Pontiac Straight-6 engine
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Like most American automobile manufacturers, Pontiac relied on the straight-6 design for their circa-World War II automobiles.
1930s
In the 1930s, Pontiac introduced their "multi-cylinder" engine, the 208 in³ (3.4 L) straight-6.
208
The 208 in³ (3.4 L) 208 straight-6 was produced in 1935 and 1936. It was a side-valve design with a timing chain, as was popular at the time.
Pontiac/GMC
Just as was done with their later V8s, Pontiac shared their mainstream straight-6 engine with GMC for truck use. It was also a side-valve engine, and used a timing chain. Pontiac used this engine from 1937 through 1954, while GMC only used their 223 in 1938.
222
The 222 in³ (3.6 L) straight-6 was only used in Pontiac automobiles.
223
The 223 in³ (3.7 L) straight-6 was only used in GMC trucks.
239
The 239 in³ (3.9 L) straight-6 was only used in Pontiac automobiles.
215 OHV
In the mid-1960s, Pontiac revived their straight-6 for a short time. Although it was of a different displacement, this Pontiac engine was based on Chevrolet's Generation 3 straight-6.
215
The 215 in³ (3.5 L) straight-6 was produced in 1964 and 1965. It is sometimes confused with the 215 aluminum V8 used in the two years prior. It was an OHV/pushrod engine design, quite different from the previous Pontiac straight-6 engines.
1960s OHV
Another OHV straight-6 design was adopted by Pontiac the year after the 215. This was actually a rebadged Chevrolet Straight-6 for the Pontiac Firebird. This version was produced from 1966 through 1969.
230
230 in³ (3.8 L) 230 - See Chevrolet 230.
3.8 Overhead Cam Six
The Pontiac 3.8 was a SOHC engine based on the standard 230 (3.8L) Chevrolet I6 block, putting it in the avant garde of Detroit engineering; the camshaft was driven by a quiet belt instead of the usual chain, making it state of the art for the time. This engine was used on the 1967 through 1970 Pontiac Firebird. The standard engine developed 165 horsepower (123 kW), while an optional W53 version in the Firebird Sprint, with a 4-barrel Quadrajet carburetor, 10.5:1 compression, heavy-duty clutch, floor-mounted three-speed transmission, larger valves and low restriction intake and exhaust system, produced 215 horsepower (160 kW) while saving quite a bit of weight in the front of the car, compared to the V8 models. Like other Pontiac engines of the era, it was not available in Canada. The engine was introduced in 1966 as a base motor for the tempest lemans cars and had 165 BHP with the Sprint Option it produced 207 BHP with 10.5:1 Compression in 1968 the engines cubic inches were bumped up to 250 producing the 215 horsepower and also produces 20% more power than the chevrolet counterpart
250
250 in³ (4.1 L) 250 - See Chevrolet 250.
See also
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