{"id":7201,"date":"2026-06-16T11:34:43","date_gmt":"2026-06-16T11:34:43","guid":{"rendered":"http:\/\/australianholden.com\/?p=7201"},"modified":"2026-06-21T12:19:05","modified_gmt":"2026-06-21T12:19:05","slug":"early-holden-radiator-upgrade-guide-the-best-cooling-improvements-for-classic-holdens","status":"publish","type":"post","link":"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/early-holden-radiator-upgrade-guide-the-best-cooling-improvements-for-classic-holdens\/","title":{"rendered":"Early Holden Radiator Upgrade Guide"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">One of the most common upgrades performed on an early Holden isn&#8217;t a camshaft, carburettor or exhaust system\u2014it&#8217;s the radiator.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether you&#8217;re driving a 48-215, FJ, FE, FC, FB, EK, EJ, EH, HD, HR, HK, HT or HG, chances are the original cooling system is being asked to do far more than Holden engineers ever intended. Modern traffic, hotter operating conditions, modified engines, automatic transmissions and air conditioning can all place additional stress on a cooling system that was designed more than half a century ago.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The good news is that radiator technology has come a long way since the 1950s and 1960s. A carefully chosen radiator upgrade can dramatically improve cooling performance, reduce overheating problems and make your Holden far more enjoyable to drive.<\/p>\n\n\n<div id=\"fu_ebay_0\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 0 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_0\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Radiator<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_0 = null;\nvar waitForDepends_fu_ebay_0 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_0);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_0 = jQuery(\"#fu_ebay_0\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Radiator\",\nfu_ebay_query : \"FE Holden Radiator\",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 0,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_0.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Why Early Holdens Overheat<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Many owners assume overheating automatically means the radiator has failed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In reality, several factors often contribute:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Blocked radiator cores<\/li>\n\n\n\n<li>Corroded water jackets<\/li>\n\n\n\n<li>Worn water pumps<\/li>\n\n\n\n<li>Poor airflow<\/li>\n\n\n\n<li>Incorrect thermostats<\/li>\n\n\n\n<li>Modified engines<\/li>\n\n\n\n<li>Air conditioning systems<\/li>\n\n\n\n<li>Modern traffic conditions<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">However, even when all other components are functioning correctly, the original radiator can become a limiting factor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A stock radiator that worked perfectly in 1962 may struggle during a 35-degree summer day while sitting in modern stop-start traffic.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">When Should You Upgrade Your Radiator?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Not every Holden requires an aftermarket radiator.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A properly restored original radiator can often perform surprisingly well.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, upgrades become worthwhile if you experience:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Frequent Overheating<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temperature rises in traffic<\/li>\n\n\n\n<li>Coolant loss<\/li>\n\n\n\n<li>Steam after shutdown<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Modified Engine Combinations<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Triple carburettors<\/li>\n\n\n\n<li>Performance camshafts<\/li>\n\n\n\n<li>Increased compression<\/li>\n\n\n\n<li>Engine swaps<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Air Conditioning<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Air conditioning significantly increases cooling demands.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Automatic Transmission Conversions<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Additional transmission heat can impact overall cooling performance.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Option 1: Recore the Original Radiator<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">For many restorers, retaining originality is important.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A radiator recore allows you to keep the factory tanks while upgrading the internal core.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Advantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Factory appearance<\/li>\n\n\n\n<li>Improved cooling efficiency<\/li>\n\n\n\n<li>Retains originality<\/li>\n\n\n\n<li>Direct fitment<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Disadvantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Can be expensive<\/li>\n\n\n\n<li>Still limited by original design<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For concours restorations, a quality recore is often the preferred solution.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Option 2: Three-Core Copper Brass Radiator<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">One of the most popular upgrades among Holden enthusiasts is moving to a modern three-core copper brass radiator.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Increased coolant capacity<\/li>\n\n\n\n<li>Improved heat dissipation<\/li>\n\n\n\n<li>Factory-style appearance<\/li>\n\n\n\n<li>Excellent durability<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These radiators provide a noticeable improvement over tired original units while retaining a period-correct look.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Traditional Upgrade<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Triple Core Copper Brass Replacement Radiator<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Why enthusiasts choose it:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Excellent cooling performance<\/li>\n\n\n\n<li>Original appearance<\/li>\n\n\n\n<li>Suitable for Grey and Red Motors<\/li>\n\n\n\n<li>Easy installation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For many owners, this represents the ideal balance between originality and performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Best for<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Restored vehicles<\/li>\n\n\n\n<li>Weekend cruisers<\/li>\n\n\n\n<li>Mildly modified engines<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Option 3: Aluminium Radiator Upgrade<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminium radiators have become increasingly popular among Holden owners.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Modern aluminium designs typically offer:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Larger cooling capacity<\/li>\n\n\n\n<li>Improved airflow<\/li>\n\n\n\n<li>Reduced weight<\/li>\n\n\n\n<li>Better performance under load<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Advantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Excellent cooling efficiency<\/li>\n\n\n\n<li>Lightweight construction<\/li>\n\n\n\n<li>Ideal for modified vehicles<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Disadvantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Less original appearance<\/li>\n\n\n\n<li>May require mounting modifications<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For heavily modified vehicles, aluminium radiators are often the most effective solution.