i kinda assumed used engine oil is rather black in colour. on doing an oil change on my 748, the oil looks pretty much like mud!! is this normal??
Sounds like its getting water from somewhere, if you have any of the old oil then heat a pan or roasting dish and put a couple of drops of oil on it, if it crackles then there is water in the oil, if it just sits there and gets hot then its fine. Suggest a high oven heat.
Through the filler? :biggrin: My Mates CBR600 did this to his coolant: Blown o-ring in the oil cooler, like an element the oil passed through surrounded by coolant, this had the consistancy of chocolate milkshake! Your OIL is thick, muddy? Any pics? If the head gasket etc blows then the oil is under greater pressure than the coolant, so should contaminate the coolant, not the other way round? When was the oil last changed? Do you do a lot of short runs? Does the bike take ages to get up to temperature?
Thick and muddy, yes. like chocolate milkshake!! oil last changed about 600 mile ago. i commute 7 miles to and 7 miles from work. she takes around 10 mins to get up to temp. would too much oil in the engine cause this??
Not a case of too much oil, not enough heat methinks? What heat is it reaching, do you have a deg.C readout on the clock? I would recommend taking the long way home to get some SERIOUS heat into the oil... milky emulsion is caused by short low-temp runs in cold conditions.
If it's not overheating count out head gasket, That just leaves the water pump seal in the side casing.
i must admit that i do the 7 mile run most days but doesn't get a full chance to get up to temp. is it true that after a long run, taking the filler cap off helps evaporate any moisture?
Yes but remember to put cap back on prior to starting, if my oil was in that state I would change it before it causes any more damage.
+1! I kept my filler in an aerosol lid with a loop of ductape underneath it to stick it to the petrol filler cap so I always remembered to replace it... Get a filter if you havnt got one (I think some Peugeot filters will fit if you havnt got time to go to a bike shop?), go out and get the bike PROPER hot, drain oil & replace with some new oil asap!
