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Spark Plug Change - tricky little devils

Discussion in 'Servicing & Maintenance' started by Boxerboy55, Sep 5, 2017.

  1. Boxerboy55

    Boxerboy55 Well-Known Member

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    As part of my leisurely DIY 2 year, 12,000 mile service, today was the turn of the spark plug change, after my new slimline 14mm socket arrived. Cheap as chips online purchase.

    Just when I thought I had everything in the toolbox, I found that the deep plug spanner that fitted a GS12 was far too big (16mm) to fit the RS.

    I knew I had the coil puller tool. Which is where I came unstuck, as the standard BM crash bars get in the way of the coil puller. No problem. A quick hacksaw cut, 2 Wee holes and a piece of string and I have a new Slimline Coil Puller tool. Not patented so feel free to copy :)

    Pulled the RHS out no problem, but the LHS would not clear the crash bar without slackening the 3 crash bar mounting bolts. Then I was home and dry for a quick plug change. The old plugs were in reasonable shape - well the bike was running perfectly a few days ago.

    I spun the new plugs in very carefully with my fingers to ensure that no threads were getting crossed as these must be the deepest plugs I've ever met. With no torque wrench that can deliver 12 Nm accurately, the final tightening was done with my calibrated right hand. No grunting. Probably less than a quarter turn from finger tight to TIGHT. In fact I backed them out and re-tightened them a second time to ensure I got the crush washers right. IMG_7438.JPG IMG_7440.JPG IMG_7442.JPG IMG_7441.JPG IMG_7443.JPG IMG_7444.JPG
     
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  2. vat

    vat Active Member

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    Nice pictures was there any sign anti seiz on the threads of the original plugs
     
  3. Boxerboy55

    Boxerboy55 Well-Known Member

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    Oh no, no, no, no!
     
  4. boxerboy

    boxerboy Well-Known Member

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    Wow, surprisingly deep plugs! Thanks for sharing.
     
  5. Lee

    Lee Well-Known Member

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    There was no anti-sieze on our plugs and the BMW Repair Manual does not recommend using any when installing new plugs.
     
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  6. CoOlSlY

    CoOlSlY New Member

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    How many spark plugs on the 1200RS... 2 or 4?
     
  7. CoOlSlY

    CoOlSlY New Member

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    My dealer sold me 4 spark plugs but I suspect it's two on the R1200RS but i'm sure somebody will tell me how many there is on the RS if it's two or 4...
     
  8. Boxerboy55

    Boxerboy55 Well-Known Member

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    Honest I only changed 2
     
  9. MrVvrroomm

    MrVvrroomm Well-Known Member

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    There are 4 plugs between 2 RS's.

    A monkey could change plugs on a wethead BMW
     
  10. boxerboy

    boxerboy Well-Known Member

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    ....and how many tyres?
     
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  11. MrVvrroomm

    MrVvrroomm Well-Known Member

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    I have a shitload of tires in my garage, not a single tyre
     
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  12. CoOlSlY

    CoOlSlY New Member

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    Bravo to my dealer who sold me 4 plugs stating there were 4 (and bravo to me thinking it was like the GS)... :(
     
  13. CoOlSlY

    CoOlSlY New Member

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    Since people seem to be laughing at me, is it 2 or 4?
     
  14. MrVvrroomm

    MrVvrroomm Well-Known Member

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    It is 2. 1 starboard. 1 port.

    This is the same on all BMW wet heads
     
  15. Aussie Import

    Aussie Import Well-Known Member

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    Sometime after the R1100 motor was introduced in 1993 there was an upgrade, and I think it may well have been when the 1150 version was introduced. That had 4 sparkplugs in total, the new location was "underneath" - that is accessible from below the heads. The LC motor has reverted to 2 plugs.
     
  16. Lee

    Lee Well-Known Member

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    Are you calling me a monkey :D
     
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  17. CoOlSlY

    CoOlSlY New Member

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    Thank's for the clarification. I really thought it was like the "old" GS video I had found that was showing 4 plugs, surprised my dealer sold me 4 plugs when I asked for plugs for my R1200RS 2016... It's in those moments I tell myself, forums are great!
     
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  18. MrVvrroomm

    MrVvrroomm Well-Known Member

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    only face to face my friend
     
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  19. Bravo

    Bravo Plenty in the tank. Contributor

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    Don't bring me into it.
     
  20. Aussie Import

    Aussie Import Well-Known Member

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    If the dealer gave you 4 plugs, you may find they are the "wrong" ones, either because of the diameter or the length. The RS plugs are buried right in the head. You need a special tool to extract the coil / cap assembly (and you have to unclip the low tension wires before you try to extract. You then need a thin wall socket with a fairly long extension to get in there.
     
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