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Thread: Heat affected rear license panel paint

  1. #1

    Heat affected rear license panel paint

    After a recent engine rebuild (maybe not related) the paint on my rear licence plate panel has begun to blister and it does seem much hotter
    to touch than previous.

    Does the muffler have some sort of internal heat shield that might have stopped being effective as I think the muffler is quite old?
    Clyde Boyer


    1968 2.0 Coupe LHD, US delivered
    1972 2.5ST Cuope LHD Replica project LHD USA delivered 72T as base.
    1972 2.4T/E Coupe LHD US delivered 68,000 miles from new
    1973 2.4E Coupe RHD Aussie delivered
    1974 Alfa 2000 GTV Coupe, 9280 miles from new
    2006 Fezza Coupe RHS Aussie car manual 430.




    Early S Registry Member #294
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  2. #2
    member #1515
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    Maybe not stock, but I think I put some aluminized type insulation there.
    David

    '73 S Targa #0830 2.7 MFI rebuilt to RS specs

  3. #3
    Senior Member dirk07's Avatar
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    IMG_4514.jpglike this?

  4. #4
    Member
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    el sobrante ca.
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    A long time ago . I had that happen brand new paint job . The car was then tuned perfectly and it never happened again . It was a 1972 mechanical injection car..
    Last edited by bob joyce; 07-08-2018 at 11:30 AM. Reason: add more

  5. #5
    Quote Originally Posted by dirk07 View Post
    IMG_4514.jpglike this?
    Yes identical to that, even the same colour!!!

    What has tuning got to do with heat at the back end??
    Clyde Boyer


    1968 2.0 Coupe LHD, US delivered
    1972 2.5ST Cuope LHD Replica project LHD USA delivered 72T as base.
    1972 2.4T/E Coupe LHD US delivered 68,000 miles from new
    1973 2.4E Coupe RHD Aussie delivered
    1974 Alfa 2000 GTV Coupe, 9280 miles from new
    2006 Fezza Coupe RHS Aussie car manual 430.




    Early S Registry Member #294
    First Aussie R Gruppe Member #366
    TYP 901 Register Inc #6

  6. #6
    Senior Member Haasman's Avatar
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    I believe the later cars had an aluminized piece that attached to the inner side of the license plate panel. Sorry, don't have any further info.
    Haasman

    Registry #2489
    R Gruppe #722
    65 911 #302580
    70 914-6 #9140431874
    73 911s #9113300709

  7. #7
    Senior Member
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    You could try something like this https://www.summitracing.com/parts/t...iABEgL3FvD_BwE
    ESR # 2300

  8. #8
    Senior Member 72targa's Avatar
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    A very good friend who raced a lot added some very cool louvers to his license panel...
    Peter Kane

    '72 911S Targa
    Message Board Co-Moderator - Early 911S Registry #100

  9. #9
    If the ignition is retarded it can run hot.
    Steve Shea #1 joined a long time ago
    58 speedster
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    member Jackson Hole Ski Club

  10. #10
    This is/was a common problem on '73 and earlier cars...especially cars with sport mufflers or cars used on the track. The solution is simple. Take off your bumperettes and rear license panel and the rubber seal across the top. Then take a piece of aluminum (tin works too) the width of the license panel and about 6-8" down. It should be thick enough to be rigid but thin enough to bend. Your local hardware store will have something. Attach it to the area on the chassis approximately where the license panel seal sits. Pop rivets or sheet metal screws both work. Pre-bend it to curve over the top of the muffler and down to about the mid point in the muffler (approximately where the muffler seam is should be enough). It should rest approximately a 1/2" away from the muffler and but not touch the license panel. This will give you a heat shield between the muffler and your rear license panel. When you re-install your license panel it will be hidden and not seen but it will give you the heat protection you need. I've done this on several cars and never had a problem with paint burning or bubbling on the license panel again. I looked but unfortunately don't have a picture. If my description of what you need to make isn't clear enough let me know and I'll see what I can find.

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