Re: How to add a PCV Valve to a 1949 Packard

Posted by TxGoat On 2023/8/6 10:50:12

Old cars that are in good condition and kept well tuned do not emit huge amounts of pollutants.

Older, lower compression engines do not emit significant amounts of NOX, and a well tuned engine in good condition will not emit huge amounts of unburned fuel.

Leaded fuel, unfortunately, is not available in the Land of The Free.

Fuel systems on old cars will emit fuel vapor in hot weather.

This could be minimized, at considerable expense, by converting to fuel injection and a closed, non-vented fuel system.

The best course is to get your older car in the best condition you can, and keep it well tuned. Be sure that automatic chokes, thermostats, manifold heat systems, etc, are working properly.

Beyond that, don't start the car unless you are going to drive it, preferably for 10 miles or more. Emissions are lowest and fuel mileage the highest when the engine and driveline are fully warmed up and operating on the highway or in light traffic at moderate speeds.

A car in good condition and proper adjustment does not need more than 1 or 2 minutes of "warm up" even in cold weather. Excess warmup is wasteful and detrimental to the engine.


Habits that contribute to minimal emissions and maximum fuel mileage also contribute to long, trouble-free vehicle life.