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#1
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420sel smog pump
1991 420SEL 170K.
Smop pump failed. I live in Florida with no emissions testing. I'm thinking of removing the entire AIR system. Will this cause any fault codes or engine running or idle issues? What else besides the exhaust manifold tubing, hoses, vacuum lines etc. should I remove, plug, ground etc. Thanks, |
#2
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The air pump on that & most MB's is a warm-up device.
Helps to get the catalyst working quicker. just remove the belt. Only a California version will turn on the check engine light.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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Like MB Doc said, I just removed the belt when I did the water pump, and never put it back on.
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1984 300SD Orient Red/ Palomino 1989 560SEC 2016 Mazda 6 6 speed manual 1995 Ford F-150 reg cab 4.9 5speed manual |
#4
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Thanks, M.B. Doc and E150GT
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#5
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Yeah, the clutch on the pump only engages for a minute or so during warm-up. Then the pulley just freewheels without turning the pump - just like the AC clutch. My 6-cylinder only has one belt; so I just umplugged the wire to the clutch. There's a connector under the coolant bottle.
Also, there is a valve in the air line behind the pump that opens via a vacuum line when the pump engages. I plugged the vacuum line to keep the valve closed all the time, just in case the reverse check valve (also in the air line) failed. DG |
#6
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Smog pump
Quote:
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#7
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Mine is very noisy.Has any one come up with a rebuilding kit for this pump?
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#8
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I disassembled mine. Cleaned all the dirt out, greased the bearings and reassembled it. Surprisingly it operated quietly.
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#9
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I will give it a try. Thanks
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