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OvalinAz
Samba Mini Tech
Joined: June 09, 2009
Posts: 1095
Location: AZ
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 Posted: Sat May 07, 2016 1:55 am Post subject: NOS mint green fan plug? |
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I found this at the last bug o Rama here in AZ, it's a bag (probably not original Vw) but I have never seen a an plug other than black. This one hasn't ever been mounted either. Any info on this? The part # 311 105 383 like the other black plugs I have seen.
Thanks for any help!
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ataraxia
Samba Member
Joined: March 19, 2010
Posts: 4511
Location: Illinois
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| Posted: Sat May 07, 2016 6:02 am Post subject: Re: NOS mint green fan plug? |
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| It's an original part - not sure when they changed to black - I've got a few of them. Not uber rare but nice to have if you've got an early car. |
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EverettB 
Administrator
Joined: April 11, 2000
Posts: 71930
Location: Phoenix 602
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 23506
Location: Oklahoma City
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| Posted: Sat May 07, 2016 9:44 am Post subject: Re: NOS mint green fan plug? |
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| EverettB wrote: |
I've seen a few too but not sure why some were a different color.
There are definitely a ton more black ones.
I think I have a used one stored away somewhere, saved just because it wasn't black. |
Have you ever noticed a fit difference between the different colors? If so...that can many times explain a difference in why they change colors on a part whose color otherwise does not matter for its function.
It varies on plastic type...but all thermoplastics have some of this issue...the more pigment/colorant additive that is added by percentage to make a color....the higher the shrinkage rate after cooling when it comes out of the mold.
It takes a LOT more colorant to make white or light colors in plastics (typically titanium dioxide or calcium as the whitening agent).....than it does to color something with carbon black. There is less "collapse" after injection molding.
We see this all the time in over adding colorant as well. For instance with many red colorants....say with polypropylene and polyethylene (which is probably what that plug is made of).....a red plug would require only about 2% colorant. Adding 3%, 5% or 8%...does not make the plastic any more red or any deeper red.....but when overloading...you see shrinkage rates that are measurable.
Light colors like that mint green....are mostly white. Ray |
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EverettB
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Joined: April 11, 2000
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Location: Phoenix 602
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 23506
Location: Oklahoma City
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| Posted: Sun May 08, 2016 7:12 am Post subject: Re: NOS mint green fan plug? |
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| EverettB wrote: |
When I got it I didn't notice any difference between the 2 plugs as I do remember comparing them.
If I can find it again I will double check, if I have a black one here too. |
You may or may not find a difference. A,skilled molder can usually get around it. But there are a handful of reasons that are just simpler and cheaper to move to black plastic.
Ray |
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ataraxia
Samba Member
Joined: March 19, 2010
Posts: 4511
Location: Illinois
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| Posted: Sun May 08, 2016 7:14 am Post subject: Re: NOS mint green fan plug? |
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| Totally subjective, but I found the lighter colored cap harder to remove after being installed on the same pulley. |
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EverettB
Administrator
Joined: April 11, 2000
Posts: 71930
Location: Phoenix 602
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| Posted: Sun May 08, 2016 9:56 am Post subject: Re: NOS mint green fan plug? |
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For reference, here's an NOS black one I posted some time ago:
The part # has a "5" after it instead of a "1" but I don't know if that means anything other than a production run #.
