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heat shields

Discussion in '308/328' started by Raricar, Aug 23, 2010.

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  1. Raricar

    Raricar Karting

    Jun 17, 2010
    246
    Greenwood Village CO
    Full Name:
    Bill M
    #1 Raricar, Aug 23, 2010
    Does anyone have a suggestion for, or a photo of, a heat shield below the alternator? My car had part of the shield removed. I have seen a few views and I would like to know how far it would go behind the alternator. As well as how it was attached.
     
  2. robertgarven

    robertgarven F1 Veteran
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    Feb 24, 2002
    5,294
    Ventura, California
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    Robert Garven
    #2 robertgarven, Aug 23, 2010
    Last edited by a moderator: Sep 7, 2017
  3. rolindsay

    rolindsay Formula 3

    Jul 14, 2006
    1,022
    Houston, TX
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    Rick Lindsay
    #3 rolindsay, Aug 24, 2010
    Rob, I really like your impromptu timing marks! I wish I had thought of something so mind-numbingly clever when I was doing belts a month or so ago. -rick
     
  4. Raricar

    Raricar Karting

    Jun 17, 2010
    246
    Greenwood Village CO
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    Bill M
    #4 Raricar, Aug 24, 2010
    Thanks for posting the photos. I started snipping some aluminum last night.
     
  5. robertgarven

    robertgarven F1 Veteran
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    Feb 24, 2002
    5,294
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    Robert Garven
    #5 robertgarven, Aug 24, 2010
    Last edited by a moderator: Sep 7, 2017
    what are you missing i can take some measurements and photos this weekend?

    Rick, the marks help me figure out when I am getting close to the marks so i can go around to the flywheel. I am going to be using these soon!The marks on the bolt are to make sure it is not falling off! HA
    Image Unavailable, Please Login
     
  6. gerritv

    gerritv Formula 3

    Jun 18, 2001
    1,400
    St Catharines
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    Gerrit
    #6 gerritv, Aug 25, 2010
    the Euro heat shields are different, if you need pics of those I can try to find some for you.

    Gerrrit

    http://dino308gt4.com
    Have you hugged your car today?
     
  7. Raricar

    Raricar Karting

    Jun 17, 2010
    246
    Greenwood Village CO
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    Bill M
    #7 Raricar, Aug 25, 2010
    Now I understand the problem. My headers have been stripped of the aluminum covers and fiberglass fill, the good part of this is they dont get holes anymore the bad part is they are hot! I'm guessing custom bent shields are required. I have concidered thermal wrap but I know what that can do to the tube after a couple of years. Perhaps the Euro pipes are different.
     
  8. BigTex

    BigTex Seven Time F1 World Champ
    Owner Rossa Subscribed

    Dec 6, 2002
    79,380
    Houston, Texas
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    Bubba
    #8 BigTex, Aug 25, 2010
    Headers themselves are the same, ours got wrapped to help the thermo muffler oxidize unburned HCs......

    You need those two that Robert shows, and our alternators had a flat round plate on the back with standoff straps, for heat I guess...

    It's warm under there either way!!
     
  9. BigTex

    BigTex Seven Time F1 World Champ
    Owner Rossa Subscribed

    Dec 6, 2002
    79,380
    Houston, Texas
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    Bubba
    #9 BigTex, Aug 25, 2010
    I could pull my #23 and #24 and have the gf's shop replicate them.......sheet metal fab shop.

    It was asbestos fill, by the way.......
     
  10. robertgarven

    robertgarven F1 Veteran
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    Feb 24, 2002
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    Robert Garven
    #10 robertgarven, Aug 25, 2010
    if you have the money I would invest in tubi headers and without smog pumps they would be fine. without the pumps running my engine bay temps are 100 degrees cooler.

    Another solution would be jet coating them.
     
