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Thread: Coolant replacement

  1. #16
    Quote Originally Posted by craigjv4 View Post
    Sorry I didn't get back to the forum sooner but I was in the garage - changed the oil and coolant, flushed the brake fluid F & R, and dropped the final drive. I should get the moly powder (cost 9 bucks) tomorrow to make my moly paste to coat the splines and will change rear gear lube.

    The vacuum refiller I made worked like a charm. I'll take a pic of it (it's not pretty! LOL) but it's too late for a video. Sorry.
    I used my hand pump Mityvac, a soft rubber stopper #6 size, a few hoses, and an old CO2 kegerator distribution manifold I had from when I was a homebrewer. Just stuff I had laying around. I was able to refill without removing anybody work other than the access door.

    The BMW cd manual calls for minimum -.8 bar (-24 inHg) vacuum. The hand pump pulled about -28 to -29 inHG. Before opening the coolant line to fill, I let the apparatus sit for about 15 minutes to see if it held vacuum. No problem.

    I'ts surprising to see how little fluid actually drains out from the rads and head. There is only about 1.5 l of coolant in the entire circuit according to the manual.
    So barely a "wethead"
    .
    OK, we'll start calling it a "damp head".
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  2. #17
    Addicted to curves azgman's Avatar
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    A step by step description of your process would be most helpful to folks on this forum. Thanks in advance!
    MOA #107139
    RA #28511

  3. #18
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    1. Drain the cooling system as described in the service manual.
    2. Close the left valve. Open the right valve. Insert the correct tube (labeled in pic) in the gallon jug of coolant which is hung above the bike. I hung it from the door opener.
    3. Use the Mityvac to suck the coolant into the tube from the rad filler/plug end. Close the right valve when full.
    4. Push the soft rubber plug into the rad filler neck. The size of this plug sealed against the flat bottom of the neck so I did not have to pinch-off the overflow hose.
    5. Connect the Mityvac to the correct tube (labeled) and open the left valve.
    6. Operate the Mityvac to pull a vacuum on the cooling circuit. Close the left valve and let the system sit for a bit to assure the vacuum holds.
    7. I held the plug with one hand while operating the Mityvac to keep the plug seated until the vacuum took over. I later learned this was unnecessary but it couldn't hurt to hold it tight against the neck.
    8. Slowly open the right valve and the coolant will be sucked into the circuit.
    9. Let it run until the coolant stops flowing.
    10. Drink beer
    11. As it says in the BMW manual... you may have to top up the coolant after removing the plug. I had to add maybe an ounce.

    I should have trimmed up the length of my tubes to better fit where the valve manifold was located by the right-side bar grip but this is how I cobbled it together this morning and I didn't feel like changing it. A #6.5 or #7 rubber plug may fit easier but then you'll probably have to plug the rad overflow line. This is a #6 plug actually inserted upside down; but this is the plug I had. You'll find these plugs at any decent homebrew shop. My tubes were so snug fitting on the barbs, I only needed one hose clamp.




    vacuum.jpg
    Last edited by craigjv4; 03-26-2020 at 02:58 AM.
    2015 GSA

  4. #19
    Addicted to curves azgman's Avatar
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    Which brand should I use for step #10?
    MOA #107139
    RA #28511

  5. #20
    Registered User cap's Avatar
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    Quote Originally Posted by craigjv4 View Post
    1. Drain the cooling system as described in the service manual.
    2. Close the left valve. ...
    Well done! Thanks for posting.

