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Old 09-27-2004, 11:02 PM
brookspw's Avatar
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Join Date: Dec 2001
Location: Nashville, TN
Posts: 551
Smog pump/pulley questions

1991 190E 2.6

Some pump/pulley began whirring/whining a few days ago. I've narrowed it down to the smog pump and/or smog pump pulley.

Questions:
1. What are these things made of? Gold? $1,000? Found a rebuilt pump with pulley for about $350.
2. Typically, what causes this problem? Is it the pump or is it the pulley?
2b. If pump, can't I just disconnect the electric to the pump and be done with it?
2c. If pulley, how difficult is it to install a correct sized belt that bypasses the pump considering moderate to pretty good technical skills?
3. Considering same skills, how difficult would it be for me to r/r said pump or pulley?
4. How do I confirm whether it is the pump or the pulley?

-- It seems to continue even after the engine is warm. No matter how long it has been running, if I raise the rpms it is evident.

Thanks mucho for the info.

Anyone have links to the rebuilds mentioned in other threads and would the quality be ok?
__________________
1994 C280, dark green metallic
105k miles

1991 190E 2.6, Black
191,500 miles
(sold to another forum member)

2003 Chevy Tahoe LT, Redfire Metallic
105k miles

1989 Mustang GT Cobra Convertible
43k miles
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