# Roof Heat Sink. **URL:** \ **Category:** Ectomobiles\ **Created:** [July 9, 2019, 7:41am UTC](https://forum.gbfans.com/t/roof-heat-sink/3177 "2019-07-09T07:41:56Z")\ **Posts on this page:** 19\ **Page:** 1
**Author:** ![Stantz1981](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/s/a3d4f5/32.png) [@Stantz1981](https://forum.gbfans.com/u/Stantz1981)\ **Post date:** [July 9, 2019, 7:41am UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/1 "2019-07-09T07:41:56Z")
Does anyone know what type/make/model the heatsink was used on the roof rack? The one towards the rear near the radome. ---
**Author:** ![910dohead](https://forum.gbfans.com/user_avatar/forum.gbfans.com/910dohead/32/38855_2.png) [@910dohead](https://forum.gbfans.com/u/910dohead)\ **Post date:** [July 10, 2019, 3:28pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/2 "2019-07-10T15:28:26Z")
It’s unknown. Basically, it’s two identical heatsinks connected back-to-back. It also appears on the [Ecto-1A](https://www.gbfans.com/wiki/uncategorized/ecto-1a). I have been trying to ID it for years. I think they may have either come from the inside of a massive computer workstation from a company called Burroughs or out of equipment found on a Lockheed P3 Orion surveillance aircraft, but I don’t have the proof. ---
**Author:** ![DeLoreanDMC81](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/d/e495f1/32.png) [@DeLoreanDMC81](https://forum.gbfans.com/u/DeLoreanDMC81)\ **Post date:** [February 3, 2020, 8:35pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/3 "2020-02-03T20:35:08Z")
I’ve got a correct looking vintage heat sink for the [Ecto-1](https://www.gbfans.com/wiki/uncategorized/ecto-1), but I have no clue who makes it? James ---
**Author:** ![910dohead](https://forum.gbfans.com/user_avatar/forum.gbfans.com/910dohead/32/38855_2.png) [@910dohead](https://forum.gbfans.com/u/910dohead)\ **Post date:** [February 3, 2020, 8:39pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/4 "2020-02-03T20:39:33Z")
Let’s see it? ---
**Author:** ![DeLoreanDMC81](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/d/e495f1/32.png) [@DeLoreanDMC81](https://forum.gbfans.com/u/DeLoreanDMC81)\ **Post date:** [February 8, 2020, 2:36am UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/5 "2020-02-08T02:36:27Z")
It measures at 13" long. James ---
**Author:** ![910dohead](https://forum.gbfans.com/user_avatar/forum.gbfans.com/910dohead/32/38855_2.png) [@910dohead](https://forum.gbfans.com/u/910dohead)\ **Post date:** [February 8, 2020, 3:40am UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/6 "2020-02-08T03:40:04Z")
This is a picture of the correct heatsink on the [Ecto-1](https://www.gbfans.com/wiki/uncategorized/ecto-1). It’s actually two separate heatsinks bolted together and not a single one. Plus, the way the fins are designed possibly makes it proprietary. ![image](https://discdn.gbfans.com/original/3X/1/9/19bcc46259f8a284c0177faa9865f11fd5bdf6df.png) ---
**Author:** ![DeLoreanDMC81](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/d/e495f1/32.png) [@DeLoreanDMC81](https://forum.gbfans.com/u/DeLoreanDMC81)\ **Post date:** [February 8, 2020, 4:13am UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/7 "2020-02-08T04:13:16Z")
> [@910dohead post\_id=4930932 time=1581133204 user\_id=36345](#): > > This is a picture of the correct heatsink on the Ecto-1. It’s actually two separate heatsinks bolted together and not a single one. Plus, the way the fins are designed possibly makes it proprietary. Actually, that is the heat sink that got replaced in the “first” restoration. Probably around 1986 - 1988, just before [Ghostbusters 2](https://www.gbfans.com/wiki/FAQ/ghostbusters-2). And it’s the one they’ve kept on the car ever since. In fact, that is the same kind of heat sink that is used on the [Ecto-1A](https://www.gbfans.com/wiki/uncategorized/ecto-1a). The true original heat sink is like the one I have. Here are some pictures of the original black heat sink on the original filming car. **In this picture, just above Ray’s head, the original black heat sink can be seen:** ---
