BMW K 1300 GT - Manual (Page 12)

BMW
Media
Information
10/2008
Page 12
The oil reservoir comes in a tank fi tted in the frame triangle behind the engine.
A dual oil pump operating at the rear of the crankcase and driven by a chain
from the clutch shaft draws in lubricant from the oil reservoir and feeds
the compressed oil fi rst to the oil fi lter (main fl ow fi lter). Easily and conveniently
accessible from outside, the oil fi lter is positioned on the lower left side of
the crankcase.
From there the compressed oil fl ows into the main oil pipe in the crankcase
and is spread out through internal holes to the lubricating points. The oil
fl owing back, in turn, gathers at the lowest point in the crankcase formed by
a bulge in the lower lid.
The second pump then delivers the oil fl owing back fi rst to the oil cooler
and from there to the oil tank, forming a refl ow system patented by BMW.
The larger oil cooler is integrated beneath the headlight in the aerodynamically
optimised front fairing for superior aerodynamics. In the interest of consistent
lightweight technology, fi nally, the oil cooler pipes are made of aluminium.
The oil level is checked conveniently and easily by means of a transparent
plastic pipe at the outside of the oil reservoir. This patented hose-like pipe also
serves to drain oil from the tank during maintenance. Capacity of the oil tank
is 4.2 litres or 0.92 imp gals.
An oil level warner is available as an option in conjunction with the likewise
optional on-board computer.
Perfect cooling concept for a good thermal balance.
The innovative but already proven cooling concept helps to give the power
unit of a K 1300 S optimum thermal balance. The fl ow of coolant is spread out
between the cylinder head and the cylinders by appropriately dimensioned
pipes at a ratio of 73:27.
The coolant fl ows crosswise through the cylinder head, entering the hotter
exhaust side when the it is at its lowest temperature. Precisely where the
thermal load is most sign fi cant, therefore, thorough cooling of the cylinder
head helps to quickly dissipate heat and ensures an optimum temperature
balance. The reduced fl ow of coolant through the cylinders helps to warm
up the engine even more quickly and thus reduces cold running wear as well
as friction, an advantage also in the interest of enhanced fuel economy.
The water pump fastened on the left side of the cylinder head is driven by the
intake camshaft. This specifi c arrangement and the direct injection of coolant