Toyota 1640136030 — Radiator Cap
Overview
Radiator cap Toyota 1640136030 maintains operating pressure within the engine cooling system at 1.1 bar (108 kPa), raising the boiling point of the coolant. The unit features a stainless steel pressure relief valve assembly, a vacuum return valve, and heat-resistant EPDM rubber seals rated up to +125 °C. Outer cap diameter measures 45 mm, valve body depth is 20 mm, and lower seal diameter is 28 mm. OEM reference numbers include Toyota 16401-36030, 16401-31520, 16401-28430, and 16401-31610. Precise spring tension controls fluid transfer to and from the expansion tank during thermal expansion cycles, preventing air lock formation and localized overheating in the cylinder head.
This part fits Toyota Camry XV40, XV50, RAV4 XA30, XA40, Highlander XU40, XU50, Sienna XL30, and Avensis T270 models, alongside Lexus ES350, RX350, RX450h, and GS350 vehicles equipped with 2.0L, 2.4L, 2.5L, and 3.5L petrol engines manufactured between 2006 and 2018. Replacement is required when rubber seals harden or crack, internal valves stick open, or coolant leaks appear around the filler neck. Loss of calibrated spring resistance causes premature coolant boiling, pressure drop, and fluid loss. Replacing a worn pressure cap restores original cooling system parameters and protects radiator tanks from over-pressurisation or vacuum collapse.
Toyota 1640136030 — radiator cap. 5 offers available, starting from 30.92 USD.
Specifications
Manufacturer — Toyota. Article number — 1640136030. Name — Radiator Cap. Offers — 5. From — 30.92 USD.
Compatible cross-references
Replacements and analogues: Toyota 1640105040, Toyota 164010H060, Toyota 1640115520, Toyota 1640116020, METZGER 2141067, 3RG 82214, Ashika 330CC30, ASHIKA 330CC30, Blue Print ADM59903.
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