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Demon Tweeks£36.00Visit shop Mishimoto Carbon Fibre 1.3 Bar Radiator Cap Small - Black Carbon Fibre, Black
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The Mishimoto 1.3 Bar Radiator Cap is designed for automotive enthusiasts and track-day drivers who need to maintain higher cooling system pressure under intense engine loads. By increasing the pressure rating compared to standard factory caps, it prevents coolant boiling and seepage during high-performance use, though users must verify their cooling system components can handle the increased pressure to avoid potential leaks elsewhere.
| Model Part Number | MMRC-13-SMCF |
|---|---|
| Brand | Mishimoto |
This cap is designed specifically for 31-32mm radiator fill necks. Please measure your radiator neck before purchasing.
Yes, but ensure your radiator and hoses are in good condition and capable of handling the increased pressure.
A higher pressure cap raises the boiling point of the coolant, helping to prevent overheating under heavy load.
No. Never remove a radiator cap while the engine is hot as it can cause severe burns from pressurized coolant.
Inspect the rubber seals every year. If you notice cracking, swelling, or poor sealing, replace the cap immediately.
Ensure the cap is fully tightened and check if the radiator fill neck diameter is exactly 31-32mm.
Check for air pockets in the cooling system (air lock) and ensure your radiator is not clogged or damaged.
Only attempt to remove the cap when the engine is cold; internal vacuum or pressure may make it difficult to turn if still hot.
Installation of the Mishimoto radiator cap is straightforward but must be done when the engine is completely cool. Simply remove the factory cap by pushing down and turning counter-clockwise, then tighten the Mishimoto unit into the 31-32mm fill neck. Before installation, inspect your radiator neck for any debris or physical damage to ensure a proper seal. Regular maintenance includes periodically checking the rubber gasket on the cap for signs of cracking or hardening. If you observe coolant residue around the cap after hard driving, double-check that the cap is fully seated and verify that your radiator neck is not warped or damaged.
