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Old 04-02-2002, 01:38 PM
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kowached kowached is offline
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Join Date: Sep 2001
Location: Michigan
Posts: 74
Air Pump & EGR

These are 2 different systems.
1) The Air Pump provides oxygen to the exhaust manifold for a more efficient burn of exhaust gasses. The airpump is a belt driven accessory (looks like an alternator, or A/C compressor) that pumps air through hoses and finally into holes in the exhaust manifold (as many holes as cylinders). If the pump shares a belt with any other acessories, then just simply measure for a new shorter belt if you remove it.

2) The EGR, Exhaust Gas Recirculation valve does just that, it re-routes exhaust gasses from the exhaust manifold to the intake manifold. I don't think that you'll see a huge performance difference by taking it off, but it sure does look better, and its one less vaccum operated mechanism to leak and give you a rough idle.

I of course do not endorse the removal of any emmisions related equipment required by law, unless the vehicle if for off road use only.

1998 BMW 540i Sport
1995 E320
1992 400E
1989 BMW M3
1979 Triumph TR7 (1st car)
1986 BMW 735i (Sold)
1980 BMW 320i (Sold)
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