Original 1969 Camaros likely used a 7-16 PSI radiator cap. However, many owners upgrade to a higher pressure cap (e.g., 13-16 PSI) to improve cooling efficiency, especially with performance modifications. A higher pressure raises the boiling point of the coolant, allowing for better heat dissipation.
Crucially: Don't just choose the highest pressure cap you can find. Using a cap with too much pressure can over-stress components in the cooling system, leading to leaks and damage.
The best approach is to:
1. Check your original owner's manual (if you have it). It might specify the recommended pressure.
2. Examine the existing radiator cap. The pressure rating will be stamped on it. This is a good starting point.
3. Consult a reputable Camaro parts supplier or restoration shop. They can advise you based on your specific engine and modifications.
Choosing the right cap pressure is a balancing act between improved cooling and system longevity. Start with a pressure similar to the original, and consult experts if you're unsure.
