K11 Owners Group

dwerbil · Posted: Sat Jul 23, 2016 10:54 am Post subject: '93 KRS coolant drip....

Noticed a leak here this morning from a "weep hole"?....

I take it this means a bad water pump seal?
_________________

93 K1100RS ~ 2004 R1150RT ~ 84 RS ~ 78 R100/7 ~ 65 R60/2
Click for pics
Randy at Round Rock, Texas

Flying Duck · Posted: Sat Jul 23, 2016 8:11 pm Post subject:

Or a corroded shaft in the oil/water pump.
_________________
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

dwerbil · Posted: Sun Jul 24, 2016 6:18 am Post subject:

Flying Duck · Posted: Sun Jul 24, 2016 9:16 am Post subject:

Last time I checked the parts were available.

There's several posts around (including on IBMWR and a Brit vid on YouTube) on replacing the seals.

I replaced the seals on my LT a few years ago. Kind of a PITA but not too bad.

The reason I mention the pitted shaft is that I've seen a couple of bad ones on old K100s I've parted. My LT's was fine so my guess would be that your shaft is probably good too but it is something to check when you have things apart.
_________________
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

SugarHillCTD · Posted: Sun Jul 24, 2016 10:37 am Post subject:

Recently had the same problem. Found that Motobins in England had what I needed at the best price.

They have a water/oil pump rebuild kit as well as new pumps.

Unsure of doing the rebuild properly, I bought a new one since I was doing a BBG and have a 50cc in September. I didn't want to find a new leak due to my incorrect rebuild.

I also did buy the rebuild kit to try on the pump I had removed.

https://www.motobins.co.uk/bmw-parts.php?model=K%20Series&bikeref=K100
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

dwerbil · Posted: Sun Jul 24, 2016 12:59 pm Post subject:

You guys are terrific, most helpful, thanks so much!

With this drip, is there danger of water getting into the oil system?
_________________

93 K1100RS ~ 2004 R1150RT ~ 84 RS ~ 78 R100/7 ~ 65 R60/2
Click for pics
Randy at Round Rock, Texas

Flying Duck · Posted: Sun Jul 24, 2016 1:07 pm Post subject:

dwerbil · Posted: Mon Jul 25, 2016 6:23 pm Post subject:

SugarHillCTD · Posted: Mon Jul 25, 2016 7:05 pm Post subject:

dwerbil · Posted: Tue Jul 26, 2016 7:16 am Post subject:

Any reason one couldn't try using a radiator stop-leak product like Bardahl?
_________________

93 K1100RS ~ 2004 R1150RT ~ 84 RS ~ 78 R100/7 ~ 65 R60/2
Click for pics
Randy at Round Rock, Texas

Scott_Anderson · Posted: Tue Jul 26, 2016 7:52 am Post subject:

My guess is that it wouldn't work, if it actually is the shaft seal.
Most products like that are designed to plug a pin-hole like leak where the material around it isn't moving.......unlike a pump shaft seal.
Plus it tends to collect in the smaller waterways(and radiator pressure cap) and can(not always) sometimes actually reduce your water flow through the radiator as well, and these bikes don't have that much radiator to begin with.......

Personally I wouldn't do it, but that's just me.
You asked, I gave my opinion.
_________________
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)

SugarHillCTD · Posted: Tue Jul 26, 2016 10:08 am Post subject:

I strongly agree with Scott.
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

Flying Duck · Posted: Tue Jul 26, 2016 11:54 am Post subject:

There are additives out there that swell rubber seals that might work.

However, it's still just a Band-Aid and not a real fix.

Best to do a proper repair.
_________________
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

dwerbil · Posted: Wed Jul 27, 2016 6:24 pm Post subject:

I appreciate the thoughts. The bike had a over-heating problem a few months ago and am needing to get it on the road to sell it. I am not able to ride a RS like I used to. My wrists and lower back and age seem to be catching up on me.

The cooling fan now is needing replacing. I jumpered 12 volts to the fan itself to check it (it didn't come on at high heat last time). The fan motor revved up rpm for a second then did sort of a bearing squeal sound then quit. Nothing now. Sounds like it's toast. So will need to change it out. I see on a search that there's a $60 fan substitute I think I'll try unless someone here has a used one they'd like to get rid of.

The fan didn't work when I bought the bike and replaced it with a used one at that time. This was some years and 30k miles ago.
_________________

93 K1100RS ~ 2004 R1150RT ~ 84 RS ~ 78 R100/7 ~ 65 R60/2
Click for pics
Randy at Round Rock, Texas

Grunter · Posted: Wed Jul 27, 2016 6:37 pm Post subject: Water leak.

This leak from the base of the pump will not cure itself and will only get worse. Any sort of sealant including that designed to make the seal swell will also fail miserably. If the shaft is corroded which is almost certainly the reason for the leak it will destroy any sort of sealant in a very short time.

Far better to bite bullet and go for a rebuild kit or one that had already been rebuilt than leaving it to chance, K1100's get very hot very quickly even in the temperate climate of UK, so with the higher temps in places like Texas a sudden loss of coolant leading tom oil contamination as well, could lead to a very expensive seizure of the engine.

Ask your self.... which is the cheaper option? .
_________________
1997 K1100LT
1994 R1100RS

Flying Duck · Posted: Wed Jul 27, 2016 6:58 pm Post subject: Re: Water leak.

dwerbil · Posted: Sat Jul 30, 2016 1:26 pm Post subject:

Thanks, Grunter.....won't be going that sealer route.
Came across a youtube that helps to see a bit what's involved although it's based on a water pump removal from a K1100LT. Will crack out the Clymer when rebuild parts come in.
https://www.youtube.com/watch?v=_CBtaioRMx0
_________________

93 K1100RS ~ 2004 R1150RT ~ 84 RS ~ 78 R100/7 ~ 65 R60/2
Click for pics
Randy at Round Rock, Texas