Air pump noise after start up?

[dds28]

Hi everyone,

I recently noticed on my 95 e420 the air pump bearing was getting noisier. A few days ago, when the engine is cold, I hear what seems like an exhaust leak, kind of like a hole in the exhaust type of noise from the right side of the engine. After about 2 minutes from a cold start, it goes away. Is this the start of a failing air pump? Should I start looking for a replacement?

 

[gsxr]

More likely it's a broken hose at the air pump outlet, but it could be the air pump itself. Check it out with a flashlight at the next cold start.

 

[dds28]

I'll check that. Thank you sir! If I need a replacement, where do you recommend to buy a remanufactured one?

 

[gsxr]

If it only needs hoses, replace those first.

If the pump itself is noisy due to failing internals, look for a rebuilt / remanufactured one (not cheap).

 

[dds28]

Here is a short video of the noise shortly after start up and after 2 min of idling after clutch disengages, I didn't find any holes in the hose but could have missed it by looking in the wrong places.

 

[gsxr]

Might be the pump itself...

 

[dds28]

Thaks Dave. Does $400 sound about right for a remanufactured one? Would you recommend C&M Hydraulics?

 

[gsxr]

Thaks Dave. Does $400 sound about right for a remanufactured one? Would you recommend C&M Hydraulics?

Yes and yes. I'm not sure who else rebuilds these.

 

[emerydc8]

I installed a C&M pump about 15 months ago and have had zero problems with it. I bought it from FCP Euro. They’ve gone up significantly since then.

https://www.fcpeuro.com/products/mercedes-air-pump-119140178588a

 

[Berglund]

Regarding this air pump
Isn’t it possible to ”bypass” this air pump by replacing the multi-belt with a shorter version?

 

[gsxr]

Regarding this air pump
Isn’t it possible to ”bypass” this air pump by replacing the multi-belt with a shorter version?

If the bearing is good in the pump you can simply disconnect it (unplug the electrical connector).

Completely removing the pump requires replacing it with a bracket and idler pulley, which are NLA from the dealer.

 

[Berglund]

If I want to remowing the pump..
Will it be possible to find a complete kit with bracket and pulley to find after market!
Some one seen or built anything?

 

[lowman]

There is also an airpump delete kit available made by a german company. New bracket/pulley bracket and pulley

 

[gsxr]

There is also an airpump delete kit available made by a german company. New bracket/pulley bracket and pulley

Cool! Have a link?

 

[lowman]

Here is a link for the company. Lots of goodies here. They also do repro rear transmission mounts, NSS for the v8"s, etc etc.

Kurth Classics Autoparts

hier findet Ihr Mercedes Ersatzteile in Original oder verbesserter Qualität

kurth-classics-autoparts.de

 

[lowman]

Cool! Have a link?

yup.Posted a link below..but here is also a link directly to the "500e section" Lots of goodies on there

Startseite

kurth-classics-autoparts.de

 

[Surf Blau]

Agreed, Kurths is great - here's a link directly to the kit as well: Mercedes M119 Ersatzkit Sekundärluftpumpe (Var: 6-Rippen Riemen)

 

[lowman]

And here is for the 8 rib belt version

Mercedes M119 Ersatzkit Sekundärluftpumpe

Bei uns bekommen Sie alles, was Sie für eine erfolgreiche Reparatur Ihres Mercedes Klassikers benötigen

kurth-classics-autoparts.de

 

[JC220]

I plan on making a small production run of m119 air pump delete brackets next spring. They will be well made and considerably better priced than the ones linked above.

 

[JC220]

Waterpump delete?wow..thats interesting

Oops sorry- corrected now

I am typing from a boat in Italy

 

[gsxr]

Agreed, Kurths is great - here's a link directly to the kit as well: Mercedes M119 Ersatzkit Sekundärluftpumpe (Var: 6-Rippen Riemen)

Thanks! Interesting design, it only replaces the air pump, and uses the existing bracket. THis is different than the factory solution but may use the standard belt length (I think the factory setup uses a different belt length). €280 w/VAT, maybe ~€240 without VAT. Probably €300+ with shipping/tariffs to USA, $350-$400 USD total delivered? Suddenly a reman air pump doesn't look that expensive.

 

[gsxr]

I plan on making a small production run of m119 air pump delete brackets next spring. They will be well made and considerably better priced than the ones linked above.

Oooo - looking forward to more details on this, Joe!