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post #1 of 13 Old 10th March 2011, 12:28 AM Thread Starter
LeeDan00
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Oil change drain plug

Went to my mechanic today for an oil change and was a little confused.

How many drain plugs are our cars supposed to have? I've heard some have 2 plugs depending on the year and model? I just didn't want to miss one plug...

Can anyone confirm?
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post #2 of 13 Old 10th March 2011, 12:53 AM
Clyde
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Quote:
Originally Posted by LeeDan00 View Post
How many drain plugs are our cars supposed to have? I've heard some have 2 plugs depending on the year and model? I just didn't want to miss one plug...
I have only found 1 oil drain plug on my MY2007 M6.
Both plastic shields were removed during my last service, and I could not locate a second plug.
There have been posts that a second drain exists (and 2 washers are included with the oil filter), but there have not been any pictures posted.
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post #3 of 13 Old 10th March 2011, 04:54 PM
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post #4 of 13 Old 10th March 2011, 06:01 PM
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My 2008 appears to have two. I used them when I changed the oil and it went wthout incident.

One oil drain plug is on the pan, which is accessible through a hole in the plastic pan under the engine.

The second one is in the bottom of the plastic oil filter housing, in the passenger side of the front bumper accessed from underneath after removing a panel. You use it to drain the oil filter housing of oil before you remove the filter. Also, since it holds 0.4Liters, it can be used to remove 0.4L of oil if you accidentally overfill the oil. Obviously be carefull not to overtighten this one since it's in plastic.

Make sure you let the engine idle for at least 3 minutes before you drain the oil so all the oil gets pumped into the main sump where the drain plug is.

Last edited by DaveCM5; 10th March 2011 at 06:04 PM.
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post #5 of 13 Old 10th March 2011, 08:02 PM
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Great tip on a way to remove 0.4l of oil. Thanks.

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post #6 of 13 Old 11th March 2011, 10:52 PM Thread Starter
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thanks for the info. i guess i only have 1 drain plug but good info on draining 0.4L of oil just in case.
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post #7 of 13 Old 12th March 2011, 12:32 AM
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Oil change drain plug

My 2006 M5 has the drain plug in the oil pan and a drain plug in the oil filter housing. The dealer had stripped the oil filter housing plug, so I replaced it with a new one after having to drill it out on the bench. You don't actually need to remove the filter housing drain plug because you can just screw off the filter housing with a large socket. It's a little messy, but not too bad.

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post #8 of 13 Old 12th March 2011, 01:05 AM
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Mine stripped out in the filter canister also. Less mess when it works, but not a big deal to dump the filter full. Just a little more mess on my hands. Dealer said the filter housing canister drain stripping out was fairly common from use and over-tightening.
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post #9 of 13 Old 12th March 2011, 01:20 AM
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Mine stripped out in the filter canister also. Less mess when it works, but not a big deal to dump the filter full. Just a little more mess on my hands. Dealer said the filter housing canister drain stripping out was fairly common from use and over-tightening.
The filter canister drain seals with an o-ring, so over-tightening is just a lame mechanic
The torque spec is 10Nm (7lb-ft).

All our cars have both the main sump drain and the filter canister drain.
The second drain plug (if it exists) would drain a second sump
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post #10 of 13 Old 14th February 2017, 05:27 PM
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