C6 Underbody Question - CorvetteForum - Chevrolet Corvette Forum Discussion

Notices
C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

C6 Underbody Question

Old 11-18-2018, 07:16 PM
  #1  
BMF_C6
CF Member
Thread Starter
 
BMF_C6's Avatar
 
Member Since: Nov 2013
Location: Houston, Texas
Posts: 90
Thanked 11 Times in 10 Posts
Default C6 Underbody Question

I found an old thread about this area and I have to ask.....has anyone filled this void with spray in foam? I have been under my car a bunch the last month or two and on both sides the thick rubber tape is gone and the holes are exposed. There is also access to the cavity up near the front......this cavity is not fully sealed and was wondering why I couldn't just fill it with some high density foam and once it's cured trim the excess and spray with the Flex Seal stuff you see on TV? This would seal it permanently to keep moisture out and would help (maybe not) deaden this area a little bit.

Can anyone give a good reason this is not a good idea????


Why not fill this void with foam?
BMF_C6 is offline  
Old 11-18-2018, 08:03 PM
  #2  
torquetube
CF Senior Member
 
Member Since: Dec 2004
Location: West coast CA
Posts: 3,819
Thanked 152 Times in 132 Posts
Default

The factory didn't see fit to apply seam sealer there, and C6s don't seem to be rusting out... so I'd be loathe to fix what isn't obviously broken. Especially when the fix is irreversible and the long-term consequences are unobvious.

Generally it's better to give things a way to dry out rather than to attempt to make them watertight. If the foam fill is incomplete or comes loose, it could end up trapping water inside. Or if it's open-cell, it could act like a damp sponge.

torquetube is offline  
Old 11-19-2018, 04:27 PM
  #3  
Dave S
CF Senior Member
Support Corvetteforum!
 
Dave S's Avatar
 
Member Since: Mar 2005
Location: Jackson NJ
Posts: 3,410
Thanked 81 Times in 74 Posts
Default

Originally Posted by torquetube View Post
The factory didn't see fit to apply seam sealer there, and C6s don't seem to be rusting out... so I'd be loathe to fix what isn't obviously broken. Especially when the fix is irreversible and the long-term consequences are unobvious.

Generally it's better to give things a way to dry out rather than to attempt to make them watertight. If the foam fill is incomplete or comes loose, it could end up trapping water inside. Or if it's open-cell, it could act like a damp sponge.
If it ain't broke, don't fix it!
Dave S is offline  
Old 11-19-2018, 06:25 PM
  #4  
Odo
Junior Member
 
Member Since: Sep 2018
Posts: 15
Thanks: 0
Thanked 1 Time in 1 Post
Default

Originally Posted by torquetube View Post
Especially when the fix is irreversible and the long-term consequences are unobvious.
Generally it's better to give things a way to dry out rather than to attempt to make them watertight. If the foam fill is incomplete or comes loose, it could end up trapping water inside. Or if it's open-cell, it could act like a damp sponge.
+1 not to do it for this reason^.

Trying to reverse it would be a complete nightmare. You're better off just getting a water tight seal over the holes if you're worried the tape is missing. (Maybe do a small rubber plug with some RTV gasket around it or something?)

Last edited by Odo; 11-19-2018 at 06:26 PM.
Odo is offline  
Old 11-20-2018, 10:16 AM
  #5  
Orion2011
CF Senior Member
 
Member Since: Jun 2015
Location: Shelbyville Kentucky
Posts: 302
Thanked 17 Times in 13 Posts
Default

Water is a sneaky B*&^%, probably good to have a way for it to get out.
Orion2011 is offline  
Old 11-20-2018, 04:08 PM
  #6  
dr_gallup
CF Senior Member
 
dr_gallup's Avatar
 
Member Since: Feb 2016
Location: SC
Posts: 1,354
Thanked 123 Times in 109 Posts
Default

I'd be worried that the foam and or flex seal couldn't take the heat in addition to all the above.
dr_gallup is offline  
Old 11-25-2018, 12:34 PM
  #7  
Apocolipse
CF Senior Member
 
Member Since: Aug 2013
Posts: 1,703
Thanks: 0
Thanked 93 Times in 86 Posts
Default

The metal is so thick that foam wont do fk all.

Leave it be.
Apocolipse is offline  


Thread Tools
Search this Thread
Sponsored Ads
Vendor Directory

Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: