{"product_id":"coolant-hydrometer-antifreeze-tester-dial-type","title":"Coolant Hydrometer \u0026 Antifreeze Tester – Dial Type","description":"\u003cp\u003eA dial-type coolant hydrometer for checking how much antifreeze is in your cooling system before winter. Draw a little coolant from the expansion tank into the tube, and the dial shows the freezing point of the mix, so you know whether it will protect the engine in a hard frost or needs topping up with antifreeze. Takes a minute and saves a cracked block.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePurpose: coolant density (antifreeze strength) tester\u003c\/li\u003e\n\u003cli\u003eMaterials: plastic and rubber\u003c\/li\u003e\n\u003cli\u003eOptions: standard model (13cm tube) or extended model (20cm tube)\u003c\/li\u003e\n\u003cli\u003eIn the box: 1 hydrometer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSuitable for any car or van with a water-cooled engine. The extended tube reaches deeper expansion tanks and radiator necks.\u003c\/p\u003e\n\u003cp\u003ePractical tip: only test when the engine is cold; a hot cooling system is under pressure and can scald you when the cap comes off. Rinse the tester with clean water after use so old coolant does not gum up the dial. Check the coolant level and strength as part of your pre-winter once-over: see our \u003ca href=\"\/pages\/winter-driving-checklist\"\u003ewinter driving checklist\u003c\/a\u003e.\u003c\/p\u003e","brand":"CheckMOT","offers":[{"title":"Common Style","offer_id":59016122466678,"sku":"CJYD269066301AZ","price":7.99,"currency_code":"GBP","in_stock":true},{"title":"Lengthened","offer_id":59016122499446,"sku":"CJYD269066302BY","price":7.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/7669\/4803\/files\/138aa30f-7d44-44c0-9675-72ca7e368c38.jpg?v=1792155385","url":"https:\/\/shop.checkmot.com\/products\/coolant-hydrometer-antifreeze-tester-dial-type","provider":"CheckMOT","version":"1.0","type":"link"}