1939-1953 Buick Special & Super Valve Body to Intake Manifold Block-off Plate

$24.5 Buy It Now or Best Offer
free,30-Day Returns

Seller Store oldbuickparts
(31395) 98.8%,

Location: Neshanic Station, New Jersey
Ships to: US,
Item: 184953199591

Restocking Fee:No
Return shipping will be paid by:Seller
Returns Accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money back or replacement (buyer’s choice)
Interchange Part Number:1946 46 1947 47 1948 48 1949 49 1950 50 1951 51 19,1952 52 1953 53,1939 39 1940 40 1941 41 1942 42
Manufacturer Part Number:n/a
Other Part Number:buick special series 40 series 50
CARS:CARS
Vintage Part:Yes

1939-1953 Buick Valve Body to Intake Manifold Block-off PlateFits 248 & 263 c.i. Straight 8 EnginesSolid CopperFits:1939-1953 Special (Series 40);1940-1952 Super (Series 50)Not for cars with dual carburetorsOriginally, Buick incorporated a “butterfly” or “flapper” in its exhaust manifold 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 on the valve bodies we sell (see listing #174844730417). We also eliminated the need for continual maintenance, poor performance and the possibility of engine damage due to a stuck valve. Following this logic, we have produced this copper block-off plate. It closes the path of exhaust gases into the intake manifold and diverts exhaust gases directly out the exhaust pipe. The end result is a cooler intake manifold chamber where air/fuel mixtures prepare to burn. This can be especially useful where highly volatile ethanol-blended fuels are used and/or vapor lock occurs.See 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

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