Radiator Leak - K-Bikes.com - Excellence in Motion
 
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post #1 of 8 (permalink) Old Apr 5th, 2014, 11:25 am Thread Starter
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Location: surrey, , England, UK
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Radiator Leak

I have had the right side plastics off to do other jobs for the past week. When I ran the engine, coolant started to seep from the right radiator. I intend to upload a photo.
What do you think?
All advice welcome

TIA

Mark
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post #2 of 8 (permalink) Old Apr 5th, 2014, 6:53 pm
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Quote:
Originally Posted by zxmark9r
I have had the right side plastics off to do other jobs for the past week. When I ran the engine, coolant started to seep from the right radiator. I intend to upload a photo.
What do you think?
All advice welcome

TIA

Mark
if your leak is from area where you have draw a RED box, then possibly just an O-ring.

This section of right radiator is where the removable thermostat is located, An O-ring seals cover (where hose is attached) from rest of radiator. See parts diagram from MAX-BMW:
http://www.maxbmwmotorcycles.com/fic...er=17111464876

This cover is held by a large clip and is difficult to re-installed with new o-ring and preferably a new thermostat. Everything is very tight in part tolerances there.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
John (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 96,000 miles)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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post #3 of 8 (permalink) Old Apr 6th, 2014, 2:37 pm Thread Starter
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Thanks

Quote:
Originally Posted by sailor
if your leak is from area where you have draw a RED box, then possibly just an O-ring.

This section of right radiator is where the removable thermostat is located, An O-ring seals cover (where hose is attached) from rest of radiator. See parts diagram from MAX-BMW:
http://www.maxbmwmotorcycles.com/fic...er=17111464876

This cover is held by a large clip and is difficult to re-installed with new o-ring and preferably a new thermostat. Everything is very tight in part tolerances there.
Thanks Sailor

Since my last post I have drained down and removed Radiator. I have pulled the large circlip and got the thermostat out. In a boiling pan of water the thermostat works, although it is slow to retract when cooled!
Are there any time values to work out whether or not it is working correctly.

TIA

Mark
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post #4 of 8 (permalink) Old Apr 6th, 2014, 8:20 pm
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Quote:
Originally Posted by zxmark9r
Thanks Sailor

Since my last post I have drained down and removed Radiator. I have pulled the large circlip and got the thermostat out. In a boiling pan of water the thermostat works, although it is slow to retract when cooled!
Are there any time values to work out whether or not it is working correctly.

TIA

Mark
BMW shop-manual does NOT include a time value, only a temp opening value of 85 celcius (185 F). So using a pan with water an a fairly precise cooking thermometer you can check opening temp. Slow or fast opening is subjective... BUT it should open BEFORE boiling point (100 Celcius).

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
John (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 96,000 miles)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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post #5 of 8 (permalink) Old Apr 9th, 2014, 12:33 pm Thread Starter
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Radiator Update

Just a quick update

New thermostat and O ring fitted, no more leaks.

Thanks for the help Sailor.

Mark
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post #6 of 8 (permalink) Old Apr 9th, 2014, 4:15 pm
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Quote:
Originally Posted by zxmark9r
Just a quick update

New thermostat and O ring fitted, no more leaks.

Thanks for the help Sailor.

Mark
Glad you got this fixed.
Next time show us some nice pictures of the steps to do this ;-)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
John (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 96,000 miles)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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post #7 of 8 (permalink) Old Apr 10th, 2014, 9:41 am Thread Starter
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Photos of the Job!

Quote:
Originally Posted by sailor
Glad you got this fixed.
Next time show us some nice pictures of the steps to do this ;-)

Photos of the Job to follow.

I will take some photos of the job when I re-do it! Yes you've guessed it, first ride out and it has started to leak

I have ordered a new O ring, thermostat cover and clip. Could take up to 2 weeks to come from Germany.

Mark
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post #8 of 8 (permalink) Old Apr 10th, 2014, 12:03 pm
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Quote:
Originally Posted by zxmark9r
Photos of the Job to follow.

I will take some photos of the job when I re-do it! Yes you've guessed it, first ride out and it has started to leak

I have ordered a new O ring, thermostat cover and clip. Could take up to 2 weeks to come from Germany.

Mark
Not a common job on the K1200, but it has been mentioned a few times during last 10 years that the thermostat cover is a bit tricky to install (with O-ring).

Do NOT forget that you may also have a case of:
1) cracked thermostat cover
OR
2) Cracked Radiator near thermostat cover

An hairline crack is not easy to detect visually.
Awaiting pictures....

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
John (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 96,000 miles)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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