Here are some more I had in the past and the last # varies and there is one with a "1" like the green cap:
Here's the green one I used to have but I can't read the full part #s there and could not find a larger version:
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rustyfastback
Samba Member
Joined: July 31, 2002
Posts: 841
Location: Georgia
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| Posted: Sun May 08, 2016 4:02 pm Post subject: Re: NOS mint green fan plug? |
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| I have one green cap. It came from a early september '65 euro 1966 squareback. I have only seen one other one other on a engine & it was out of a '66 also. Maybe the early '66 1600 motors were coming off the line while the factory still had some 1500-S motors & the green cap noted a 1600 engine. |
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ataraxia
Samba Member
Joined: March 19, 2010
Posts: 4511
Location: Illinois
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| Posted: Sun May 08, 2016 4:10 pm Post subject: Re: NOS mint green fan plug? |
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| rustyfastback wrote: |
| I have one green cap. It came from a early september '65 euro 1966 squareback. I have only seen one other one other on a engine & it was out of a '66 also. Maybe the early '66 1600 motors were coming off the line while the factory still had some 1500-S motors & the green cap noted a 1600 engine. |
I had a late 65 Variant S model with the green cap - the car had never been apart and the engine was original to the car. My early 64 also had one but I'm pretty sure that engine was rebuilt - although not much of a reason to replace the cap unless it was broken. |
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Tram
Samba Socialist
Joined: May 02, 2003
Posts: 23022
Location: Northwest of Normal
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| Posted: Sun May 08, 2016 4:10 pm Post subject: Re: NOS mint green fan plug? |
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Everyone is saying these caps are light green, but they look light blue to me both on the monitor and here in person.
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D/A/N
Samba Member
Joined: August 13, 2010
Posts: 2239
Location: 11222
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| Posted: Sun May 08, 2016 6:04 pm Post subject: Re: NOS mint green fan plug? |
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| Tram wrote: |
| Everyone is saying these caps are light green, but they look light blue to me both on the monitor and here in person. |
The only one that looks greenish to me is the one in Everett's post. The ones in the original post look perfectly white. I thought the OP was hallucinating a little. Though I ordered a seatbelt retractor from Wolfsburg West and it's actually greenish, not pure white. I wonder what it is about white plastic??? |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 23506
Location: Oklahoma City
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| Posted: Mon May 09, 2016 10:18 am Post subject: Re: NOS mint green fan plug? |
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| D/A/N wrote: |
| Tram wrote: |
| Everyone is saying these caps are light green, but they look light blue to me both on the monitor and here in person. |
The only one that looks greenish to me is the one in Everett's post. The ones in the original post look perfectly white. I thought the OP was hallucinating a little. Though I ordered a seatbelt retractor from Wolfsburg West and it's actually greenish, not pure white. I wonder what it is about white plastic??? |
Don't get me started  ....I work with color, color management and standards....and spend a lot of my time training people to work with color. Its hard getting people to understand what makes color.....and white and black are the tow hardest for people to grasp the reality of.
The pigments that make white plastic white are the same pigments that are used to make paints, inks dyes etc...white.
Its not just white plastic...its white ANYTHING. Bear in mind...white is not white just like red is not red and blue is not blue. The pigments are filters.
White light (sunlight) contains all colors of the spectrum. A substance that appears blue to your eye is one that absorbs all other light spectrum that hits it and only reflects the blue range to your eyes.
Along those same lines....white pigments appear white to your eye because there is at a molecular level a wide range of color reflecting agents within any of the known white pigments.....so it reflects the entire range of spectrum of white light back to your eye...so you see white.
Because of that wide range of color reflectivity...and the fact that white pigments are organic...mined out of the ground largely....they can be contaminated or tweaked in many ways.
A white plastic or paint etc....can take on a hue (exact color)....that ranges all over the rainbow from something as small as an oil smudge on the surface acting as a filter...to microscopic contaminants in the pigment or polymer base during molding...all of which act as a filter to absorb one slice of the light spectrum or another....causing a color shift.
Bluntly put....white plastic, inks, paints etc.....will NEVER, NEVER, NEVER be exactly the same way twice unless they are mixed from the same pigment batch and are using the same base polymers and solvents from the same batches.
The color differences can be from subtle to huge. White is THE hardest color to reproduce in any industry.
Not even to mention ....if you are viewing a white molded part...or painted or powder coated part...under varying lighting. Since white reflects back the spectrum of white light....iif your light source is "less white"...say if one is looking at it under 5200K lighting compared to 6500K lighting....the 5200 will appear about 10% more blue...while 6500 can make it look more greenish or yellowish.
Ray |
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