Nismo 1.3 Bar Radiator Cap (21430-RS012) - Nissan A31, M35, R31, R32, R33, R34, RNN14, S12, S13, S14, S15, V35, WC34, Z32 & Z33.
The NISMO Racing Radiator Cap maintains higher internal pressure in the cooling system than the standard cap (valve opening pressure : 0.9kg/cm2 *1.2kg/cm2 for Z32). It prevents the coolant from easily boiling and vaporising (the boiling point is approximately 6℃ higher than the standard cap’s 0.9kg/cm2 threshold) and improves cooling efficiency. The NISMO Racing Radiator Cap can also be used on vehicles with a small radiator cap (external diameter 45).
- Because the NISMO Racing Radiator Cap maintains high pressure in the cooling system, be sure to inspect the radiator and hoses before installing the cap to be certain that they are not damaged and that there are no leaks. Cars are particularly prone to problems due to wear. Even if your radiator and hoses appear to be working fine at low pressure, flaws may appear at higher pressure.
- Cap can be used on vehicles with a small radiator cap (external diameter φ45).
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