-01-2017, 06:20 PM

As for the felt strips you can see pics of what I replaced them with here starting page 2:

so this is how a backdate project starts...

there are more detail shots of the vinyl replace on pages 3 or 4.

sballard · 02-01-2017, 06:25 PM

I've order the seal and plastic rivets. Pelican has the rivets but the seal needed to be ordered from Germany (3-5 weeks delivery time). The notice came with a disturbing statement that Porsche has decided to ship fewer parts for the older Porsches to the US, so this will likely affect more and more of our parts in the near future.

My targa bar has a felt strip that goes across the top of the rear portion of the bar. The front part of the bar doesn't have any felt, but there are remnants of adhesive there so I am guessing that felt was also there at some point.

I am going on a search tomorrow for closed cell foam at local hardware stores.

Ayles · 02-01-2017, 07:47 PM

I used the same type of closed cel foam there as well. I think it was sold as 1/8 inch landau foam.

SpyderMike · 02-01-2017, 09:59 PM

I think it is good to run the two strips of felt/foam to keep the metal pieces from rubbing against each other.

sballard · 02-02-2017, 11:51 AM

I've looked at this "vent" in the targa bar again and I think that it is not an air vent. I think that it is a device for routing rain water that passes through the stainless cover louvers into the drain hole between the two targa bar screw holes in the fender. I see that louvers in the cover are angled toward the rear. Also, the rubbery black sealant that stained the bar cover is still on the targa bar. I don't think that it needs any foam filler. Have I lost my mind?

BTW, I found out that "closed cell" foam means that it has a water and air impermeable surface, so it definitely would not conduct air or water through the vent.

FWIW, I agree with SpyderMike about needing two felt strips.