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  #1  
Old 02-18-2012, 10:52 AM
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How do I replace breather grommet?

I've got an oily mess forming around the base of the breather hose on the top of the valve cover (602 engine). I'm assuming I just need to replace the grommet...is that correct? If so, how exactly do I do that? Seems like it should be simple/obvious, but I thought I'd ask those of you who've done it before.

Thank you.
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06 E320 CDI "Benson", Platinum Blue, 171k mi, DD
91 300D "Otis", Smoke Silver, 124k mi, other DD
98 E300 "Murray", Silver, 124k mi, Stage 2 Rocketchip chip tuned, son's DD

Twelve other MB's owned and sold
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  #2  
Old 02-18-2012, 10:57 AM
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Your OM602 engine is similar to my OM603. All you have to do is to remove the hose and pry out the old grommet. Check first to see if the old grommet has hardened from age; if so, it may want to break into pieces and fall into the valve area. Work slowly and carefully. You may want to hold an operating shop vacuum hose next to the grommet to suck up any loose pieces as you gradually work the old one free.
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  #3  
Old 02-18-2012, 11:03 AM
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Quote:
Originally Posted by Jeremy5848 View Post
Your OM602 engine is similar to my OM603. All you have to do is to remove the hose and pry out the old grommet. Check first to see if the old grommet has hardened from age; if so, it may want to break into pieces and fall into the valve area. Work slowly and carefully. You may want to hold an operating shop vacuum hose next to the grommet to suck up any loose pieces as you gradually work the old one free.
That was my fear. So I would assume that, if a piece WERE to fall in, I shouldn't start the engine but would have to remove the valve cover to fish it out.
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06 E320 CDI "Benson", Platinum Blue, 171k mi, DD
91 300D "Otis", Smoke Silver, 124k mi, other DD
98 E300 "Murray", Silver, 124k mi, Stage 2 Rocketchip chip tuned, son's DD

Twelve other MB's owned and sold
2002 Honda Odyssey 230k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #4  
Old 02-18-2012, 11:08 AM
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Or would a small piece of rubber simply get pulverized in the engine?
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06 E320 CDI "Benson", Platinum Blue, 171k mi, DD
91 300D "Otis", Smoke Silver, 124k mi, other DD
98 E300 "Murray", Silver, 124k mi, Stage 2 Rocketchip chip tuned, son's DD

Twelve other MB's owned and sold
2002 Honda Odyssey 230k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #5  
Old 02-18-2012, 11:11 AM
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I guess a related question is: do I even need to replace it, if it's just a matter of the mess? (which I can wipe off periodically)
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06 E320 CDI "Benson", Platinum Blue, 171k mi, DD
91 300D "Otis", Smoke Silver, 124k mi, other DD
98 E300 "Murray", Silver, 124k mi, Stage 2 Rocketchip chip tuned, son's DD

Twelve other MB's owned and sold
2002 Honda Odyssey 230k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #6  
Old 02-18-2012, 11:39 AM
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I suggest that you buy a new grommet and a new valve cover gasket, pull the valve cover off, do your valves, fix the grommet.

Sincerely,

PE
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  #7  
Old 02-18-2012, 11:44 AM
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Quote:
Originally Posted by PackerEdgerton View Post
I suggest that you buy a new grommet and a new valve cover gasket, pull the valve cover off, do your valves, fix the grommet.

Sincerely,

PE
602 valves don't need to be adjusted....so I never have any reason to remove the valve cover.
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06 E320 CDI "Benson", Platinum Blue, 171k mi, DD
91 300D "Otis", Smoke Silver, 124k mi, other DD
98 E300 "Murray", Silver, 124k mi, Stage 2 Rocketchip chip tuned, son's DD

Twelve other MB's owned and sold
2002 Honda Odyssey 230k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #8  
Old 02-18-2012, 01:11 PM
scottmcphee's Avatar
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It's easy to replace the grommet without bits falling in: drain all fluids, hold the car upside with one hand and use needle nose pliers to grab the grommet and pull it out. If it cracks and falls to pieces, the bits just fall on the floor. Set the car down and put the fluids back in.

This is how I did mine. Learned the trick from my friend, Chuck.
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  #9  
Old 02-18-2012, 01:56 PM
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LMFAO.
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  #10  
Old 02-18-2012, 02:16 PM
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You can check chain stretch while the valve cover is off. Call the neighbors over to see how clean the valve train is despite the black oil. If you use good quality oil like I know you do, there won't be sludge like you find in many gasser valve covers.

Sixto
87 300D
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  #11  
Old 02-18-2012, 02:22 PM
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Quote:
Originally Posted by sixto View Post
You can check chain stretch while the valve cover is off. Call the neighbors over to see how clean the valve train is despite the black oil. If you use good quality oil like I know you do, there won't be sludge like you find in many gasser valve covers.

Sixto
87 300D
My neighbors are not savvy enough to appreciate such things.
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06 E320 CDI "Benson", Platinum Blue, 171k mi, DD
91 300D "Otis", Smoke Silver, 124k mi, other DD
98 E300 "Murray", Silver, 124k mi, Stage 2 Rocketchip chip tuned, son's DD

Twelve other MB's owned and sold
2002 Honda Odyssey 230k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #12  
Old 02-18-2012, 05:41 PM
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There Are Lots of Savvy people in Rhode Island

How long and hard did your Detective Agency have to look to find an area
where the average I.Q. is so low ?

('Cause We Know You ain't putting forth THAT much effort looking.)
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