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Thread: BMW 840 M62 engine coolant drain plug

  1. #1
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    BMW 840 M62 engine coolant drain plug

    Hi,

    I was doing my coolant flush today and while I can see the engine drain plugs on both sides of the v8, I doesn't seem like there is enough room to even get at them to break them loose. Is there any other method or tricks you can provide. Bastards are really in a poor spot. I literally tried everything. Is there anything I need to remove in the diagram of the engine compartment to get proper access.

    Mike
    Last edited by toomanyparts; 08-20-2011 at 04:48 PM.

  2. #2
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    They are nigh-on impossible to get to with the exhaust manifolds fitted - just remove the lower hose to the radiator, that will do the job.
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  3. #3
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    Timm,

    Thanks. I did remove the lowest right hand side hose and very little coolant came out. I had drained the radiator via the drain nut first.

  4. #4
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    Flush as much as you can with the easiest-to-remove hoses disconnected. Don't forget the heater/water valves, this is often the receptacle for gunge to accumulate. The heater hoses are easy to get to on the E31 once the microfilter housing has been removed:



    Don't go too far in trying to remove the last dregs from the block - if it is difficult to get out, you can be sure it's going to be harder to get it back in again!
    Last edited by Timm; 08-20-2011 at 07:33 PM.
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


    My BMW Repair YouTube Channel
    My Current 840ci Sport Individual
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  5. #5
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    Why not use a vacum refill tool. They are pretty common.




    Quote Originally Posted by toomanyparts View Post
    Hi,

    I was doing my coolant flush today and while I can see the engine drain plugs on both sides of the v8, I doesn't seem like there is enough room to even get at them to break them loose. Is there any other method or tricks you can provide. Bastards are really in a poor spot. I literally tried everything. Is there anything I need to remove in the diagram of the engine compartment to get proper access.

    Mike

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