Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Do It Yourself Links & Resources > Bodywork - Repair, Paint, Tools, Tips & Tricks

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-01-2013, 06:51 PM
AwfulMechanic's Avatar
Registered User
 
Join Date: Jun 2013
Location: State College PA
Posts: 37
W123 Sunroof Drain. Massive Rust. Tips?

I bought this 78 300D last year, I knew it was going to be a hell of a project.

There was water on the floor and knew it was coming from the roof corners. I stripped the interior to get the mouse piss smell out, and bam, found this killer rust. Its on both sides.

For Photos, head right to the bottom. 78 300D Full Photos - Imgur

I'm not sure the best way to go about mending these drains. Honestly, not sure where to start. I was thinking a Dremel, JB Weld and some new pipe and tubing.

Does anyone know a right way to go about this?
Reply With Quote
  #2  
Old 07-01-2013, 08:30 PM
NC-Diesel's Avatar
Registered User
 
Join Date: Jul 2012
Location: Chapel Hill, NC
Posts: 402
I think based on the condition of the pictures (looks a lot worse than surface rust) your best bet is to find a junkyard or another member with a good sunroof pan. Once the headliner is out they are fairly easy to replace.
__________________
1978 Mercedes 240D
1981 Mercedes 240D
1982 Mercedes 240D
Reply With Quote
  #3  
Old 07-01-2013, 09:16 PM
Graham's Avatar
Registered User
 
Join Date: Nov 2004
Location: Ontario, Canada
Posts: 3,409
Wow - That's quite a mess. But cleaned up great on outside. Being in the middle of rust work on my car (interior also out), I suggest you have a look at the hood hinge pockets. On my car, the seams at bottom of pockets had rusted through and were letting water into car causing rust in various places.

Good Luck with it!
__________________
Graham
85 300D,72 350SL, 98 E320, Outback 2.5
Reply With Quote
  #4  
Old 07-01-2013, 09:19 PM
Registered User
 
Join Date: Apr 2011
Location: SF, CA, USA
Posts: 928
i recently repaired a sunroof drain on mine. pretty similar issue. in my case i cleaned and opened up the drain hole, then JB-welded in a short threaded brass pipe. i did several more applications of JBW to smooth out all the edges and gaps outside and in. when the (now relatively massive) joint was smooth i put POR-15 all over it. works great!
__________________
'77 240D, 504H, OM617.952, etc.
Reply With Quote
  #5  
Old 07-01-2013, 09:44 PM
AwfulMechanic's Avatar
Registered User
 
Join Date: Jun 2013
Location: State College PA
Posts: 37
Quote:
Originally Posted by NC-Diesel View Post
I think based on the condition of the pictures (looks a lot worse than surface rust) your best bet is to find a junkyard or another member with a good sunroof pan. Once the headliner is out they are fairly easy to replace.
I'd love to take this approach, but I'd not like to replace the headliner haha, that sounds very expensive. The sunroof pan drains are indeed completely rotted, but with a mending and a new sunroof seal, it should last until this car is ready to be parted out. From what I've read here once a headliner is out it's quite a task to get back on. Is it necessary to renew the liner?
Reply With Quote
  #6  
Old 07-01-2013, 10:00 PM
AwfulMechanic's Avatar
Registered User
 
Join Date: Jun 2013
Location: State College PA
Posts: 37
Quote:
Originally Posted by Graham View Post
Wow - That's quite a mess. But cleaned up great on outside. Being in the middle of rust work on my car (interior also out), I suggest you have a look at the hood hinge pockets. On my car, the seams at bottom of pockets had rusted through and were letting water into car causing rust in various places.

Good Luck with it!
Ah thanks! Mine are still filled with leaves and gunk. I'll clean them up and see what they look like and possible work that needs to be done. The only water was from these drains, so hopefully the pockets are still solid.
Reply With Quote
  #7  
Old 07-01-2013, 10:08 PM
Graham's Avatar
Registered User
 
Join Date: Nov 2004
Location: Ontario, Canada
Posts: 3,409
Quote:
Originally Posted by AwfulMechanic View Post
. From what I've read here once a headliner is out it's quite a task to get back on. Is it necessary to renew the liner?
One thing I found, was that it is very difficult to install the sunroof seal without lowering the pan. I only did the front seal, so only dismantled front side of headliner and some of pan screws just to let it drop a little at front. Makes seal installation much easier. By the way - don't buy a URO seal. They just do not fit. It's one place where you need the proper OE part.
__________________
Graham
85 300D,72 350SL, 98 E320, Outback 2.5
Reply With Quote
  #8  
Old 07-01-2013, 10:46 PM
AwfulMechanic's Avatar
Registered User
 
