Cooling question

[Deleted account 250319001]

Whilst sitting in heavy traffic in Paris last year my bike got so hot I had to pull over and allow it to cool down. My mates Jap bike handled this with ease as the fan cut in.
So, is it possible, or are there any reasons why I cant fit a fan behind my oil cooler?
More to the point, why don’t BMW fit a Fan?

 

[davegs]

overheating

I have ridden my bike 1150 gs through deserts in Utah, Nevada Death Vally and Morocco (as have many others, and these places are a bit hotter than Paris!) and never had a problem with over heating. How much higher did the bars go on the tremprature gauge?, is your oil cooler full of crap? is your oil level correct. ( oil is used as a coolent for the engine as well as the normal cooling / lubrication). Hows the ignitition timing.
dave gs.

 

[ukaloon]

I should think that it was the sitting in heavy traffic bit that was the problem, due to the lack of air flow.
I can't see any reason why you couldn't fit a small fan behind the oil cooler, but I'm not conviced that it'd make much of a difference
I suppose you'd have to fit it and then replicate the conditions to find out. Rather you than me mate.

 

[alimey4u2]

I had the same problem with a 1100RT while stuck in traffic outside Atlantic Beach, North Carolina on a hot summer day..... I just switched the engine on & off whilst progressing....

 

[Deleted account 250319001]

I have ridden my bike 1150 gs through deserts in Utah, Nevada Death Vally and Morocco (as have many others, and these places are a bit hotter than Paris!) and never had a problem with over heating. How much higher did the bars go on the tremprature gauge?, is your oil cooler full of crap? is your oil level correct. ( oil is used as a coolent for the engine as well as the normal cooling / lubrication). Hows the ignitition timing.
dave gs.

As has been said, it's not the outside temp that matters, just the static air movements.

 

[(RIP) Kaister]

As has been said, it's not the outside temp that matters, just the static air movements.

theres something in the back of my mind about air cooled engines dont actually have to be moving through the air to dissapate heat.

however, it doesn't make sense though - and i queried it at the time - i was at college - but i think it was explained with enough justification then to shut me up.

it would depend on design surface area, relative temps and some other stuff.

maybe someone else will fill in the gaps.

 

[GPLongford]

theres something in the back of my mind about air cooled engines dont actually have to be moving through the air to dissapate heat.

I thonk I'w heard something similar...

I got caught in "stau" in Germany with my Intruder 1400. It was HOT and traffic allmost at zero speed. Engine got so hot it was painful to have my legs on the footpegs and after some time my clutch fluid boiled so I lost the clutch!

Happily I could go off the road into a construction site just there!

 

[Steptoe]

theres something in the back of my mind about air cooled engines dont actually have to be moving through the air to dissapate heat.

.

Convection - The bigger the cooling fins, the better the heat dispersion. As the hot air rises/gets drawn off, cool air gets sucked in. Only problem is the oil cooled engine of the GS range have bugger all cooling fins.

The police RT's have a cooling fan, the temp sensor is part of the oil drain plug.

It's an optional extra on bikes sold on hot climates . Fit nicely into the fairing behind the oil cooler. The housing and fan wouldn't fit in the space available on a GS.