**Author:** ![drcaron](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/d/c67d28/32.png) [@drcaron](https://forum.gbfans.com/u/drcaron)\ **Post date:** [February 9, 2020, 12:11am UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/8 "2020-02-09T00:11:19Z")
> [@DeLoreanDMC81 post\_id=4930930 time=1581129387 user\_id=5600](#): > > It measures at 13" long. > > James Very happy you find one 🆒 ---
**Author:** ![GraygoryGruesome](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/g/85f322/32.png) [@GraygoryGruesome](https://forum.gbfans.com/u/GraygoryGruesome)\ **Post date:** [November 10, 2021, 4:08pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/9 "2021-11-10T16:08:24Z")
I happened to be at a small town surplus store, and they just had this lying on the shelf ![image](https://i.imgur.com/oL0Guzm.jpg) ---
**Author:** ![kingpin](https://forum.gbfans.com/user_avatar/forum.gbfans.com/kingpin/32/187259_2.png) [@kingpin](https://forum.gbfans.com/u/kingpin)\ **Post date:** [November 10, 2021, 10:38pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/10 "2021-11-10T22:38:27Z")
Fantastic find! ---
**Author:** ![The\_Searcher](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/t/c57346/32.png) [@The\_Searcher](https://forum.gbfans.com/u/The_Searcher)\ **Post date:** [January 21, 2022, 9:21am UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/11 "2022-01-21T09:21:03Z")
Isn’t the original black heat sink present here on the original Ectomobile in the opening of [Ghostbusters 2](https://www.gbfans.com/wiki/FAQ/ghostbusters-2)?: ![image](https://discdn.gbfans.com/original/2X/4/46b442d27a776ec25bda85275357642336dd4648.jpeg) ---
**Author:** ![kingpin](https://forum.gbfans.com/user_avatar/forum.gbfans.com/kingpin/32/187259_2.png) [@kingpin](https://forum.gbfans.com/u/kingpin)\ **Post date:** [January 21, 2022, 1:32pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/12 "2022-01-21T13:32:47Z")
> [@The Searcher](#): > > Isn’t the original black heat sink present here on the original Ectomobile in the opening of Ghostbusters 2?: > > ![image](https://discdn.gbfans.com/original/2X/4/46b442d27a776ec25bda85275357642336dd4648.jpeg) Sadly no, it looks like the heatsink on [Ecto-1](https://www.gbfans.com/wiki/uncategorized/ecto-1) at the start of GBII was the version 910dohead posted earlier in the thread: ![image](https://discdn.gbfans.com/original/2X/2/2a666e2f74023a16fcdd4d5289f7066d0a1ec955.jpeg) ---
**Author:** ![The\_Searcher](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/t/c57346/32.png) [@The\_Searcher](https://forum.gbfans.com/u/The_Searcher)\ **Post date:** [January 22, 2022, 7:59pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/13 "2022-01-22T19:59:22Z")
It appears my eyes have deceived me, but upon looking more closely, I can tell that it is not the original heat sink. ---
**Author:** ![910dohead](https://forum.gbfans.com/user_avatar/forum.gbfans.com/910dohead/32/38855_2.png) [@910dohead](https://forum.gbfans.com/u/910dohead)\ **Post date:** [January 29, 2022, 5:23pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/14 "2022-01-29T17:23:11Z")
Yeah, James/DeLoreanDMC81 is 1000% correct here. The heatsinks were swapped out sometime before [Ghostbusters 2](https://www.gbfans.com/wiki/FAQ/ghostbusters-2). The heatsink that’s on the [Ecto-1](https://www.gbfans.com/wiki/uncategorized/ecto-1) seen in the opening of the second film is the one that’s currently on the car now. Learning this blew my mind and still amazes me that there’s always more to learn about the props. Some 35+ years later and we’re still figuring this stuff out. ---
