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Old 10-03-2003, 03:54 PM
jobah's Avatar
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Join Date: Jul 2001
Location: Chicago native-W.MI transplant
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Coolant Drain Question

Has anyone ever removed the block drain to empty the coolant that remains in the block.

If not, are there any suggestions as to how to remove this coolant???

Thanks.

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'84 (11/83) 190D 2.2 5-Speed; Silver/Blue; Motor No. 00354, 402k mi (340+kmi mine)

'89 Porsche 911 Turbo Coupe; Black/Black; 45kmi
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Old 10-03-2003, 04:49 PM
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I've done it out of necessity when putting in a block heater. Other than that I just drain what I can....

Don
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  #3  
Old 10-03-2003, 05:00 PM
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How do you as much as you can. Do you try to take the thermostat out and syphon the fluid out with a topsider (for example)?
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Jovan

'84 (11/83) 190D 2.2 5-Speed; Silver/Blue; Motor No. 00354, 402k mi (340+kmi mine)

'89 Porsche 911 Turbo Coupe; Black/Black; 45kmi
'05 BMW 530i 6-Speed; 215kmi
'10 Range Rover; 30kmi
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  #4  
Old 10-03-2003, 05:55 PM
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Thumbs up

This is a copy of an earlier post I did. Also look at the post titled SHOUT as coolent flush. MR G.


Just did mine too... tough to find
1982 300D Turbo... NEWBIE


I just did this for the first time myself. Couldn't find it on my own from above, but a Mercedes tech showed me where it was while on the lift. You can not see it from above, but if you touch and follow the copper pipe coming out of the bottom of the air filter housing, it will lead you to it. It takes a 17mm ratchet. If you MUST do it from above without a lift or jacks, disconnect the intake pipe into the air filter housing (no tools needed) to give your arm some room. Also, be VERY careful NOT to lean on the overflow hose coming out of the radiator. I broke the nipple off from leaning on it for leverage and am having a heck of a time fixing it.

TECH TIP... the MB techs use SHOUT (that's right... the stuff from the grocery store) in a 1/1 or 1/3 mixture for internally degreasing the engine before using a descaler or flush chemical. Mercedes recommends a 10% citric acid (quite weak.. ie white vineger is 5% ascetic acid). They usually don't bother with the Shout unless they have replaced a head gasket or something, but you may want to do it at least once. MB in their manual says it is critical before doing a chemical flush or descaling. Also, it is important to remove the thermostat in order to do a proper flush and rinse, but you must put the seal back in or it will leak there.

Do multiple flushes between each stage including running the engine up to temperature with the heater on full blast for 5 minutes or so.
After this procedure your engine will smell sweet as your fresh laundry!!!

And finally, do yourself a favor and do an engine steam clean or degrease before you begin. It is really messy down there!

I'm sure this is more than you bargained for but I wanted to share my experience with you. Have fun!

Mr Goodfahrt

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