UNITED STATES
ENVIRONMENTAL PROTECTION AGENCY
WASHINGTON, D.C. 20460
OFFICIAL. BUSINESS
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A
Environmental News
Rice (202) 755-0344
FOR RELEASE AFTER 12;00 NOON THURSDAY. OCTOBER 21. 1976
EPA ORDERS RECALL OF 330/000 PONTIACS TO CORRECT EMISSIONS
DEFECT
Environmental Protection Agency Administrator Russell E.
Train today ordered the General Motors Corporation to recall
approximately 330,000 1974 Pontiacs in order to correct a
defect in the vehicles' emission control system.
The vehicles recalled are^those with 350 cubic inch dis-
placement (CID) and 400 CID engines equipped with 2 barrel
carburetors. These include Catalina, Lemans, Bonneville,
Ventura, Firebird, and Grand Am body styles.
The defective component is a thermal vacuum valve which
activates the Exhaust Gas Recirculation System (EGR). The EGR
system is designed to reduce the nitrogen oxide emissions to
comply with Federal standards.
In his letter to GM, Train stated:
"It is my,conclusion that sufficient data e^ist to
determine that for the approximately 330,000 1974
Pontiacs....(with the 350 and 400 CID engines) sold
by GM, a substantial number of those equipped with
Dole Thermal Vacuum Valves will exceed the Federal
standard of 3.0 gm/mile for NOx emissions withiipi
their useful life of 50,000 miles."
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Two different thermal vacuum valves were used in 1974
Pontiacs by GM. EPA's analysis of a sample of both valves
.concluded that only the valve manufactured by the Dole Divi-
sion of Eaton Corporation is defective. The Dole valve is
. :used in 195,000 of the approximately 330,000 vehicles affected
by the recall. However, all of the vehicles must be inspected
to determine- if they have the Dole Valve.
EPA's Mobile Source Enforcement Division began an investi-
gation of this matter in January of 1976. A sample of valves
was obtained in Houston and Washington, D.C. and tested by EPA.
These tests indicated that 67 percent of the Dole valves were
defective.
The valve in question is a temperature sensing device
which at certain temperatures is designed to transmit vacuum
signals to the EGR system. EPA found that the valves were not
transmitting enough vacuum to activate the EGR system. No
external symptoms are readily apparent which would enable vehicle
owners to recognize this defect.
The EPA order was issued under Section 207(c) of the Clean
Air Act. Under the order, GM must submit a plan to remedy the
problem within 45 days. GM will be required to pay for the
costs of any necessary repairs. Owners will be notified by the
company if their car is involved.
US EPA
Headquarters and Chemical Libraries
EPA West Sldg Room 3340
Mailcode 3404T
1301 Constitution Ave NW
Washinqton DC 20004
202-566-0556
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