Results 1 to 8 of 8

Thread: muffler baked paint

  1. #1

    muffler baked paint

    I am going to remove my rear valence panel (the one between the rear bumperettes) and repair the damage that the heat has caused to the panel.

    The paint on the valence is showing severe heat damage. The issue is that the paint is cracked and chiping away.

    I am using a stainless Bishoff muffler. I it is about 4 mm away from the tinwork. There is an additive to Glasurit paint that allows for heat damage.

    My question is this: should I consider venting the lower part of the tin? If I do so...should I have that metal punched or just cut for 2" holes.

    Stock piece of porsche here. Please help.

    Shawn.
    67 coupe roller
    99 M96 2.5 litre
    early911s reg 447
    R Gruppe 399

  2. #2
    Member
    Join Date
    Mar 2004
    Location
    San Francisco Bay Area
    Posts
    49

    Heat Shield

    When putting on fiberglass rear bumpers we make an aluminum shield to fit between the muffler and the panel. It is attached with pop rivets or nuts and bolts but I have seen some that are anchored using the existing license plate holes with a small spacer between the panel and the shield to prevent transmission of the heat to the panel. I'm sure this could be done with the stock steel or aluminum panel with no damage to the panel. Some get very creative with a more intricate heat shield using other materials. Your choice depending on the room you have to work with.

  3. #3
    Doesn't Dynamat or someone like that make a mat that you can glue in? Or even the cloth material used for headers. Neither is stock but may be easier than getting louvers to look good. Unless you do a cnc cut out of the RGruppe logo on the back????
    67 Normale, Old Rusty
    67 R Inspired and on a Diet
    73 T/ST Caged Beast
    RGruppe #383
    S Registry #739

  4. #4
    I used heat shield cloth. I got it from Jerry Woods, but I think you can get it from Summit Racing or Jegs. Went to Ace hardware and found industrial contact cement, for temps up to 300 degree. I glued it to the inside of the valance. I used it on 2 of our cars with the stock metal valance and a friends track car that had a fiberglass valance. Works great, no more paint blisters. I've had it on the cars for the past 4-5 yrs.
    Harold #334

  5. #5
    Harold, I just want to make sure I understand. You put it on the "inside" of the valance, not between the valance and the pipe? So it works as a heat sink?
    '73.5T -- ST replica project
    Member #1045

  6. #6
    I glued it to the inside of the valance.
    Attached Images Attached Images  

  7. #7

    sweet

    thanks guys. Shawn.bb
    67 coupe roller
    99 M96 2.5 litre
    early911s reg 447
    R Gruppe 399

  8. #8

    just back in from under my car...

    I forgot that I double gasketed the SSI's at the two muffler intakes. (I once ran with a Danske twin out sport muff that allowed for more room back there) I reinstalled the Bishoff with single gaskets and now have more room to work with.

    leecarrera, was your aluminum heat shield work vented? I like that idea and am now proceeding with the repaint. The bend for the aluminum panel is challenging but will be done to match the curve of the rear valence. Thanks alot for that.

    Please see the narrow body 1970 911 ST that I want my car to look like. S
    Attached Images Attached Images  
    67 coupe roller
    99 M96 2.5 litre
    early911s reg 447
    R Gruppe 399

Similar Threads

  1. Muffler paint
    By Cornpanzer in forum General Info
    Replies: 17
    Last Post: 01-26-2015, 05:03 AM
  2. What paint to use for muffler and heat exchangers?
    By Longballa in forum Technical Info
    Replies: 52
    Last Post: 02-08-2014, 12:34 PM
  3. Muffler hanger needed to mount stock muffler on 2.0 engine
    By 68911USA in forum For Sale: 911 Parts
    Replies: 4
    Last Post: 07-19-2010, 01:12 PM
  4. Muffler - Gray Paint
    By pacarguy in forum Technical Info
    Replies: 7
    Last Post: 07-20-2008, 04:10 AM
  5. Muffler Paint
    By 71-911T in forum Technical Info
    Replies: 13
    Last Post: 01-06-2008, 03:32 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Message Board Disclaimer and Terms of Use
This is a public forum. Messages posted here can be viewed by the public. The Early 911S Registry is not responsible for messages posted in its online forums, and any message will express the views of the author and not the Early 911S Registry. Use of online forums shall constitute the agreement of the user not to post anything of religious or political content, false and defamatory, inaccurate, abusive, vulgar, hateful, harassing, obscene, profane, sexually oriented, threatening, invasive of a person's privacy, or otherwise to violate the law and the further agreement of the user to be solely responsible for and hold the Early 911S Registry harmless in the event of any claim based on their message. Any viewer who finds a message objectionable should contact us immediately by email. The Early 911S Registry has the ability to remove objectionable messages and we will make every effort to do so, within a reasonable time frame, if we determine that removal is necessary.