1939-1953 Buick Special & Super 248 & 263 c.i. Exhaust Manifold Valve Body

Description: 1939-1953 Buick Exhaust Manifold Valve BodyFits 248 & 263 c.i. Straight 8 EnginesCast Iron / Machined as OriginalFits:1939-1953 Special (Series 40);1940-1952 Super (Series 50)Not for cars with dual carburetorsDoes not have "butterfly"Originally, Buick incorporated a “butterfly” or “flapper” in its valve bodies. Its purpose was to quickly heat the fuel mixture in the motor, particularly in cold weather. The butterfly valve is normally closed when the engine is cold. In its closed position, exhaust gas would be directed into the intake manifold, heating the fuel mixture and the surrounding area. As the engine and valve body warms, a heat sensitive spring on the side of the valve body would allow the butterfly to open, directing exhaust gas into the exhaust pipe and exiting the vehicle. The valve required regular maintenance as it often seized. If it happened to seize in the closed position, the exhaust gas would continue to heat the fuel mixture and the intake manifold, often causing poor performance, vapor lock and engine damage. Many a Buick restorer remembers having had to “hammer” the valve back and forth to get it to temporarily function. Because our cars are now used primarily for warm weather use and the need for quicker “warm ups” is not necessary, we eliminated the butterfly valve. We also eliminated the need for continual maintenance, poor performance and the possibility of engine damage due to a stuck valveSee our other listings for Buick Manifold Parts & KitsA Quality Reproduction By CARSWe Carry a Comprehensive Line of Buick Parts from 1935-1987Serving the Buick Hobby Since 1973We Ship Worldwide - In Stock Same Day ShippingCARS LLColdbuickparts205 Pearl StreetNeshanic Station, NJ 08853

Price: 379 USD

Location: Neshanic Station, New Jersey

End Time: 2024-02-17T13:41:12.000Z

Shipping Cost: 15.99 USD