Oil-pressure R80GS
I have to do a search but found no answers…
My bike is a BMW R80GS Basic with 153.000 km on the clock.
It has an oil-pressure meter and it used to indicate somewhere between 4 and 5 bar at normal engine-temperature. At low revs or at idle it will now drop to 1.5 bar, maybe to 1 bar if the engine is really hot. When driving in higher speeds (80km/h) the pressure normally creeps above 4 bar. This change has happened slowly during the last 60.000 km but it doesn’t look like it has become worse for a while.
So the big question is: How far can the pressure drop before it gets dangerous?
I guess I have to open the engine, is there anything special I should be looking for other then?
-Oil pump
Check clearance.
-Metal-filter in oil-sump:
Should be okay. If it’s clogged it would have been worse on high RPM.
-Main-bearings and conrod-bearings
Might be worth changing them if I check them anyway
-Maybe the relief spring behind the camchain?
I’m not sure if this spring is before or after the pressure transmitter.
The oil I use is mineral oils of different brands, 10W40 or 20W50 dependent of temperature.
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