Is the Oldsmobile 403 a big block engine?
Oldsmobile vehicles equipped with the 403 CID: Buick vehicles equipped with the 403 CID: Pontiac vehicles equipped with the 403 CID: The primary issue with the Olds 403 is its wide bore. Remember, it’s not a big block, and so its large cylinders are too close together for proper cooling.
Why does my Oldsmobile 403 run so hot?
The Olds 403 has a tendency to run hot due to thin cylinder walls. Adding a performance radiator, water pump, and thermostat can reduce problems with overheating. Though if the block is rusty, it may need to be torn apart and cleaned.
What was the manifold change on a Olds 403?
The manifold change helped the low end a lot. Next came the $$$ stuff. First was 3.21 gears and a new carrier. Then it was ported heads, headers, a Mondello cam lifters, etc.
Are there any issues with the Olds 403?
Buick vehicles equipped with the 403 CID: Pontiac vehicles equipped with the 403 CID: The primary issue with the Olds 403 is its wide bore. Remember, it’s not a big block, and so its large cylinders are too close together for proper cooling. These engines are known for overheating and, in severe cases, blowing head gaskets.
Oldsmobile vehicles equipped with the 403 CID: Buick vehicles equipped with the 403 CID: Pontiac vehicles equipped with the 403 CID: The primary issue with the Olds 403 is its wide bore. Remember, it’s not a big block, and so its large cylinders are too close together for proper cooling.
The Olds 403 has a tendency to run hot due to thin cylinder walls. Adding a performance radiator, water pump, and thermostat can reduce problems with overheating. Though if the block is rusty, it may need to be torn apart and cleaned.
What was the bore of the Olds 403?
The Olds 403 was designed to be a big block in a small-block package. As a result, it has a bore of 4.351 inches (110.5 mm), giving it one of the widest bores of any factory small-block V8. Oldsmobile discontinued the 403 after the 1979 model year. General Motors used the Olds 403 as a ‘corporate engine’ across its line of brands.
What kind of engine does an Oldsmobile have?
General Motors used the Olds 403 as a ‘corporate engine’ across its line of brands. Oldsmobile, Pontiac, Buick, and GMC offered the Olds 403 in passenger cars and RVs. Is the Olds 403 a Good Motor?