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Aluminium Radiator<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Alloy Performance Radiator for Early Holden Applications<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Why owners upgrade:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Improved heat transfer<\/li>\n\n\n\n<li>Larger cooling capacity<\/li>\n\n\n\n<li>Better traffic performance<\/li>\n\n\n\n<li>Suitable for engine conversions<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best for<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Modified Grey Motors<\/li>\n\n\n\n<li>Warm Red Motors<\/li>\n\n\n\n<li>V8 conversions<\/li>\n\n\n\n<li>Air-conditioned vehicles<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Option 4: Radiator and Electric Fan Combination<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Many cooling issues are actually airflow problems rather than coolant flow problems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Original engine-driven fans perform reasonably well at speed but often struggle in traffic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Combining a radiator upgrade with an electric fan frequently delivers the best results.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Improved airflow at idle<\/li>\n\n\n\n<li>Better cooling in traffic<\/li>\n\n\n\n<li>Consistent temperatures<\/li>\n\n\n\n<li>Reduced overheating risk<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Best Electric Fan Upgrade<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Davies Craig Thermatic Fan Kit<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A favourite among Australian enthusiasts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Thermostatically controlled<\/li>\n\n\n\n<li>Reliable operation<\/li>\n\n\n\n<li>Multiple sizes available<\/li>\n\n\n\n<li>Proven performance<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best for<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>City driving<\/li>\n\n\n\n<li>Summer cruising<\/li>\n\n\n\n<li>Air-conditioned vehicles<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many Holden owners report significant temperature improvements after fitting an electric fan.<\/p>\n\n\n<div id=\"fu_ebay_1\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 1 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_1\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Davies Craig Thermatic Fan Kit<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_1 = null;\nvar waitForDepends_fu_ebay_1 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_1);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_1 = jQuery(\"#fu_ebay_1\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Davies Craig Thermatic Fan Kit\",\nfu_ebay_query : \"Davies Craig Thermatic Fan Kit\",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 1,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_1.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Don&#8217;t Forget the Radiator Cap<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Many owners spend hundreds on radiators while overlooking the radiator cap.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A faulty cap can cause:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Coolant loss<\/li>\n\n\n\n<li>Reduced system pressure<\/li>\n\n\n\n<li>Overheating<\/li>\n\n\n\n<li>Boiling coolant<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Replacing an ageing cap is one of the cheapest cooling upgrades available.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Radiator Cap<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Tridon Radiator Cap<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Why it&#8217;s popular:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reliable pressure control<\/li>\n\n\n\n<li>Quality construction<\/li>\n\n\n\n<li>Widely available<\/li>\n\n\n\n<li>Affordable<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best for<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stock restorations<\/li>\n\n\n\n<li>Modified vehicles<\/li>\n\n\n\n<li>Preventative maintenance<\/li>\n<\/ul>\n\n\n<div id=\"fu_ebay_2\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 2 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_2\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Tridon<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_2 = null;\nvar waitForDepends_fu_ebay_2 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_2);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_2 = jQuery(\"#fu_ebay_2\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Tridon\",\nfu_ebay_query : \"Tridon radiator cap Holden\",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 2,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_2.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Upgrade Your Coolant Too<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A new radiator won&#8217;t perform at its best if it&#8217;s filled with poor-quality coolant.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Modern coolants provide:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Corrosion protection<\/li>\n\n\n\n<li>Water pump lubrication<\/li>\n\n\n\n<li>Improved heat transfer<\/li>\n\n\n\n<li>Longer service intervals<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Best Coolant for Early Holdens<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Penrite Classic Car Coolant<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Specifically designed for older cooling systems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Advantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Compatible with copper and brass radiators<\/li>\n\n\n\n<li>Corrosion inhibitors<\/li>\n\n\n\n<li>Suitable for classic engines<\/li>\n\n\n\n<li>Long service life<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best for<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Grey Motor Holdens<\/li>\n\n\n\n<li>Red Motor Holdens<\/li>\n\n\n\n<li>Restored vehicles<\/li>\n<\/ul>\n\n\n<div id=\"fu_ebay_3\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 3 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_3\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Penrite Classic Car Coolant<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_3 = null;\nvar waitForDepends_fu_ebay_3 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_3);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. 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Whether you&#8217;re trying to eliminate overheating, support a modified engine or simply improve reliability during summer cruising, the right radiator can transform the driving experience.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For originality-focused restorations, a quality triple-core recore often delivers excellent results. For modified vehicles, aluminium radiators and electric fan combinations provide outstanding cooling performance under modern driving conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ultimately, the best radiator upgrade depends on how you use your Holden. Match the cooling system to the vehicle&#8217;s intended purpose, maintain it properly and you&#8217;ll enjoy cooler running temperatures, improved reliability and greater confidence behind the wheel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Related Articles<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/early-holden-cooling-system-problems-common-causes-symptoms-and-solutions\/\" type=\"post\" id=\"7199\">Early Holden Cooling System Problems<\/a><\/li>\n\n\n\n<li>Best Coolants for Holden Grey Motors<\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/holden-grey-motor-issues-explained-common-problems-symptoms-and-how-to-fix-them\/\" type=\"post\" id=\"7195\">Holden Grey Motor Issues Explained<\/a><\/li>\n\n\n\n<li>Best Thermostats for Early Holdens<\/li>\n\n\n\n<li>Best Electric Fan Upgrades for Classic Holdens<\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/how-to-inspect-an-early-holden-before-buying\/\" type=\"post\" id=\"7193\">How to Inspect an Early Holden Before Buying<\/a><\/li>\n\n\n\n<li>Best Oils for Early Holden Engines<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of the most common upgrades performed on an early Holden isn&#8217;t a camshaft, carburettor or exhaust system\u2014it&#8217;s the radiator. Whether you&#8217;re driving a 48-215, FJ, FE, FC, FB, EK, EJ, EH, HD, HR, HK, HT or HG, chances are the original cooling system is being asked to do far more than Holden engineers ever [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":575,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":["post-7201","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the 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