ebeeby
Member
I changed the final drive grease last year. Since it showed low (below lower thread) upon draining, I looked up the exact amount required in the BMW shop manual which is .25L or about 8.7 ounces. It took some doing (driving, re-checking) to get all that in the final drive as that grease is heavy and takes time to settle in, but I did it.
In June this year on a 40 mile run, I burped out grease from the top vent, enough to get on the tire not just some spots on the rim. I wiped it down, and I don't think it burped again on return trip. Last night, 10 mile run, it burped out a small amount, just enough to show on the outside of the final drive. I pulled the fill plug and grease was below lower thread. To determine how much below, I added grease and it took about 1 ounce to come up to the lower thread.
Question: Since in the last 15 years I probably never had the exact full amount in the final drive until the change last year (I did other changes, but just filling to lower thread, turning rear wheel, adding a little etc., not forcing 8.7 ounces in) is it just burping to its preferred level which appears to be 7-7.7 ounces?
In June this year on a 40 mile run, I burped out grease from the top vent, enough to get on the tire not just some spots on the rim. I wiped it down, and I don't think it burped again on return trip. Last night, 10 mile run, it burped out a small amount, just enough to show on the outside of the final drive. I pulled the fill plug and grease was below lower thread. To determine how much below, I added grease and it took about 1 ounce to come up to the lower thread.
Question: Since in the last 15 years I probably never had the exact full amount in the final drive until the change last year (I did other changes, but just filling to lower thread, turning rear wheel, adding a little etc., not forcing 8.7 ounces in) is it just burping to its preferred level which appears to be 7-7.7 ounces?