Hot / Cold check

[paiseh]

hi all, is there a cold or hot check for bikes regarding the EO level?

 

becoz when hot, EO will expand and level is not accurate. i read a few bike's manual, they only state check when eng is cooled down.

 

 

P/S: i do those tank EO level checks every morning. cold check first den hot check. they are fairly accurate.

[Phang]

If the microscopic difference in oil level due to engine oil expansion/contraction is significant. You might want to consider other factors that may affect the oil level/accuracy. Followings are some I could think of:-

 

- Ground levelling, do you park your bike on a perfect level floor when you check the oil level?

- Tyre air pressure, tyre wear, suspension pre-load setting, suspension wear, additional load (rear box), fuel in the tank will alter the oil level in the engine sump by a few micrometer at the point of the dip stick/sight glass.

 

Cold engine will have a higher oil level in the oil sump/pan because engine oil that pumped to the various parts in the engine will drip/flow back to the bottom of the engine due to gravity when the engine is stop running.

 

If the manual states checking the engine oil level when hot/cold or 10 minutes after stopping a warm engine, I will follow because that will give a more accurate reading.

 

[paiseh]

ya, i guess for tanks it is significant. coz i top up abt 1litres every 3 months