HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
525rider

08 YZ450 Oil level

3 posts in this topic

Is it normal, that after a few days oil leaks back to crankcase and there is nothing on dipstick?

Share this post


Link to post
Share on other sites

Yes it is. This is true of all dry sump systems except some F1 cars that have actual shutoff valves on the oil feed line. There is a low pressure check valve in your YZ to stop the drain back from occurring very quickly, but the oil eventually leaks through around the pump shaft.

This is also why the manual says that to check the oil level, you must first run the engine for a minute or two before hand. You should also wait 40 seconds after shut dowm before pulling the dipstick to avoid having any bubbles still working their way up the return passage coming up out of the stick hole and making a mess.

Share this post


Link to post
Share on other sites
Yes it is. This is true of all dry sump systems except some F1 cars that have actual shutoff valves on the oil feed line. There is a low pressure check valve in your YZ to stop the drain back from occurring very quickly, but the oil eventually leaks through around the pump shaft.

This is also why the manual says that to check the oil level, you must first run the engine for a minute or two before hand. You should also wait 40 seconds after shut dowm before pulling the dipstick to avoid having any bubbles still working their way up the return passage coming up out of the stick hole and making a mess.

Thanks

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0