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#1
03-29-2011, 07:29 PM
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O-ring removal..... any ideas?
I am replacing all the seals on my SLS pump for the 190. I have the entire ting disassembled (what a PITA). The last thing that I cannot get off is the o-ring on the center piece in the pump. The ring has hardened tot he consistency of a rock. The other two that I have removed will break if I bend them. I guess after 24 years I should not be too surprised huh?
Anyway, the instructions that I received recommended I do not use any metal tools for messing with parts inside the pump as any scratches could cause leaks. I have some bamboo skewers which had so far proved useless. I tried very carefully to insert a razor between the metal and the o-ring to try and coax it out. The razor broke (I got the small piece out so no harm but now I am scared. The o-ring is the black band near the top of the cylinder. Any ideas how to get it off? Not really keen on heat as I don't want to warp anything (very tight fit back into the housing). I had thought about acetone or something like that to melt it but will that etch the metal? 
__________________
Sent from an agnostic abacus 2014 C250 21,XXX my new DD ** 2013 GLK 350 18,000 Wife's new DD** - With out god, life is everything. - God is an ever receding pocket of scientific ignorance that's getting smaller and smaller as time moves on..." Neil DeGrasse Tyson - You can pray for me, I'll think for you. - When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours. Last edited by davidmash; 03-29-2011 at 07:42 PM. 
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#2
03-29-2011, 07:40 PM
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If you have a sharp "pick" tool you can carefully try to puncture the o-ring, and lever it off.
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http://i193.photobucket.com/albums/z...-RESIZED-1.jpg 1991 300E - 212K and rising fast...
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#3
03-29-2011, 07:44 PM
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That's an idea but I'm really scared of using anything metal in case I slip off the ring. It is very hard with zero flex.
__________________
Sent from an agnostic abacus 2014 C250 21,XXX my new DD ** 2013 GLK 350 18,000 Wife's new DD** - With out god, life is everything. - God is an ever receding pocket of scientific ignorance that's getting smaller and smaller as time moves on..." Neil DeGrasse Tyson - You can pray for me, I'll think for you. - When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours.
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#5
03-29-2011, 07:53 PM
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These are what I have, got them at Advance Auto Parts IIRC. I was envisioning using the 90 deg hook pick. Should give you enough control so that slipping and gouging the metal can't happen.
__________________
http://i193.photobucket.com/albums/z...-RESIZED-1.jpg 1991 300E - 212K and rising fast...
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#6
03-29-2011, 08:27 PM
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Hmm. I like those. I wonder if an auto parts store would have those. I was thinking maybe using one of those and making it hot to slice the o-ring.
__________________
Sent from an agnostic abacus 2014 C250 21,XXX my new DD ** 2013 GLK 350 18,000 Wife's new DD** - With out god, life is everything. - God is an ever receding pocket of scientific ignorance that's getting smaller and smaller as time moves on..." Neil DeGrasse Tyson - You can pray for me, I'll think for you. - When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours.
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#7
03-29-2011, 08:53 PM
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Press a razor-blade down into the ring diagonally to cut the ring. It shouldn't affect the steel of the pump unless you try sawing or otherwise moving the blade, a straight cut should be fine.
You can also try a metal softer than the steel, if you have a piece of copper wire (like a 12ga copper ground wire etc.), brass, etc. that you can hammer flat enough to use as a pry tool. Any metal softer than the steel will not scratch the steel. If you need a pump, I have a (used) spare from a 16v.
__________________
 Gone to the dark side - Jeff
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#8
03-29-2011, 10:58 PM
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SLS for 190?
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k
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#9
03-29-2011, 11:49 PM
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Quote:
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 1990 190E 3.0L
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#10
03-29-2011, 11:50 PM
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Quote:
It's a 2.3-16V? Quote:
__________________
http://i193.photobucket.com/albums/z...-RESIZED-1.jpg 1991 300E - 212K and rising fast...
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#11
03-30-2011, 10:35 AM
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Got it off. I used the razor to cut it. Now to put everything back together and purge the old fluid.
__________________
Sent from an agnostic abacus 2014 C250 21,XXX my new DD ** 2013 GLK 350 18,000 Wife's new DD** - With out god, life is everything. - God is an ever receding pocket of scientific ignorance that's getting smaller and smaller as time moves on..." Neil DeGrasse Tyson - You can pray for me, I'll think for you. - When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours.
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#12
03-30-2011, 01:51 PM
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Glad you got it done. I have a similar set of picks that i got at Sears 10 or 15 years ago. Real dental picks would be awesome if you can get a deal on them--real fine and really sturdy.
A few years back i was going to bid on a lot of dental tools from govennment liquidators, but...before they came up for bid i had an issue with with some other stuff i bought on there, and my wife absolutely forbids going to their web site (something about steel cabinets falling out of my truck on the highway, narrowly missing some cars, gouging my hood, live animals, cats living with dogs--i have no idea what her problem is  ) Plus, she couldn't figure out what i would do with 2 pallets of dental equipment--no imagination!!Back to lunch now, before i violate my marriage vows...
__________________
Earl McLain '02 C230 Kompressor '89 560 SEL "Frau BlueCar" (retired April 2004)
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#13
03-30-2011, 09:20 PM
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I have to pull the pump again. The back seal is leaking more now then before. I assume Seated it wrong. Very frustrating after a day and half of work. I just hope its just rhe seal and not something more drastic that I screwed up.
__________________
Sent from an agnostic abacus 2014 C250 21,XXX my new DD ** 2013 GLK 350 18,000 Wife's new DD** - With out god, life is everything. - God is an ever receding pocket of scientific ignorance that's getting smaller and smaller as time moves on..." Neil DeGrasse Tyson - You can pray for me, I'll think for you. - When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours.
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