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  #1  
Old 11-10-2001, 11:39 AM
clmiller
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300E Thermostat cover

While in the shop this week, my mechanic saw a small leak from the plastic thermostat cover. Went to my local parts store to get the replacement. They gave me a metal (aluminum?) one with a hole on top perhaps for a sensor. When I said the plastic one didn't have a hole on top, they gave me a plug bolt to insert. They didn't have the copper crush washer bot will have one for me on Monday.

Is this the correct thermostat cover? Was the replacement for the plastic made as a one-size-fits-all? I don't believe having a plugged hole will cause any problems.

--Craig
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  #2  
Old 11-10-2001, 12:04 PM
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Join Date: Jul 2001
Location: Western Michigan
Posts: 1,080
Yes, that is the correct and improved cover.

The plastic cover breaks (good MB engineering) and the Aluminum one will not break.

The hole on the top is a breeder hole when you fill coolant.
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  #3  
Old 11-10-2001, 12:09 PM
clmiller
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Thanks

Thanks Bo,

I am going to replace the weeping plastic cover today.

--Craig
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  #4  
Old 11-10-2001, 12:12 PM
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Join Date: Jul 2001
Location: Western Michigan
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I replaced the covers on both of my 300Es when the improved one came out. I think they were like $15 each.

With the sealed plastic cover, I had to remove one of the breeder nuts on top of the engine when filling coolant through the expansion tank. Now with the metal cover, I just loosen the nut on top of the cover and fill coolant through the expansion tank.
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  #5  
Old 11-10-2001, 12:16 PM
clmiller
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Breeder hole?

If I park next to a 450SL what would I get?
--Craig
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  #6  
Old 11-10-2001, 12:59 PM
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Location: Western Michigan
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Craig:

You then get a SLK450 AMG by parking next to a 450SL through breeding.

Sorry, bleeder hole.
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  #7  
Old 11-10-2001, 09:11 PM
clmiller
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trying to find mate.

I jacked up the front end so I wouldn't lose too much coolant and removed the plastic cover. While I was replacing the cover, I went ahead and replaced the thermostat too. The bleeder hole came in handy when refilling. What will these engineers think of next?

Figure I'll hang on to old one as an emergency spare.

Now I'll have to cruise down to Newport Beach to see if I can find a sexy, new MB to try out the breeder hole.

--Craig
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