Rookie engine question

SoCal911SC · SoCal911SC's Garage

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.

JJ 911SC · JJ 911SC's Garage

Air Pump.

SoCal911SC · SoCal911SC's Garage

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 · gliding_serpent's Garage

no, these were a early/finicky way to meet emission standards by essentially pumping clean air into the exhaust to dilute pollutants.

SoCal911SC · SoCal911SC's Garage

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 · SoCal911SC's Garage

Awesome thanks everyone.

Josh D · Josh D's Garage

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.