**Author:** ![Arty\_V](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/a/6f9a4e/32.png) [@Arty\_V](https://forum.gbfans.com/u/Arty_V)\ **Post date:** [January 29, 2022, 7:01pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/15 "2022-01-29T19:01:42Z")
Taking a break from working on a Saturday; my stab at an ID of the heatsink that was posted by DeLoreanDMC81 and GraygoryGruesome. Guessing that a large heatsink like this is/was designed with a particular component or class-size of component for particular application. I found multiple very similar designs from different companies. My best guess: #60105 profile from AAVID Thermalloy, now part of Boyd Corporation. Aavid Thermalloy catalog page: [https://info.boydcorp.com/hubfs/Thermal/Air-Cooling/Boyd-Aluminum-Extrusion-Selection-Guide.pdf](https://info.boydcorp.com/hubfs/Thermal/Air-Cooling/Boyd-Aluminum-Extrusion-Selection-Guide.pdf). Go to PDF page 53 and look at #11 Listing from the Boyd Corporation: [https://www.boydcorp.com/files/part-documentation/extrusion-60105-drawing.png](https://www.boydcorp.com/files/part-documentation/extrusion-60105-drawing.png) ---
**Author:** ![The\_Searcher](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/t/c57346/32.png) [@The\_Searcher](https://forum.gbfans.com/u/The_Searcher)\ **Post date:** [February 5, 2022, 9:32am UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/16 "2022-02-05T09:32:23Z")
The folks working on the Northern Illinois [Ghostbusters 2](https://www.gbfans.com/wiki/FAQ/ghostbusters-2) Ectomobile recently acquired what appears to be the correct heat sink: ![image](https://i.imgur.com/IX7hkoM.jpg) ---
**Author:** ![zedr](https://forum.gbfans.com/user_avatar/forum.gbfans.com/zedr/32/182556_2.png) [@zedr](https://forum.gbfans.com/u/zedr)\ **Post date:** [February 5, 2022, 4:29pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/17 "2022-02-05T16:29:45Z")
> [@The Searcher](#): > > The folks working on the Northern Illinois Ghostbusters 2 Ectomobile recently acquired what appears to be the correct heat sink: > > ![image](https://i.imgur.com/IX7hkoM.jpg) It’s being sold by our own 910dohead here in the for sale section. ---
**Author:** ![910dohead](https://forum.gbfans.com/user_avatar/forum.gbfans.com/910dohead/32/38855_2.png) [@910dohead](https://forum.gbfans.com/u/910dohead)\ **Post date:** [February 5, 2022, 5:04pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/18 "2022-02-05T17:04:48Z")
Yeah, they need a little cleanup but will look great afterwards. I just got around to cleaning off the set I have for myself. They’ve most likely been sitting in dirt since date of manufacture, so who knows for how long? ---
**Author:** ![DeLoreanDMC81](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/d/e495f1/32.png) [@DeLoreanDMC81](https://forum.gbfans.com/u/DeLoreanDMC81)\ **Post date:** [February 12, 2022, 7:10pm UTC](https://forum.gbfans.com/t/roof-heat-sink/3177/19 "2022-02-12T19:10:15Z")
> [@The Searcher](#): > > The folks working on the Northern Illinois Ghostbusters 2 Ectomobile recently acquired what appears to be the correct heat sink: > > ![image](https://discdn.gbfans.com/original/3X/c/2/c291c6394d6af4a4dcabc8bb7602ed3deb0e4ed0.jpeg) I also got a set of those. And they are dead on for what is on the original [Ecto-1A](https://www.gbfans.com/wiki/uncategorized/ecto-1a), and that horrible excuse of a restoration, the original [Ecto-1](https://www.gbfans.com/wiki/uncategorized/ecto-1).