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Discussion Starter #1
I have a 2003 LTC. When I first got the bike with 13K on it, I noticed that fluid was leaking from under the bike. Investigation showed it to be the little bottle under the seat, what ever it is called with coolant in it.
Anyway, the system was overfilled the dealership said and fluid was drained from the system.
Now at 15K it is doing the same thing, the system seems to be "overfilled" but I have added no fluid.
Is there some restriction in the system that is not allowing the fluid to return to the radiators? Do you think that the thermostat needs replacing?
Has anyone had this happen before?
Thanks for the advice!
:confused:
 

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Check the easiest first, I would start with a new radiator cap.
 

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I have a 03 LTE. check with your dealer, there was a recall on radiator caps. mine was replaced aprox 2 yrs ago under warr.
 

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Discussion Starter #4
danbrown said:
I have a 03 LTE. check with your dealer, there was a recall on radiator caps. mine was replaced aprox 2 yrs ago under warr.
I called the local dealership, Orlando BMW and was told that there was never a recal on the radiator cap. But, I am going to start with putting a new cap on it. Does anybody know the pressure of the OEM cap?
 

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Hollywood said:
I called the local dealership, Orlando BMW and was told that there was never a recal on the radiator cap. But, I am going to start with putting a new cap on it. Does anybody know the pressure of the OEM cap?
I think it is 21 lbs. I bought a 16lb one as my dealer ( BMW of North Houston) did not stock this. Took 2 weeks to order it in. Meant to replace it last week when i had the plastic off.

dan
 

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Discussion Starter #6
DanMartin said:
I think it is 21 lbs. I bought a 16lb one as my dealer ( BMW of North Houston) did not stock this. Took 2 weeks to order it in. Meant to replace it last week when i had the plastic off.

dan
I don't have a huge understanding of how this should work... Is it better to go with a higher or lower pound rating on the cap? Does a lower rating mean that the system will open sooner? It stays pretty hot in Florida.
What say you?
 

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Hollywood said:
I don't have a huge understanding of how this should work... Is it better to go with a higher or lower pound rating on the cap? Does a lower rating mean that the system will open sooner? It stays pretty hot in Florida.
What say you?
Higher pressure gives you a higher boiling point. I've been running the 16lb cap for 6-8 months. Have noticed no difference in running temp and no evidence of boilover. I still intend to change back to the 21lb cap if this "forgetfullness" ever lets go.

dan
 

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Discussion Starter #8
Hollywood said:
I have a 2003 LTC. When I first got the bike with 13K on it, I noticed that fluid was leaking from under the bike. Investigation showed it to be the little bottle under the seat, what ever it is called with coolant in it.
Anyway, the system was overfilled the dealership said and fluid was drained from the system.
Now at 15K it is doing the same thing, the system seems to be "overfilled" but I have added no fluid.
Is there some restriction in the system that is not allowing the fluid to return to the radiators? Do you think that the thermostat needs replacing?
Has anyone had this happen before?
Thanks for the advice!
:confused:
What would be the best coolant to use in the LT?
 

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If you are just topping it off, I'd top off with the same color from the BMW shop. Some coolants are not compatible with others. However if you are going to drain and replace, I'd consider the Propylene Glycol coolant from Amsoil.

This coolant is similar to the Propylene Glyclol coolant Engine Ice, but costs half as much. Propylene Glycol has a much lower toxicity to pets and children than Ethylene Glycol and requires no special disposal procedures. It is compatible with all other major ethylene and propylene coolants if you have to top off with another coolant far from home. It is recommended for motorcycles by Amsoil and can be used up to 7 years or 250,000 miles. It is what I used for the last few years I owned my 137,000 mile 2000 K1200LT and what I will use for my first coolant change in my 2006 K1200LT. It has been sold in several Houston area motorcycle shops for the past 3 years.
 
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