{"product_id":"vw-radiator-cap-118030","title":"radiator cap - VW","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAkron-Malò Coolant Expansion Tank Cap (118030)\u003c\/strong\u003e is an original-equipment-quality pressure-regulating cooling system safety component engineered by Akron-Malò. Positioned directly onto the threads of the coolant reservoir tank, its primary operational function is to seal the cooling system and maintain a calibrated internal operating pressure of precisely 1.20 bar. By holding the coolant loop under static pressure, it raises the physical boiling point of the water-glycol mixture to over 100°C, preventing localized boiling around the cylinder walls and ensuring highly efficient engine thermal management. The cap contains a spring-loaded dual-valve safety system: the pressure relief valve cracks open to bleed off dangerous pressure spikes before they fracture plastic radiator tanks or blow hoses, while the vacuum relief valve admits atmospheric air as the engine cools down to prevent the negative pressure from collapsing the rubber hoses. Over years of service, chemical corrosion from old coolant and constant thermal cycles weaken the internal spring or swell the rubber gasket, leading to early pressure bleed-off (causing premature boiling and fluid loss) or dangerous pressure build-up.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Akron-Malò\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eItem Number:\u003c\/strong\u003e 118030\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Condition:\u003c\/strong\u003e New\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComponent Classification:\u003c\/strong\u003e Engine Cooling Loop Pressure Relief Safety Sealing Cap\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-temperature engineered composite polymer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOpening Pressure [bar]:\u003c\/strong\u003e 1.20 (Calibrated specifically for mid-generation VAG cooling pressures)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting Interface:\u003c\/strong\u003e Threaded Screw Connection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSealing Component:\u003c\/strong\u003e Includes a pre-fitted, high-grade elastomeric perimeter O-ring seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eVehicle Compatibility\u003c\/h3\u003e\n\u003cp\u003eThis 1.20 bar threaded expansion cap profile is precision-molded to match the factory cooling loop specifications and reservoir geometries across mainstream Volkswagen Audi Group (VAG) passenger platforms from the late 1970s through the mid-1990s:\u003c\/p\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #f2f2f2;\"\u003e\n      \u003cth\u003eCar Model \/ Platform\u003c\/th\u003e\n      \u003cth\u003eCompatible Engine Configurations \u0026amp; Layouts\u003c\/th\u003e\n      \u003cth\u003eEngine Displacement Range\u003c\/th\u003e\n      \u003cth\u003eYear of Manufacture\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eAudi 80 \u0026amp; 90 (B2, B3, B4) \/ Coupe \/ Cabriolet\u003c\/td\u003e\n      \u003ctd\u003e1.6 \/ 1.8 \/ 2.0 4-Cyl and classic 2.2 \/ 2.3 5-Cylinder Petrol models\u003c\/td\u003e\n      \u003ctd\u003e1595 - 2309 cc\u003c\/td\u003e\n      \u003ctd\u003e1978 - 1996\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eAudi 100 \u0026amp; 200 (C2, C3, C4) \/ A6 C4\u003c\/td\u003e\n      \u003ctd\u003e1.9 \/ 2.0 \/ 2.2 Turbo \/ 2.3 5-Cyl and early 2.6 V6 longitudinal layouts\u003c\/td\u003e\n      \u003ctd\u003e1921 - 2598 cc\u003c\/td\u003e\n      \u003ctd\u003e1976 - 1997\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVW Golf Mk2 (19E, 1G1) \/ Jetta Mk2\u003c\/td\u003e\n      \u003ctd\u003e1.3 \/ 1.6 \/ 1.8 Petrol and 1.6 D \/ 1.6 TD Diesel lines \u003cbr\u003e\u003cem\u003e(Early models utilizing the black or brown VAG threaded cap pattern)\u003c\/em\u003e\n\u003c\/td\u003e\n      \u003ctd\u003e1272 - 1781 cc\u003c\/td\u003e\n      \u003ctd\u003e1983 - 1992\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVW Passat B2 (32B) \/ B3 \u0026amp; B4 (35I)\u003c\/td\u003e\n      \u003ctd\u003e1.6 \/ 1.8 \/ 2.0 4-Cylinder and 2.2 5-Cylinder configurations\u003c\/td\u003e\n      \u003ctd\u003e1595 - 2226 cc\u003c\/td\u003e\n      \u003ctd\u003e1980 - 1993\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVW Transporter T3 \u0026amp; T4 Bus \/ Van\u003c\/td\u003e\n      \u003ctd\u003e1.6 TD \/ 1.7 D \/ 1.9 \/ 2.1 Waterboxer (WBX) and early T4 petrol loops\u003c\/td\u003e\n      \u003ctd\u003e1588 - 2109 cc\u003c\/td\u003e\n      \u003ctd\u003e1979 - 1995\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cblockquote\u003e⚠️ \u003cstrong\u003eThermal Pressure \u0026amp; Reservoir Thread Warning:\u003c\/strong\u003e **NEVER attempt to unthread this expansion cap while the engine is hot or at operating temperature.** The cooling jacket is highly pressurized; breaking the seal prematurely causes an instantaneous pressure drop that triggers explosive boiling, spraying scalding coolant and steam which can inflict severe injury. Always let the vehicle rest for a minimum of one hour until the hoses are cool to the touch. Before spinning the new Akron-Malò cap home, take a clean rag and scrape any crystallized coolant crust or mineral scale out from the reservoir's plastic threads. If these plastic threads are nicked or distorted, the cap will sit cocked, letting pressure bleed out slowly and causing nagging, untraceable coolant loss.\u003c\/blockquote\u003e\n\n\u003ch3\u003eOriginal Equipment Manufacturer (OEM) Reference Numbers\u003c\/h3\u003e\n\u003cp\u003eThis premium replacement 1.20 bar coolant sealing cap cross-references directly with, or serves as a factory-correct swap for, the following original factory catalog numbers and premium industry alternatives:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVAG (VW \/ AUDI \/ SEAT \/ SKODA):\u003c\/strong\u003e 443121321, 443 121 321, 811121321, 811 121 321, 171121321D, 171 121 321 D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFEBI BILSTEIN (Interchange Reference):\u003c\/strong\u003e 01211, 1211\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMEYLE (Interchange Reference):\u003c\/strong\u003e 100 121 0042, 1001210042\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTOPRAN (Interchange Reference):\u003c\/strong\u003e 102 745, 102745\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVAICO (Interchange Reference):\u003c\/strong\u003e V10-0014\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGATES (Interchange Reference):\u003c\/strong\u003e RC217\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"malo","offers":[{"title":"Default Title","offer_id":57537971618175,"sku":"118030","price":5.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1005\/7252\/9023\/files\/3e3f3626-41ad-0540-018c-b801b1ba622c-cr-100x100.jpg?v=1778859282","url":"https:\/\/klassik357.eu\/products\/vw-radiator-cap-118030","provider":"Klassik357 - Classic and retro car parts","version":"1.0","type":"link"}