air pump/smog pump
 

Does anyone have a parts # breakdown of the air pump for a 88 560sl
Does anyone sell rebuid parts for these smog pumps?
Mine looks like it was pumping sumps !!!

No parts available from MB in the aftermarket.

IF there is water in the pump then the check valve on the exhaust must be letting water(exhaust condensation) into the system.

The pump is ONLY a warm-up device for the catalyst. Helps to "fire-up" the catalyst quicker!

took it apart the front shaft is frozen
Do you have a part # for the check valve
Thanks for the help

Check with these guys. They sell rebuilts for a very good price.

Service@DynaTechCorp.com

Thanks
I am going to try cleaning it up first
The meat head that owned it before said it always makes that noise at first start up
Well I felt that MB doesn't build stuff that squeals by design
so I pulled it apart
As DOC said It only works for start up so I thing it will rotate atleast
I cleaned everything and replaced the front frozen bearing (not the idler one)
what a mess to do
if only people would react when they hear something it would be alot easier