Join Date: Jun 2013
Location: State College PA
Posts: 37
Quote:
Originally Posted by Graham View Post
By the way - don't buy a URO seal. They just do not fit. It's one place where you need the proper OE part.
Your the second user to tell me that! I will stay well clear of URO.
Reply With Quote
  #9  
Old 07-01-2013, 11:57 PM
NC-Diesel's Avatar
Registered User
 
Join Date: Jul 2012
Location: Chapel Hill, NC
Posts: 402
I reuse headliners all the time. The key is being very gentle in removing them. And knowing where they are attached. I just took a headliner from an 82 and moved it to an 81 no problems. To get it back in right usually does require removing the back glass as the headliner gets tucked under there and glued to the pinch weld. ALso agree 100% with Graham. NO URO! This was one place I used the real mercedes part. They were not expensive. I also replaced the foam seal between the pan and roof. While I had the roof out I removed all rust, por-15 and chasis coat black. IT was a total rebuild I anticipate i will get many years before i have to fix anything on it!

Having the FSM works wonders. If you plan to part this out or not restore I would clean it up and JB weld that sucker as others have said.
__________________
1978 Mercedes 240D
1981 Mercedes 240D
1982 Mercedes 240D
Reply With Quote
  #10  
Old 07-02-2013, 01:01 AM
rudolfgreen's Avatar
registered cruiser
 
Join Date: Oct 2005
Location: HI
Posts: 556
You are an impressive awful mechanic.
Reply With Quote
  #11  
Old 07-02-2013, 01:55 AM
Registered User
 
Join Date: Jul 2008
Posts: 3,740
Don't forget, you can always do like a lot of other people have done....remover the felt strip and silicone the roof shut...
__________________
Reply With Quote
  #12  
Old 07-02-2013, 02:39 AM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,453
Removal of the head liner can be tricky - there is a lot of spray adhesive on the edges which tends to rip the fabric. I've seen new headliners advertised for about 100 euros over here...

...the problem is that there's a fair amount of foam between the head liner and the metal - that will be wet and still smell like the mice.

If I were you I'd go for the headliner removal and see if it will come out in one piece. Then do a replacement sun roof tray.

It seems like you are putting in a lot of effort to the car - it would be a shame to silly-cone the roof shut - see what Mike D has to say about silly-cone here =>

http://www.peachparts.com/shopforum/body-repair-restoration/339888-w114-rocker-panel-repair.html
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
Reply With Quote
  #13  
Old 07-02-2013, 08:09 AM
AwfulMechanic's Avatar
Registered User
 
Join Date: Jun 2013
Location: State College PA
Posts: 37
Quote:
Originally Posted by Stretch View Post
silly-cone
haha awesome.

I will definitely not silicone anything shut, I like the sunroof, slides around great. Well, it looks like I'm going to try and remove the headliner. Wish me luck.
Reply With Quote
  #14  
Old 07-02-2013, 08:15 AM
AwfulMechanic's Avatar
Registered User
 
Join Date: Jun 2013
Location: State College PA
Posts: 37
Quote:
Originally Posted by rudolfgreen View Post
You are an impressive awful mechanic.
Thanks man, this is my first project car. The first car I've ever worked on for fun haha.
Reply With Quote
  #15  
Old 07-02-2013, 09:09 AM
Graham's Avatar
Registered User
 
Join Date: Nov 2004
Location: Ontario, Canada
Posts: 3,409
Quote:
Originally Posted by Stretch View Post
see what Mike D has to say about silly-cone here =>
Stretch - What Mike says is true for some silicones. But all silicones are not created equal. Household silicones emit acetic acid (vinegar) as a byproduct - we have all smelled that odour when sealing bathtubs etc.

Other silicone sealants as made for electrical, auto and marine use are different and don't usually produce acetic acid. 3M and Dow Corning have sites that provide good application info. This article describes some of the different generic types (but in the end seems to be selling their acetone cure product):
INTERTRONICS Technical Bulletin - RTV Silicone Adhesive Sealants: A Brief Introduction to Acetone Cure
__________________
Graham
85 300D,72 350SL, 98 E320, Outback 2.5
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 02:35 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page