Can someone PLEASE tell me what the different - BMW Luxury Touring Community
 
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post #1 of 10 Old Sep 14th, 2009, 11:15 pm Thread Starter
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Can someone PLEASE tell me what the different

Models of BMW's are and the differences between them?
I know what a K engine is but what is a hex head, an oil head, an air head, a chrome head etc.?

I see references to them alll the time and would love to understand what they are.

Thanks!

Loren

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post #2 of 10 Old Sep 15th, 2009, 1:38 am
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Re: Can someone PLEASE tell me what the different

Boxer engines (opposed twins) -

Airhead is the old style 2 valve air cooled boxer engine made before 1994.
Oilhead is the 4 valve air and oil cooled boxer engine made from 1994 to around 2004
Chrome head was basically an Oilhead that was chromed in the R1200C and CLC lines
HexHead is the latest iteration of the Boxer engine in the R1200 series of bikes since around 2005, recognizable by the somewhat hex shape of the valve covers and heads.

There are also a couple of iterations of the K motors -

The "Flying Brick", which is/was a longitudinally mounted water cooled inline 3 or 4 cylinder motor. This is what was in all K bikes up through the K1200LT.

There is also the K "Slant-4" which is the motor they use in the K1200 and 1300 S, R and GT models since 2006. It is a laterally mounted across the frame and slanted 55 degrees forward. It is also the first BMW engine to use a combined engine and transmission case and a multi-plate wet clutch.

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Last edited by DavidTaylor; Sep 15th, 2009 at 9:16 am.
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post #3 of 10 Old Sep 15th, 2009, 7:27 am
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Wink Re: Can someone PLEASE tell me what the different

This is somewhat similar to the Harley Davidson call outs.

The first were the Flatheads,
Then the Knuckleheads, with knuckle shaped rocker boxes,
Then the Panheads, with rocker covers that looked like pans,
Then the Shovelheads, with rocker covers that looked like shovels,
Then the Evolution engines, some call Blockheads.
Lastly, the newest V-rod engines, which are Harley's first water cooled, so are called the Showerheads!

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post #4 of 10 Old Sep 15th, 2009, 9:48 am Thread Starter
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Re: Can someone PLEASE tell me what the different

Mr Taylor, thank you for the info. It's now clear to me. Crystal clear.

And Mr Shealy, thank you for the history on our V-twin brothers!

Showerhead! Yikes!

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post #5 of 10 Old Nov 9th, 2010, 6:52 am
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Re: Can someone PLEASE tell me what the different

Quote:
Originally Posted by DavidTaylor
Boxer engines (opposed twins) -

Airhead is the old style 2 valve air cooled boxer engine made before 1994.
Oilhead is the 4 valve air and oil cooled boxer engine made from 1994 to around 2004
Chrome head was basically an Oilhead that was chromed in the R1200C and CLC lines
HexHead is the latest iteration of the Boxer engine in the R1200 series of bikes since around 2005, recognizable by the somewhat hex shape of the valve covers and heads.

There are also a couple of iterations of the K motors -

The "Flying Brick", which is/was a longitudinally mounted water cooled inline 3 or 4 cylinder motor. This is what was in all K bikes up through the K1200LT.

There is also the K "Slant-4" which is the motor they use in the K1200 and 1300 S, R and GT models since 2006. It is a laterally mounted across the frame and slanted 55 degrees forward. It is also the first BMW engine to use a combined engine and transmission case and a multi-plate wet clutch.
This thread was been dug up in another thread -- good summary, David! A couple nits:

The last of the airheads came off the line in 1996 (the 1995 models were the last in the US).

The oilhead was replaced by the hexhead starting in 2005 (GS and RT), but the oilhead continued for another year or so (R1150R).

The original K-bikes (flying bricks) were introduced in 1983; first available in the US in 1984.

The transverse in-line 4 is also commonly known as the "wedge-K."

For the new in-line 6, the voting over on the BMWMOA forum is currently leaning to "slant 6," apparently in tribute to the 1960's Dodge Dart

Mark Neblett
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post #6 of 10 Old Nov 15th, 2010, 2:38 pm
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Re: Can someone PLEASE tell me what the different

Don't forget about the Camhead. That's the new overhead cam engine that came out in 2010. It looks like the hexhead but only has two bolts on the valve overs instead of 4.
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post #7 of 10 Old Nov 15th, 2010, 10:48 pm
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Re: Can someone PLEASE tell me what the different

Quote:
Originally Posted by dshealey
This is somewhat similar to the Harley Davidson call outs.

The first were the Flatheads,
Then the Knuckleheads, with knuckle shaped rocker boxes,
Then the Panheads, with rocker covers that looked like pans,
Then the Shovelheads, with rocker covers that looked like shovels,
Then the Evolution engines, some call Blockheads.
Lastly, the newest V-rod engines, which are Harley's first water cooled, so are called the Showerheads!
I always lumped HDs all in as "Dick Heads", Did I miss a Memo

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post #8 of 10 Old Nov 18th, 2010, 7:03 pm
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Re: Can someone PLEASE tell me what the different

Well , It gets interesting when you get back to the Slash 2 , & the slash 3 . There was a lot of debate on what a slash 2 is , some say anything from 1955 to 1969 . Some say BMW dropped the slash 2 off there bikes starting in the 1960 line up , & so the slash 2 ended in 1959 ,The bikes just say R50 or R60 Or... I had a 1960 R60 , a 1963 R50 , & a 1965 R69S , & I called them all slash 2's , but what do I know .

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post #9 of 10 Old Nov 19th, 2010, 9:39 am
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Re: Can someone PLEASE tell me what the different

This, And anything older is an Airhead...The Bing Carburetors are the giveaway.



This is an Oilhead....When fuel injection started....


This is a Chromehead, Which is also an oilhead.. And it has Servo Brakes...


Anything newer than this is a Hexhead...And now the Cam Heads are out...
I don't own any of those so I can't show you a picture.. R1200RT is a hex head.
The newest RT's are Cam heads...
This is a K bike...And that's my wife so whatch what you say....


This is an F bike.


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post #10 of 10 Old Nov 19th, 2010, 11:26 am
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Re: Can someone PLEASE tell me what the different

Quote:
Originally Posted by JPSpen
This is a K bike...And that's my wife so whatch what you say....


Now that is one very beautiful lady!!!!



Your wife is attractive too.

Kalli
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