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  #16  
Old 03-14-2007, 12:07 AM
toomany MBZ's Avatar
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Quote:
Originally Posted by dieseldan44 View Post
Thanks everyone...replaced the stat today after work. Had to work fast before the NE darkness set in. I dumped in the old green coolant, promising myself that I will do the flush as outlined here ASAP.

Well - I put in an 80 c Behr stat and went for a 45 min drive - Temp now stays at 90 all the time, 85 if I put the heat on. From what Ive read this is perfect for an 80 c stat. Woo hoo. It's nice when things are easy like that.

Interesting sidenote - my old t stat had a hole in it STOCK. Maybe an 1/8" hold with a brass insert thing to dampen the flow a little bit, but it was defintely not an afternarket mod. The stat was some off brand, I forget the name now.
Many t'stats I've replaced, non MB, had a hole, believe it's a safety thing, being a constant flow, perhaps saving an engine.
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  #17  
Old 03-14-2007, 12:13 AM
ForcedInduction
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Originally Posted by sokoloff View Post
Most city water/sewer systems allow you to dump coolant down the drain.
"In most cases, it is acceptable to dump the waste antifreeze down your toilet, flushing often as most water treatment facilities are more than capable of treating the water."

This is both wrong AND illegal. Waste treatment facilities are NOT designed to handle Glycol liquids. They are only designed to handle human waste, toilet paper and other biodegradable matter.
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  #18  
Old 03-14-2007, 12:22 AM
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if you have a turbo vehicle, filling through the upper rad hose is not necessary. the radiator is vented to the expansion tank!
on the N/A vehicles, ya have a vent cast into the thermostat housing. usually. if not, pull the upper hose and fill until fluid comes out the radiator.

John
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  #19  
Old 03-14-2007, 06:43 AM
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Sounds as if you have read the service manual...

Your references to the coolant flush sound as if you have read the service manual. The pages relating to the thermostat are explicit in the pointing out of a little arrow that is stamped into the rim of an OEM Thermostat.....the arrow is to point UP.......

And there are also some comments relaying to the fact that the cooling system does not require venting.....just running the heater system.....please note that I have not read any of the service manual other than the sections that relate to Turbo Models....OM 617.952

SB
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  #20  
Old 03-22-2007, 10:01 PM
Christian
 
Join Date: Feb 2007
Location: Western Mass
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location of engine drain plug

Could anyone point out where the engine drain plug is on the 616.916 engine? (that's my 1974 240D)...I've never done a flush either before and want to do it tomorrow (finally good warmer weather here in Mass)
Thanks!!
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  #21  
Old 03-22-2007, 10:51 PM
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Talking

Quote:
Originally Posted by ForcedInduction View Post
"In most cases, it is acceptable to dump the waste antifreeze down your toilet, flushing often as most water treatment facilities are more than capable of treating the water."

This is both wrong AND illegal. Waste treatment facilities are NOT designed to handle Glycol liquids. They are only designed to handle human waste, toilet paper and other biodegradable matter.
"Environmental Fate:
When released into the soil, this material is expected to readily biodegrade. When released into the soil, this material is expected to leach into groundwater. When released into the soil, this material is not expected to evaporate significantly. When released into water, this material is expected to readily biodegrade. When released into the water, this material is expected to have a half-life between 1 and 10 days. This material is not expected to significantly bioaccumulate. This material has a log octanol-water partition coefficient of less than 3.0. When released into water, this material is not expected to evaporate significantly. When released into the air, this material is expected to be readily degraded by reaction with photochemically produced hydroxyl radicals. When released into the air, this material is expected to have a half-life between 1 and 10 days. "

Offhand I would say that what his local government has told him is ok really is OK.

http://www.hvchemical.com/msds/etgl.htm

-Jim
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