1995 E420 Smog Air Pump Replacement

[emerydc8]

It looks like the pulley bearing on my smog pump finally failed right at 260,000 miles. It makes a grinding noise even when unplugged. The EPC shows the six-rib part number 119 140 17 85 (from model year 1993 and up). Looking on eBay for a used pump (not rebuilt) under this part number, all I'm seeing is a Canadian seller (below). The price is right, but I've never purchased a part from Canada and I'm not sure whether it will get held up in customs for weeks. Anyone know if a pump from another M119 will work or whether there are better places to source the pump? I don't really care to buy a rebuilt from C & M at this point, unless I have to.

Mercedes 400E SL500 1992-1996 OEM Secondary Air Injection Pump Smog Pump | eBay

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[gsxr]

Jon, assuming you don't want C&M due to the high cost, why not just replace the bearing? Threads linked below.

I've not had any issues buying from Canada. Transit time may be a day or two longer due to customs, but it would be unusual to have something stuck in customs.

The same 6-rib pump is used on all M119's with M119.97x engines, from 1993-95 USA model years (124, 129, 140 chassis).

Air Pump Pulley Bearing and Filter Replacement | 400E / E420 Discussions

I'm in the process of changing the pulley bearing on my '95 E420 air pump. Anyone done this lately and available to offer any tips? I'm planning to grind away the small, displaced metal tabs at the back of the pulley, press the bearing out and replace it. Also, I discovered that the box on the...

www.500eboard.co

Engine air compressor [smog pump] bearings | M119 Engine

Hello to all the team. I was not much talkative since my registration, but spent time reading threads about that fantastic car. I own a [1992] 500E since 2003 (purchased for the birth of my son), and we have had wonderful travels with it. The last trip was to Venise (Italy) with the family...

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[natejgreene9871]

Mercedes M119 Smog Pump-replacement-kit-6-ribbed-belt

You have issues with your secondary air / smog pump? Get our replacement kit and completely remove the pump.

kurth-classics-autoparts.de

 

[emerydc8]

The same 6-rib pump is used on all M119's with M119.97x engines, from 1993-95 USA model years (124, 129, 140 chassis).

Thanks Dave. I don’t really want to have the car down for the time it would take to work on replacing the pulley bearing. My other car which is not driven daily also needs pulley bearings so after replacing the pump on my daily-driver I might order the bearing kit and do that when I’m not rushed.

Do you know if part 000 140 34 85 will work?

94-95 Mercedes R129 SL500 S500 E500 Air Injection Smog Pump 0001403485 OEM | eBay

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[gsxr]

Jon, that number doesn't exist in the EPC, but if the listing is accurate that it came off a 94-95 SL500 then yes it will fit.

However, $200 for a used pump seems like a big gamble - could have a bearing on the way out, worn internals, etc in addition to the frayed wire insulation. Plan on replacing the rubber hoses, btw - if they are old/original they will be fossilzed.

You can get a C&M reman pump for $365 with warranty:

https://www.rmeuropean.com/Make/PartNumberSearch.aspx?pnsearch=1191401785

The Kurth kit is tempting but €500 is painful.

 

[emerydc8]

Jon, that number doesn't exist in the EPC, but if the listing is accurate that it came off a 94-95 SL500 then yes it will fit.

However, $200 for a used pump seems like a big gamble - could have a bearing on the way out, worn internals, etc in addition to the frayed wire insulation. Plan on replacing the rubber hoses, btw - if they are old/original they will be fossilzed.

You can get a C&M reman pump for $365 with warranty:

You’re right Dave. I ordered the C&M rebuilt from RM European. Is the supplier for the pulley bearing the German company?

 

[gsxr]

Is the supplier for the pulley bearing the German company?

So far, I have only seen replacement pulley bearings made in China. I don't know if there is a better quality bearing out there... or, what C&M uses!