  11. Raricar

    Raricar Karting

    Jun 17, 2010
    246
    Greenwood Village CO
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    Bill M
    #11 Raricar, Aug 25, 2010
    I have been running with Jet coat headers but I was thinking a little protection on the alternator might not be a bad idea after looking at the prices of replacements. I have fabricated a small heat shield to fit in that area, 2 thin 1100 series aluminum .016 sheets with a thermal barrier between. I will see what my laser thermometer says tomorrow with and without. Maybe more fun then necessary. First I have to patch the gas tank on my Beemer.
     
  12. gerritv

    gerritv Formula 3

    Jun 18, 2001
    1,400
    St Catharines
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    Gerrit
    #12 gerritv, Aug 25, 2010
    Raricar, do you have a Euro or US car? Euro didn't have the header covers at all, instead they have shields bolted on to the headers. The other covers over the RH exhaust pipe are also different. US cars had stainless there, Euro is Al.

    Gerrit
     
  13. robertgarven

    robertgarven F1 Veteran
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    Feb 24, 2002
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    Robert Garven
    #13 robertgarven, Aug 25, 2010
    Last edited by a moderator: Sep 7, 2017
  14. Raricar

    Raricar Karting

    Jun 17, 2010
    246
    Greenwood Village CO
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    Bill M
    #14 Raricar, Aug 26, 2010
    My car is a US version that had been stripped of the thermal reactors before I got it. Lots of holes in the headers! With that repaired and the headers coated I'm trying to mitigate some of the heat. The heat shield I made looks like number 17 in the above. I wrapped the fuel line, though I dont think that is to much of a problem mostly its the alternator. Thanks for the Euro drawings.
     
  15. FasterIsBetter

    FasterIsBetter F1 Veteran

    Jul 22, 2004
    5,855
    NoNJ/Jupiter FL
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    Steve W.
    #15 FasterIsBetter, Aug 26, 2010
    If your only concern is the alternator, I wouldn't worry too much. They are pretty robust and are designed to be exposed to the heat in the engine bay. And rebuilding one is not that expensive. I just had the Bosch alternator from my '86 328 rebuilt by a local shop for $150. Came back looking better than new. If the alternator on your car goes, don't go buy a new one. These are easily rebuilt, and since most of them are Bosch, the parts are readily available.

    That said, installing a shield to keep the heat exposure down can't hurt it. But there are probably a 100 other projects you could work on with your car that are more pressing than making a heat shield for the alternator.

    My $.02.
     
  16. onboost

    onboost Formula Junior

    Apr 13, 2004
    758
    DC Metro area
    #16 onboost, Aug 26, 2010
    Last edited by a moderator: Sep 7, 2017
    Out of curiosity what year is your car?


    I remeber a thread related to plugging the holes in the headers after removing item #12 in the drwaing. Any more details on where to buy the correct plugs etc..?

    Thx
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  17. Raricar

    Raricar Karting

    Jun 17, 2010
    246
    Greenwood Village CO
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    Bill M
    #17 Raricar, Aug 26, 2010
    My car is was made in May 1975 but it is titled a 1976 rebadged Ferrari with 5 spoke Campy wheels. As for the plugs I made eight steel 12mm X 1.25mm pitch plugs about 10mm long trimmed off and slotted to fit the bungs on the headers.
     
  18. Raricar

    Raricar Karting

    Jun 17, 2010
    246
    Greenwood Village CO
    Full Name:
    Bill M
    #18 Raricar, Aug 26, 2010
    Last edited by a moderator: Sep 7, 2017
  19. fly308

    fly308 Karting

    Jun 23, 2007
    183
    Bend, OR
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    Ray
    #19 fly308, Sep 12, 2010
    I have two spare heat shields. #23 in post 6 and #26 in post 13
     
  20. enzo777enzo

    enzo777enzo Rookie

    Oct 29, 2013
    43
    Argentina - La Pampa
    #20 enzo777enzo, May 9, 2014
    Hello my car not have any heat shield.
    i thing made asbesto between two sheet stanel steel o one one sheet ot alumine.-
    i think more importan, first is made item *16, 17 and 18 in draw post 13.-
    Can anyone send pics or measure of this shields???
    regards
    Enzo
     

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