Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> Drilling weep holes, Keeping the trunk rust free (ish).
Shivers
post Jan 22 2026, 09:55 AM
Post #1


Senior Member
****

Group: Members
Posts: 3,231
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

Attached Image
User is online!Profile CardPM
Go to the top of the page
+Quote Post
930cabman
post 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
(IMG:style_emoticons/default/popcorn[1].gif)

is the entrance point leaky tail lights?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Shivers
post Jan 22 2026, 10:14 AM
Post #3


Senior Member
****

Group: Members
Posts: 3,231
Joined: 19-October 20
From: La Quinta, CA
Member No.: 24,781
Region Association: Southern California
QUOTE(930cabman @ Jan 22 2026, 08:05 AM) *

(IMG:style_emoticons/default/popcorn[1].gif)

is the entrance point leaky tail lights?


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
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Root_Werks
post Jan 22 2026, 10:23 AM
Post #4


Village Idiot
*****

Group: Members
Posts: 8,881
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.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Shivers
post Jan 22 2026, 10:41 AM
Post #5


Senior Member
****

Group: Members
Posts: 3,231
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?
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Spoke
post 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

Attached Image
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Shivers
post Jan 22 2026, 12:24 PM
Post #7


Senior Member
****

Group: Members
Posts: 3,231
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

Attached Image

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>
User is online!Profile CardPM
Go to the top of the page
+Quote Post
eric9144
post 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)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Shivers
post Jan 22 2026, 12:43 PM
Post #9


Senior Member
****

Group: Members
Posts: 3,231
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.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
930cabman
post 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
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mlindner
post Jan 22 2026, 01:43 PM
Post #11


Senior Member
***

Group: Members
Posts: 1,724
Joined: 11-November 11
From: Merrimac, WI
Member No.: 13,770
Region Association: Upper MidWest
Not sure about the trunk, but many years ago (35)years I drill extra weep holes on the lowest portion of the hell holes each side. Now 50 years old and still good. Mark
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Shivers
post Jan 22 2026, 02:28 PM
Post #12


Senior Member
****

Group: Members
Posts: 3,231
Joined: 19-October 20
From: La Quinta, CA
Member No.: 24,781
Region Association: Southern California
QUOTE(mlindner @ Jan 22 2026, 11:43 AM) *

Not sure about the trunk, but many years ago (35)years I drill extra weep holes on the lowest portion of the hell holes each side. Now 50 years old and still good. Mark


That’s a good idea, Mark.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
anderssj
post Jan 22 2026, 04:27 PM
Post #13


Dog is my copilot...
***

Group: Members
Posts: 1,773
Joined: 28-January 03
From: VA
Member No.: 207
Region Association: MidAtlantic Region
Maybe put a little water in the trunk to locate the lowest point(s)/where water collects, then drill small hole in the center of the wet area(s)? (IMG:style_emoticons/default/idea.gif)

Probably want to have the car as level as possible before you start...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
burton73
post Jan 22 2026, 06:40 PM
Post #14


Senior member, and old dude
****

Group: Members
Posts: 3,952
Joined: 2-January 07
From: Los Angeles
Member No.: 7,414
Region Association: Southern California
@ Shivers
I have seen these on my 914-6 up front. This seems to be the perfect thing for to use for the back of trunk. My rear trunk does not have any and I think that you will not be driving or storing you finished car in the rain but I could be wrong. Here in So California not much rain

Best Bob B
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Shivers
post Jan 23 2026, 06:56 AM
Post #15


Senior Member
****

Group: Members
Posts: 3,231
Joined: 19-October 20
From: La Quinta, CA
Member No.: 24,781
Region Association: Southern California
QUOTE(burton73 @ Jan 22 2026, 04:40 PM) *

@ Shivers
I have seen these on my 914-6 up front. This seems to be the perfect thing for to use for the back of trunk. My rear trunk does not have any and I think that you will not be driving or storing you finished car in the rain but I could be wrong. Here in So California not much rain

Best Bob B
Attached Image


We get a good rain every few years out here. But I have a garage & a carport. I like those, but at 4.50 I don't feel bad about having ordered the others already. Thanks Bob
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Shivers
post Jan 23 2026, 06:57 AM
Post #16


Senior Member
****

Group: Members
Posts: 3,231
Joined: 19-October 20
From: La Quinta, CA
Member No.: 24,781
Region Association: Southern California
QUOTE(anderssj @ Jan 22 2026, 02:27 PM) *

Maybe put a little water in the trunk to locate the lowest point(s)/where water collects, then drill small hole in the center of the wet area(s)? (IMG:style_emoticons/default/idea.gif)

Probably want to have the car as level as possible before you start...


I will do this today. Thanks
User is online!Profile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
6 User(s) are reading this topic (4 Guests and 0 Anonymous Users)
2 Members: fixer34, bob164

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 23rd January 2026 - 07:14 AM
Invision Power Board v9.1.4 © 2026  IPS, Inc.
...
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...