    Cap

  6. #21
    Debbie's Servant Lee's Avatar
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    Thanks Craig.
    Lee
    2016 R1200RS
    MOA # 30878
    Past BMW Bikes: 2011 K1300S, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  7. #22
    Registered User gsinnc's Avatar
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    Quote Originally Posted by azgman View Post
    A step by step description of your process would be most helpful to folks on this forum. Thanks in advance!
    My process is similar but a little different

    1. Start bike
    2. Ride to dealer
    3. Ask for Coolant Flush Service
    4. Eat a donut and have free coffee
    5. Get back on bike
    6. Ride home
    Ed Apelian
    Motorcycling is my passion because golf is far too dangerous!
    2018 R1200GS - Light White !
    2016 R1200RT- Platinum Bronze

  8. #23
    Registered User alegerlotz's Avatar
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    Quote Originally Posted by gsinnc View Post
    My process is similar but a little different

    1. Start bike
    2. Ride to dealer
    3. Ask for Coolant Flush Service
    4. Eat a donut and have free coffee
    5. Get back on bike
    6. Ride home
    You forgot the part where you pay the big bill.
    2016 R1200RT
    2007 KTM 450 XC-W (10/17 - 5/18)
    2005 R1200RT (2/2015 - 12/2016)
    1985 Yamaha XJ 700 Maxim (7/1989 - 9/1991)

  9. #24
    Registered User gsinnc's Avatar
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    Quote Originally Posted by alegerlotz View Post
    You forgot the part where you pay the big bill.
    Yes ... well pay the bill ... my dealer is pretty fair so probably won't be all that bad. But hey ... free coffee and donuts!

    And no tools to buy either
    Ed Apelian
    Motorcycling is my passion because golf is far too dangerous!
    2018 R1200GS - Light White !
    2016 R1200RT- Platinum Bronze

  10. #25
    Registered User easy's Avatar
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    Quote Originally Posted by gsinnc View Post
    My process is similar but a little different

    1. Start bike
    2. Ride to dealer
    3. Ask for Coolant Flush Service
    4. Eat a donut and have free coffee
    5. Get back on bike
    6. Ride home
    You must be more specific.

    What type of donut did you eat?

    E.

  11. #26
    Registered User gsinnc's Avatar
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    Quote Originally Posted by gsinnc View Post
    My process is similar but a little different

    1. Start bike
    2. Ride to dealer
    3. Ask for Coolant Flush Service
    4. Eat a donut and have free coffee
      Preferably Chocolate frosted or Old Fashioned
    5. Get back on bike
    6. Ride home

    Quote Originally Posted by easy View Post
    You must be more specific.

    What type of donut did you eat?

    E.
    Sorry .... specificity added
    Ed Apelian
    Motorcycling is my passion because golf is far too dangerous!
    2018 R1200GS - Light White !
    2016 R1200RT- Platinum Bronze

  12. #27

    coolant change

    I'll bet the tools to do this will cost less than the dealer charge so its a win-win to do yourself. You learn something new and have equipment that has multiple uses. For those that keep their bikes the next fluid change is basically free.

  13. #28
    Registered User 36654's Avatar
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    Quote Originally Posted by khafner View Post
    I'll bet the tools to do this will cost less than the dealer charge so its a win-win to do yourself. You learn something new and have equipment that has multiple uses. For those that keep their bikes the next fluid change is basically free.
    Even if the coffee was bad and they didn't have donuts...........I'll let the service dept do it.

    Reasons
    1) Lazy
    2) Lazy
    3) Lazy
    4) It's a decent ride to my dealership
    Cave contents: 16 R12RS, 13 Toyota Tacoma, 03 Simplicity Legacy, 97 Stihl FS75, Dewalt DW625 & SawStop PCS175
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  14. #29
    Registered User gsinnc's Avatar
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    Quote Originally Posted by 36654 View Post
    Even if the coffee was bad and they didn't have donuts...........I'll let the service dept do it.

    Reasons
    1) Lazy
    2) Lazy
    3) Lazy
    4) It's a decent ride to my dealership
    5) And it's only once every 4 years (as recommended by my dealer)
    6) In THIS environment I am trying very hard to go the extra mile to support my local dealer
    Ed Apelian
    Motorcycling is my passion because golf is far too dangerous!
    2018 R1200GS - Light White !
    2016 R1200RT- Platinum Bronze

  15. #30
    Watch This!!! junkjohn's Avatar
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