Radiator cap for 350 Chevrolet which one is the right pressure engine?

There's no single "right" pressure for a 1935-1960s Chevrolet 350 radiator cap. The correct pressure depends on the specific year and model of the vehicle, as well as any modifications made to the cooling system. Original 350s did not have a pressure cap; they were typically just a simple overflow tank. The later small-block 350 (introduced in the late 1960s) used pressure caps, but the pressure rating varied.

To find the correct pressure rating, you need to:

1. Identify the year and model of your vehicle: This is crucial as cooling system designs changed over time.

2. Check your existing radiator cap (if you have one): The pressure rating is usually stamped on the cap itself (e.g., 13 PSI, 16 PSI). This is your best starting point.

3. Consult a Chevrolet parts catalog or repair manual specific to your vehicle's year and model: These manuals will specify the correct radiator cap pressure.

4. If you can't find the information above, consult with a reputable auto parts store: Provide them with the year, make, and model of your vehicle. They can cross-reference the information to find the correct radiator cap.

Using the wrong pressure cap can lead to problems: Too low a pressure can lead to overheating, while too high a pressure can cause the system to leak or even rupture. Therefore, finding the correct pressure is essential.