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  #1  
Old 11-29-2009, 08:55 PM
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How do you remove the coolant expansion tank?

I was going to remove the anti-freeze expansion tank on my 190E yesterday just to give it a really thorough cleaning. After being filled with coolant for the past 17 years it has gotten kind of slimy inside and I can't see the level of the coolant without taking off the cap and looking inside.

I removed the one nut and the plastic fastener at the end of the tank, but when I tried to remove it I found that the bottom of the tank is attached the the inside of the fender. I gave it a firm pull but I was afraid of breaking something seeing as how the plastic tank is 17 years old. Is there a trick to removing this tank? I looked up the tank in Fastlane to get a better look at the bottom and it looks like it just has a plastic knob that pops into the fender. My tank also has a rubber grommet around the knob that connects to the fender. Any advice would be appreciated. Thanks!

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Old 11-29-2009, 09:06 PM
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Spray the knob with some penetrating oil, wait a few minutes and then twist the tank a bit back and forth. Should pop right out.
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Old 11-30-2009, 10:26 AM
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You may want to consider silicone spray instead if the rubber is still good. It won't deteriorate the rubber as easily as penetrating oil will. It's a petroleum based chemical and will melt rubber fairly quickly.
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Old 11-30-2009, 01:54 PM
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Quote:
Originally Posted by Rick_MD View Post
You may want to consider silicone spray instead if the rubber is still good. It won't deteriorate the rubber as easily as penetrating oil will. It's a petroleum based chemical and will melt rubber fairly quickly.
Do'h! He's right.

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