BMW K bikes (Bricks)


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1Back to top Go down   Crank cover material Empty Crank cover material Tue Jun 07, 2016 2:46 pm

jrocker3235

jrocker3235
active member
active member
Is the K100 crank cover made of cast aluminum?  Thanks.

    

2Back to top Go down   Crank cover material Empty Re: Crank cover material Tue Jun 07, 2016 3:24 pm

duck

duck
Life time member
Life time member
Aluminum alloy.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

3Back to top Go down   Crank cover material Empty Re: Crank cover material Tue Jun 07, 2016 4:17 pm

jrocker3235

jrocker3235
active member
active member
Thanks duck

    

4Back to top Go down   Crank cover material Empty Re: Crank cover material Tue Jun 07, 2016 7:18 pm

jrocker3235

jrocker3235
active member
active member
Anyone ever seen or tried to anodize these their crank or cam covers?

    

5Back to top Go down   Crank cover material Empty Re: Crank cover material Wed Jun 08, 2016 2:49 am

duck

duck
Life time member
Life time member
I've had both K75 and K100 engine covers done in "Chromex" ceramic coating.  Lots of shiny goodness!

Crank cover material K75tfirstride1leftside


Crank cover material K75tfirstride2rightside


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

6Back to top Go down   Crank cover material Empty Re: Crank cover material Wed Jun 08, 2016 8:02 am

Holister

Holister
Life time member
Life time member
jrocker3235 wrote:Anyone ever seen or tried to anodize these their crank or cam covers?
Aluminium alloy can't be anaodised


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 Crank cover material Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

7Back to top Go down   Crank cover material Empty Re: Crank cover material Wed Jun 08, 2016 9:33 am

duck

duck
Life time member
Life time member
I was curious so I just Googled "anodize aluminum alloy" and it does look like some aluminum alloys can be anodized - at least some of them. Not sure about our engine covers though.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

8Back to top Go down   Crank cover material Empty Alodine Wed Jun 08, 2016 10:42 am

kennybob

kennybob
Silver member
Silver member
If you want to put a protective finish and/or add some color to the surface, then consider alodining, which is the chemical application of a protective chromate conversion coating on aluminum.

http://www.eaa1000.av.org/technicl/corrosion/alodine.htm

    

9Back to top Go down   Crank cover material Empty Re: Crank cover material Wed Jun 08, 2016 11:48 am

jrocker3235

jrocker3235
active member
active member
You can definitely anodize alloys. Like you said it depends on the alloy though. Certain alloys will anodize and dye better than others. 5000 series alloys and up are good for anodizing. I wonder what alloy the K100 covers are. A google search turned up nothing. There has to be a reason you dont see more people anodizing the cam and crank covers though.

    

10Back to top Go down   Crank cover material Empty Re: Crank cover material Wed Jun 08, 2016 11:58 am

jrocker3235

jrocker3235
active member
active member
Thanks Kennybob. We use alodine at work and I am really looking at anodizing for the aesthetic aspect over the protective.

    

11Back to top Go down   Crank cover material Empty Re: Crank cover material Wed Jun 08, 2016 12:37 pm

duck

duck
Life time member
Life time member
jrocker3235 wrote:Thanks Kennybob. We use alodine at work and I am really looking at anodizing for the aesthetic aspect over the protective.

I hope this works out for you and look forward to seeing the results.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

12Back to top Go down   Crank cover material Empty Re: Crank cover material Wed Jun 08, 2016 9:19 pm

Holister

Holister
Life time member
Life time member
jrocker3235 wrote:..... There has to be a reason you dont see more people anodizing the cam and crank covers though.
"More"?.... I've not seen any. There is a reason. Cast aluminium alloy cannot be anodised. It's composition is very different to extruded aluminium and even uses a different numerical system to identify its composition. Anodising creates an oxidised coating over the surface of the aluminium. This has a cellular structure which is then sealed off in the final process preventing further oxidation. With the higher content of alloy metals such as magnesium and copper you find in cast aluminium, this cellular aluminium oxide coating cannot form properly.

The alodine process maybe different but I'm guessing the same may apply.


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 Crank cover material Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

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