K11 Owners Group

heatmizr · Joined: 25 Jan 2010 Posts: 16 Location: Charlotte NC

Quick question guys,
I WAS all done tuning up my friend's '96 K1100rs last weekend after replacing the air filter, but while the side panel was off I noticed the radiator fan looked a bit funny... Long story short the fan blades were no longer connected to the fan motor shaft! It was just spinning freely on the shaft.
Got a replacement on the way (Thanks MaxBMW!) and was wondering, is it even possible to replace the fan without completely removing the radiator? (and draining coolant). I have seen on other bikes where the rad is "hinged" at the top mounts and can be pull forward some for maintenance. Any hope?

Of course the manual just says "remove radiator"...
As always, thanks from the newb.
_________________
Todd Glasier in Charlotte, NC
1996 k1100rs (on loan)
2002 RC1
2000 VFR

Flying Duck · Posted: Wed Mar 17, 2010 11:43 pm Post subject:

Did you buy a new fan for $225? Shocked

It's a good thing you caught it as the fan can end up drilling a hole in the radiator in some cases.

It MIGHT be possible but will be tricky if it is.

You can try this but it most likely won't be a piece of cake with the hoses attached:

Remove the two 8mm nuts holding the filler assembly to the frame and get that free.

Undo the bolt at the top.

Lean the radiator forward and see if you can get to the two 4 or 5mm Allen bolts at he bottom. If you can't get to those then give up and drain the system.

If you got those bolts out then remove the metal collars from each side of the top mount and get the fan top mount out of the rubber.

Assembly in the reverse of disassembly.

Coolant and distilled water are inexpensive.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

Scott_Anderson · Posted: Thu Mar 18, 2010 7:13 am Post subject:

jr'sbmw · Big Brick Rider Joined: 04 Nov 2008 Posts: 54 Location: Fl

+1 on finding the problem. About 4 yrs ago, I did a two day ride from FL to WI with my 97LT. Pulled in by family near Green Bay and had a small amount of antifreeze dripping on the ground. The bad of it was the loose fan did take out the radiator. The good news was I ordered the parts, fixed myself, and it didn't happen in downtown Chicago or in Canada where I headed later!!!

heatmizr · Joined: 25 Jan 2010 Posts: 16 Location: Charlotte NC

Got it - Muchos Gracias!
Yup I was looking in there and had a thought I might be able to pull it off that way. First I need to get the rest of the bodywork off, which is a job in itself! Geeze there are a lot of pieces..

The owner actually ordered a new fan, I think it was closer to $275, not sure where she ordered it from.
Yes, she said the original rad DID get drilled by the fan motor. I think if she stopped crashing this bike then things would stay out of each others' way better Rolling Eyes

_________________
Todd Glasier in Charlotte, NC
1996 k1100rs (on loan)
2002 RC1
2000 VFR

acftfliehr · Big Brick Rider Joined: 05 Nov 2007 Posts: 62

Went to a swap meet the other day, and a local guy had 4 3 core 85 K100 radiators for sale, I'm going to pick up at least 2 anyone else interested?

Send me a PM if you are...

Dave

heatmizr · Joined: 25 Jan 2010 Posts: 16 Location: Charlotte NC

Well this was a pretty easy repair.
WHY did they arrange the filler cap under the fuel tank? To top off coolant you need to remove the tank??
I bypassed that "engineering" and removed hose clamp up under there and pulled the filler hose out to the side and filled it that way.
_________________
Todd Glasier in Charlotte, NC
1996 k1100rs (on loan)
2002 RC1
2000 VFR

Flying Duck · Posted: Sun Apr 04, 2010 10:14 pm Post subject:

heatmizr · Joined: 25 Jan 2010 Posts: 16 Location: Charlotte NC

And if you are on an epic cross-country journey, and your bike develops a small coolant leak, you're going to have a lot of fun trying to add any coolant while trying to nurse it home!
_________________
Todd Glasier in Charlotte, NC
1996 k1100rs (on loan)
2002 RC1
2000 VFR

lrome48 · Posted: Sat Apr 17, 2010 6:46 pm Post subject:

Flying Duck · Posted: Sat Apr 17, 2010 8:35 pm Post subject:

No need to remove the side panels. Just reomve the seat, unclip the tank and pull it back to expose the filler.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

Scott_Anderson · Posted: Sat Apr 17, 2010 8:43 pm Post subject:

Flying Duck · Posted: Sat Apr 17, 2010 8:57 pm Post subject:

The battery side covers need to be removed but not the inner knee panels/buckets. Same for RS and LT.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

Stoked Steve · Posted: Sat Apr 17, 2010 9:06 pm Post subject:

Scott_Anderson · Posted: Sat Apr 17, 2010 9:37 pm Post subject:

Steve, looking at your picture(specifically the underside of your tank) it looks like you haven't been converted to the air accumulator for your overflow vent and rain drain.
Looking at that tubing connected together you could end up with rain water down in the crankcase.(or where ever the tubing goes that was connected to that check valve.)
_________________
Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

lrome48 · Posted: Sat Apr 17, 2010 10:44 pm Post subject:

hfxrzw · Mad Brick Rider Joined: 30 Jan 2009 Posts: 78

Further - no insulation underneath the tank???? The two hoses under your tank should not be connected. One is the breather/overflow, the other is the rain water drainline that starts on the left side of your filling lid.
_________________
Cheers, Rene

Greetings from Florida.

BMW K100 '85