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-   -   Rookie engine question (http://forums.pelicanparts.com/porsche-911-technical-forum/830818-rookie-engine-question.html)

SoCal911SC 09-21-2014 05:51 PM
Rookie engine question
 
On this 3.0 motor, I can see the AC compressor platform on the right as it is on my 3.0, but what is the unit on the left that has the belt running to the alternator fan? Is this an early 3.0 motor? Thanks.

http://forums.pelicanparts.com/uploa...1411350666.jpg

JJ 911SC 09-21-2014 05:53 PM
Air Pump.

SoCal911SC 09-21-2014 06:08 PM
Is that to circulate the AC thru the car? Was this an early 3.0 thing because my '82 didn't have it when I removed the AC and heater blower motor.

gliding_serpent 09-21-2014 06:17 PM
no, these were a early/finicky way to meet emission standards by essentially pumping clean air into the exhaust to dilute pollutants.

SoCal911SC 09-21-2014 06:20 PM
Would it be safe to say this is an early '78-'80 3.0?

McLovin 09-21-2014 06:41 PM
It's a model year 78 or 79.

The smog pump was done away with for the model year 1980.

SoCal911SC 09-21-2014 06:54 PM
Awesome thanks everyone.

Josh D 09-21-2014 08:08 PM
Quote:
no, these were a early/finicky way to meet emission standards by essentially pumping clean air into the exhaust to dilute pollutants.
Actually that's incorrect. The fresh air was pumped into the exhaust to continue the combustion of unburnt hydrocarbons.


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