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Thread: Early OE headlight gaskets trim gasket versus what "they" sell these days

  1. 09-07-2014, 09:00 AM #1
    Neil '67 911S
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    Early OE headlight gaskets trim gasket versus what "they" sell these days

    For the past 30 years, every place I have tried sells a headlight trim gasket that is too thick. Here are photos and measurements of an OE chrome trim to fender lip gasket from Ol' Ivory (Sept 1966 '67 911S). Measurements are approximate.

    OE Gasket (real rubber):
    In cross-section, the top or forward facing OE gasket has three "steps" and in total, is 7.5 mm wide.
    The first step inner radius section is 1 mm thick and 2.5 mm wide.
    The second step (center) is 3.75 mm thick and 1 mm wide.
    The third step outer radius is 2.75 mm thick and 3.5 mm wide

    No, the numbers don't add up as there is a curved transition between the first and second steps.

    What all the vendors (Stoddard, PB Tweeks, Automotion, International Merchantile, etc. ad nauseum) have been selling for the SWB application since 1984 (foam rubber):

    In cross-section, the top or forward facing OE gasket has three "steps" and in total, is 7.75 mm wide.
    The first step inner radius section is 1.5 mm thick and 2.75 mm wide.
    The second step (center) is 6.25 mm thick and 2.25 mm wide (not including tapered section).
    The third step outer radius is 5 mm thick and 2.25 mm wide

    Photo 1: OE in cross section. Left to right: step 3, step 2, step 1

    Photo 2 and 3: OE forward (front) view. Left to right: step 3, step 2, step 1

    Photo 4: No wonder the damned things don't fit! OE on left, "other" gasket on right

    Photo 5: "Other" gasket on left, OE on right: cross-section
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    Last edited by Neil '67 911S; 09-07-2014 at 10:30 AM.
    - Neil
    '67 911S (Ol' Ivory)
    '82 Hewlett Packard 34C
    Early 911S Registry # 512
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  2. 09-07-2014, 09:41 AM #2
    ptrsbtrs
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    Great info! One always ass-u-me-s that if the parts are offered for sale that they've been reproduced correctly.
    What to do? Save the O.E. ones? or somehow trim or sand/flatten the current offerings to size?
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  3. 09-07-2014, 10:27 AM #3
    Silverbullit
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    Quote Originally Posted by ptrsbtrs View Post
    One always ass-u-me-s that if the parts are offered for sale that they've been reproduced correctly.
    I, for one, never make such an assumption.
    Brian
    S Reg #1032

    "I measured twice, cut three times, and it's still too short!"
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  4. 09-08-2014, 05:25 AM #4
    smedley
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    Terry sells the "correct" thinner one at Mercantile....his catalog is a bit confusing. Call and ask for the right one.
    Mark Smedley
    '59 VW Typ I
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  5. 09-09-2014, 03:33 AM #5
    Jrsully
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    can you give us more information Terry from Mercantile.? Would like to order some "correct"gaskets. Thx
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  6. 09-09-2014, 04:06 AM #6
    preS
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    Quote Originally Posted by Jrsully View Post
    can you give us more information Terry from Mercantile.? Would like to order some "correct"gaskets. Thx
    International Mercantile in Southern CA (like Carlsbad or Oceanside).

    Richard
    searching for engine (case) 903742
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  7. 09-09-2014, 04:08 AM #7
    rpc356
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    http://www.im356-911.com/
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  8. 09-09-2014, 07:14 AM #8
    Per Schroeder
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    FWIW, i had better luck using our 356 ones--

    http://www.stoddard.com/nla-631-115-...to-fender.html
    Per Schroeder
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