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  #1  
Old 04-21-2009, 01:56 PM
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Piece of Rubber in Cooling System: A Problem?

Part of the deteriorated gasket on expansion tank cap (about 3/4" long) dropped into expansion tank. Drained tank in attempt to fish it out, but can't find it. If somehow it simply gets sucked into the cooling system, is that a large enough piece to cause a problem, or can it simply float around forever?

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  #2  
Old 04-21-2009, 02:06 PM
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Water pump - should be no big deal. The impeller should chew it up in the worse case.
Radiator - if it gets here it will probably block one of the tubes. You'll lose a little cooling but assuming the rest of the radiator is clear it probably won't be a problem.
Engine - This is the problem. If it gets somewhere and blocks the flow you could have material damage.

One idea could be to place a screen in line on the outflow of the radiater to catch the item.
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  #3  
Old 04-21-2009, 02:29 PM
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Quote:
Originally Posted by Gene Horr View Post
Water pump - should be no big deal. The impeller should chew it up in the worse case.
Radiator - if it gets here it will probably block one of the tubes. You'll lose a little cooling but assuming the rest of the radiator is clear it probably won't be a problem.
Engine - This is the problem. If it gets somewhere and blocks the flow you could have material damage.

One idea could be to place a screen in line on the outflow of the radiater to catch the item.
YIKES! I haven't turned on the engine, so it can't be in the system yet. But I can't find it anywhere. At the bottom of the tank, there's a metal tube the sticks up. I'm trying to figure out if it's stuck down there somewhere, but it's hard to see.
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06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife
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  #4  
Old 04-21-2009, 02:35 PM
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I wouldn't worry about it too much if you can't find it. It will almost certainly wind up in your radiator where it will have virtually no effect.
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  #5  
Old 04-21-2009, 05:05 PM
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If you haven't run the car since losing it, unhook the hose that goes from the expansion tank to the radiator and look for it somewhere in there.

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