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#1
11-13-2012, 11:20 PM
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Should I replace these rusty/oxidized components?
Doing some general maintenance on my 190D 2.2L before winter really kicks in, replacing glow plugs, filters, fluids, fuel hoses and anything else that needs attention (debating whether I should replace my injectors or just the nozzles). I'm a bit concerned about the amount of rust and oxidation I'm seeing when I look under the hood. Not entirely sure what some of these things are, in particular the first two closeups. Should have time for a Pick-N-Pull run this weekend if anything here looks like it should be replaced.
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1985 190D 2.2L 717.411 5-speed 1983 300D Euro OM617.950 
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#2
11-14-2012, 01:10 AM
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Pretty sure the 1st closeup is of the Cruise Control actuator.
My general thought is to only replace a component if it has failed. However, if you're at the PNP and you get a great deal, sure... Packman
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83 240D - 4 speed manual - Manilla Beige 189K miles, Tachometer mod, cool wooden shift knob from PeachParts, CocoMats, Original factory paint, manual windows, manual sunroof. Starting to add AudioWrap to this car too! 
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#3
11-14-2012, 01:18 AM
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Second is the EGR. Mine is surface rusty. I wouldn't worry about it. Unless your car is emissions tested and they do some kind of visual inspection but even then as long as its doing its job it shouldn't be an issue.
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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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#4
11-14-2012, 05:25 AM
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wd-40...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#5
11-14-2012, 06:26 AM
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I'd suggest the wd 40 and a plastic dish scrubber on the aluminum (Its not any danger functionally). For the rusty steel I suggest a rust binder which will stop it from rusting any more and turn the rust black. Semi gloss black paint or silver paint on the objects could be applied if you like.
On other notes, if the engine looks like this the undercarriage probably looks pretty scary too.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#7
11-22-2012, 01:47 PM
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Quote:
The rust on my fuel injectors would suggest they haven't been replaced in awhile (or maybe ever). I've been thinking about ordering Monark nozzles from Mercedes Source, but would I be better off replacing the whole units? I don't know how they wear or how often they should be replaced.
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1985 190D 2.2L 717.411 5-speed 1983 300D Euro OM617.950 Last edited by kahlil88; 11-22-2012 at 02:09 PM.
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#8
11-22-2012, 05:20 PM
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A liberal coating of an oven cleaner ,one of the foam based ones worked in with a stiff brush will clean all the alloy and remove all rust if left on for a while, then after rinsing off and completely dried then spray down with Wd40.
Oven cleaners are caustic based hence the excellent rust removal and deep cleaning of alloy.
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