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#1
03-04-2015, 09:19 AM
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W210 Duovalve Cleaning vs. Replacing
99 E300 has 163,000 miles. Six years ago, duovalve was acting up for PO so he took it apart and cleaned it...worked fine for next five years. I took ownership last July. Duovalve began acting up so I used a whacking regimen to get me through the summer.
How long can one of these things be kept going merely by cleaning? I know that EVENTUALLY they need to be replaced...which is my inclination in this case. Just curious if anyone has had success with multiple cleanings over the miles and years. Can get a new one for about $235. If it's inevitable at some point anyway, I guess I'd just as soon replace it now.
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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles 06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver on Tan, 142k mi, wastegate conversion, ALDA delete 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife Last edited by shertex; 03-04-2015 at 12:54 PM. 
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#2
03-04-2015, 10:14 AM
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Have you seen the writeup I did where I took the thing completely apart, replaced the swollen rubber bits and put it all back together?
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-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250
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#3
03-04-2015, 10:18 AM
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Quote:
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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles 06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver on Tan, 142k mi, wastegate conversion, ALDA delete 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife
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#4
03-04-2015, 10:25 AM
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Thanks, about the only thing I would change in the procedure is to use a leather/gasket punch to enlarge the holes in the rubber seals rather than trying to drill them out.
Drilling is a tedious process in the soft rubber and the rough holes I'm sure, allow leakage across the seal which will degrade the performance of the AC in the summer.
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-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250
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#5
03-04-2015, 12:00 PM
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They say a whacking regimen can be bad for your eye sight.
I too have read KarTeks writeup and was going to use that on my W210 when the duovalve acts up.
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68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500 Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i
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#6
03-04-2015, 12:55 PM
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Quote:
__________________
-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250
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