Smog system?
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4th Gear
Joined: Dec 2003
Posts: 4
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From: san diego ca
Smog system?
I currently own a 1971 Lt1, match #'s. Did all early LT1's have smog? My reason for asking is I see no extra pully for a pump belt. The car sold new in Wyoming and now resides in San Diego. Please help with my education. Thanks, Mike.
Safety Car
Joined: Dec 1999
Posts: 3,602
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From: PA
Re: Smog system?
I currently own a 1971 Lt1, match #'s. Did all early LT1's have smog?
To answer your question, yes your 1971 LT-1 (in fact all LT-1s built between 1970-1972) were equipped with the Air Injection Reactor system... Better known as the "smog pump".
The system itself consisted of the previously mentioned pump, a diverter valve, two high temperature hoses running from the diverter valve to a set of check valves, and a pair of manifold "trees" that were installed on the exhaust manifolds as well as connected to the check valves. Also included, but not visible are eight manifold tubes which are installed in threaded holes in the exhaust manifolds and secured by the manifold trees when installed
The belt for the LT-1 A.I.R. setup ran from a pulley on the pump to another pulley installed on the water pump. This was a seperate pulley that was installed in front of the standard small block two groove pulley. Since it is only used to run the belt for the A.I.R. pump, it is quite possible that a previous owner removed it.
The pulley is readily available in the used parts market should you decide to reinstall the A.I.R. system.
Enjoy the LT-1!
Regards,
