 Drilling weep holes, Keeping the trunk rust free (ish). |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
  |
| Shivers |
 Jan 22 2026, 09:55 AM
Post
#1
|
|
Senior Member  Group: Members Posts: 3,228 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California  |
When I got my 1972 it came with trunk rust, it was 10 years old. My 1974 has a big hole where the trunk should be. But Howard here has a trunk without any holes not designed to be there. I can remember some members here, I think Sir Andy was one talking about drilling or had drilled weep holes to let the moisture out. I’m looking for some direction on location of the holes and what size has worked best. Did you weld tubing to the hole to run it past the heat shield and muffler? Thanks
 |
   |
 
|
| 930cabman |
Jan 22 2026, 10:05 AM
Post
#2
|
|
Advanced Member Group: Members Posts: 4,462 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States 
|
|
|
|
|
| Shivers |
Jan 22 2026, 10:14 AM
Post
#3
|
|
Senior Member Group: Members Posts: 3,228 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
QUOTE(930cabman @ Jan 22 2026, 08:05 AM)  On the other two probably. Though this car has no rust now, anything designed not to leak will leak. Weep holes at the bottom of an incline just makes sense. @930cabman |
|
|
|
| Root_Werks |
Jan 22 2026, 10:23 AM
Post
#4
|
|
Village Idiot Group: Members Posts: 8,880 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest
|
Did rear trunks have weep/drain holes? I know frunk does.
|
 |
|
| Shivers |
Jan 22 2026, 10:41 AM
Post
#5
|
|
Senior Member Group: Members Posts: 3,228 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
QUOTE(Root_Werks @ Jan 22 2026, 08:23 AM) Did rear trunks have weep/drain holes? I know frunk does. This is a 71 and it does not. Maybe later? |
|
|
|
| Spoke |
Jan 22 2026, 11:48 AM
Post
#6
|
|
Jerry Group: Members Posts: 7,318 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
|
I had a leak around the rear light housings so I drilled a hole on each side and put these in to drain. I've since fixed the hole but in reality the trunk should have a way to drain water.
Drain Tube Part#: 911-631-259-02-M260 $4.50  |
|
|
|
| Shivers |
Jan 22 2026, 12:24 PM
Post
#7
|
|
Senior Member Group: Members Posts: 3,228 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
QUOTE(Spoke @ Jan 22 2026, 09:48 AM) I had a leak around the rear light housings so I drilled a hole on each side and put these in to drain. I've since fixed the hole but in reality the trunk should have a way to drain water. Drain Tube Part#: 911-631-259-02-M260 $4.50 Oh dude, that's the ticket. Now I just need to know where to put them. Both my other cars had no rust on the sides, it is like from the recovery point brace under the car towards the center. Maybe just buy four and evenly space them across the center section. Thanks <ordered> |
|
|
|
| eric9144 |
Jan 22 2026, 12:38 PM
Post
#8
|
|
Advanced Member Group: Members Posts: 2,791 Joined: 30-March 11 From: San Diego, CA Member No.: 12,876 Region Association: Southern California
|
A long time ago, someone actually suggested using a good bead of black silicone bathroom caulk on the tail light housings vs the funky foam seals that we're supposed to use. Seals -way- better and if you have leaks in those areas (most do), its an easy cost effective "one and done" solution.
The weep holes are a good idea! (IMG:style_emoticons/default/beerchug.gif) |
|
|
|
| Shivers |
Jan 22 2026, 12:43 PM
Post
#9
|
|
Senior Member Group: Members Posts: 3,228 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
QUOTE(eric9144 @ Jan 22 2026, 10:38 AM) A long time ago, someone actually suggested using a good bead of black silicone bathroom caulk on the tail light housings vs the funky foam seals that we're supposed to use. Seals -way- better and if you have leaks in those areas (most do), its an easy cost effective "one and done" solution. The weep holes are a good idea! (IMG:style_emoticons/default/beerchug.gif) Thanks Eric, the stock seals are lacking. |
|
|
|
| 930cabman |
Jan 22 2026, 01:12 PM
Post
#10
|
|
Advanced Member Group: Members Posts: 4,462 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
|
QUOTE(eric9144 @ Jan 22 2026, 01:38 PM) A long time ago, someone actually suggested using a good bead of black silicone bathroom caulk on the tail light housings vs the funky foam seals that we're supposed to use. Seals -way- better and if you have leaks in those areas (most do), its an easy cost effective "one and done" solution. The weep holes are a good idea! (IMG:style_emoticons/default/beerchug.gif) Be careful not to imbed the light housings in sealant, you will never be able to remove them without significant damage. Don't ask weeps are probably a great idea, or even better, never take her out when it's raining |
|
|
|
|
5 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
|
Lo-Fi Version | Time is now: 22nd January 2026 - 01:28 PM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.