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  #16  
Old 08-22-2010, 11:27 PM
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Have the new gasket ready that goes on the head. It's a $1 part. Put a rag in the head while you scape off the old gasket to keep the scmootz out of there. Use a new hose of course. Take a good look at the fitting that comes from the water pump while you have the hose off. It may be getting ready to go too. If so there is no better time to do it! It's leaks after you shut it down because the system is still under pressure and the coolant finds the path of least resistance. I just did one last week. Don't over torque the bolts that go into the head. It's just a coolant fitting, not a moving part. I like to use grey RTV water pump sealant for any coolant areas but everyone has their favorite flavor. By the looks of the rust around the fitting I would flush the system. I see nothing wrong with green coolant. Although I do like the color Orange. I think I'm up to 10 cents now.
Oh, and have fun.

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Last edited by Fattyman; 08-23-2010 at 12:36 AM.
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  #17  
Old 08-23-2010, 03:38 AM
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10¢ that are greatly appreciated. Thanks Fattyman.
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  #18  
Old 08-23-2010, 05:13 PM
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Answer

Quote:
Originally Posted by chetwesley View Post
Before I take this apart, what am I getting into here?
Hose, thermostat to water pump
MB# 900271042012

Gasket, thermostat housing to cylinder head
MB# 616 203 02 80

thermostat
MB# 617 200 18 15

Fastlane: thermostat
http://catalog.peachparts.com/item.wws?sku=W0133-1629646






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Last edited by whunter; 06-06-2011 at 04:54 PM.
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  #19  
Old 08-25-2010, 02:01 AM
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Thanks whunter. I think I am actually going to expand this a little bit.

My radiator is leaking a little bit at the seam, so I decided I am just going to take care of all of this at once while I am draining the coolant.

So my plan is to take care of the following:

• Radiator
• Radiator mount kit (clips and stuff)
• Upper and lower radiator hoses (I should do this, right?)
• Thermostat
• Thermostat housing to cylinder head gasket
• thermostat to water pump hose
• New red coolant

Anything I am missing that is in the circuit of things being changed?

I have read a little bit here and there about citrus flush. Is there any need to worry about this if I am changing out the radiator?

Help is greatly appreciated. Never had to deal with the cooling system on any of my other MBs in the past. I always search on any job I am going to do, but may not realize I am missing something if I don't know what I am getting into.
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  #20  
Old 08-25-2010, 08:48 AM
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get MB coolant or Zerex G05. not the DEX-COOL. *(DEATHCOOL)*
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  #21  
Old 08-25-2010, 10:45 PM
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A Question about the thermostat gasket, When i replaced mine there was a slit in the old one and a hole in the new one for the little by-pass line. Which is correct or was my old one just swollen shut to look like a slit? By the way i broke off the lower bolt on the t-stat housing and had to tap a new thread so let those suckers soak over night or longer.
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  #22  
Old 08-26-2010, 06:19 PM
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Thanks Quirky Mercy for the info about the bolts. That is two on "let it soak" so I better... Obviously I don't know the answer to your question because I've never been in there, but hopefully someone will know.


One last bump before I order parts. Can anyone think of anything I should get other than the following, if doing both the radiator and the thermo gasket?

• Radiator
• Radiator mount kit (clips and stuff)
• Upper and lower radiator hoses (I should do this, right?)
• Thermostat
• Thermostat housing to cylinder head gasket
• thermostat to water pump hose
• New red coolant

?

Thanks
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Sold but fondly remembered: 1981 300TD Turbo Tan 235K miles, 1983 300SD Astral Silver 224K miles

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  #23  
Old 08-26-2010, 09:50 PM
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Flush your system first so you don't circulate all the crap into your new radiator. Use anti seize on the thermostat housing bolts to keep them from seizing up again. Makes taking them off almost pleasurable! Clean the mating surfaces with scotchbrite (where the hoses mount). I like to use a little Dow DC4 grease on the O ring of the thermostat as well (make sure that the relief area where the o ring goes is nice & clean too. We would always spend more time cleaning parts than reassembling them!
Take your time, save the beer for later.

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