Terminologies - BMW Luxury Touring Community
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post #1 of 3 Old Sep 30th, 2018, 11:44 am Thread Starter
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Terminologies

Pardon my ignorance, but I constantly see references to Hex heads, Wet heads, Air heads, Oil heads, and possibly other "heads".
Can someone enlighten me on these terminologies?
Thanks

2008 R1200RT
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post #2 of 3 Old Sep 30th, 2018, 5:30 pm
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Re: Terminologies

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Originally Posted by flyingdane View Post
Pardon my ignorance, but I constantly see references to Hex heads, Wet heads, Air heads, Oil heads, and possibly other "heads".
Can someone enlighten me on these terminologies?
Thanks
My dates on the manufacturing periods are likely off. I'm sure someone will correct me.
Airhead: The original BMW motorcycle motor. Cooled by airflow (altho some models also had an oil cooler). Made from ~1923 to 1995.
Oilhead: Next in the lineup. Air and oil cooled. Made from ~1995 to 2004 or so.
Hexhead: Supplanted the Oilhead series. Also Air & oil cooled. Called "Hexhead" because of the valve cover shape and to distinguish from the Oilheads. From ~2005 to 2010 or so.
Camhead: An evolution of the Hexhead series. Also air/oil cooled. Valves use shims for adjustment. From ~2010 to 2013
Wethead: The is the air/water cooled models

See also: https://w6rec.com/bmw-motorcycle-dic...rms-and-slang/
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post #3 of 3 Old Sep 30th, 2018, 5:33 pm
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Re: Terminologies

Quote:
Originally Posted by flyingdane View Post
Pardon my ignorance, but I constantly see references to Hex heads, Wet heads, Air heads, Oil heads, and possibly other "heads".
Can someone enlighten me on these terminologies?
Thanks
My dates on the manufacturing periods are likely off. I'm sure someone will correct me.
Airhead: The original BMW motorcycle motor. Cooled by airflow (altho some models also had a supplementary oil cooler). Made from ~1923 to 1995.
Oilhead: Next in the lineup. Air and oil cooled. Made from ~1995 to 2004 or so.
Hexhead: Supplanted the Oilhead series. Also Air & oil cooled. Called "Hexhead" because of the valve cover shape and to distinguish from the Oilheads. From ~2005 to 2010 or so.
Camhead: An evolution of the Hexhead series. Also air/oil cooled. Valves use shims for adjustment. From ~2010 to 2013
Wethead: The is the current air/water cooled models

See also: https://w6rec.com/bmw-motorcycle-dic...rms-and-slang/
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