{"id":7199,"date":"2026-06-16T11:27:56","date_gmt":"2026-06-16T11:27:56","guid":{"rendered":"http:\/\/australianholden.com\/?p=7199"},"modified":"2026-06-21T12:18:13","modified_gmt":"2026-06-21T12:18:13","slug":"early-holden-cooling-system-problems-common-causes-symptoms-and-solutions","status":"publish","type":"post","link":"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/early-holden-cooling-system-problems-common-causes-symptoms-and-solutions\/","title":{"rendered":"Early Holden Cooling System Problems"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">One of the most common complaints among early Holden owners is overheating. Whether you&#8217;re driving a 48-215, FJ, FE, FC, FB, EK, EJ, EH, HD, HR, HK, HT or HG, cooling system issues can quickly turn an enjoyable weekend drive into a frustrating roadside breakdown.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When these vehicles were new, they were designed to operate in an Australia with lower speed limits, lighter traffic and less demanding driving conditions. Fast forward 60 or 70 years, and many of these cars are now running modified engines, air conditioning systems, automatic transmissions or spending long periods stuck in modern traffic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The result? Cooling systems that were once perfectly adequate can begin to struggle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The good news is that most early Holden cooling problems follow predictable patterns. Understanding the causes, symptoms and available upgrades can dramatically improve reliability and prevent expensive engine damage.<\/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 : \"FJ 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 Suffer Cooling Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Early Holden cooling systems were simple and effective for their time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Most models featured:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Brass and copper radiators<\/li>\n\n\n\n<li>Belt-driven water pumps<\/li>\n\n\n\n<li>Mechanical engine fans<\/li>\n\n\n\n<li>Thermostat-controlled coolant flow<\/li>\n\n\n\n<li>Pressurised cooling systems<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">While robust, decades of corrosion, neglect and wear mean that many cooling systems are now operating far below their original efficiency.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Even a perfectly restored Grey Motor or Red Motor can overheat if the cooling system isn&#8217;t functioning properly.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">The Most Common Symptom: Overheating<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Overheating remains the number one cooling system complaint among early Holden owners.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Typical symptoms include:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temperature gauge climbing above normal<\/li>\n\n\n\n<li>Coolant loss<\/li>\n\n\n\n<li>Steam from radiator<\/li>\n\n\n\n<li>Boiling coolant<\/li>\n\n\n\n<li>Overflow bottle filling excessively<\/li>\n\n\n\n<li>Engine running rough when hot<\/li>\n\n\n\n<li>Coolant smell after driving<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ignoring overheating can quickly lead to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Head gasket failure<\/li>\n\n\n\n<li>Cracked cylinder heads<\/li>\n\n\n\n<li>Warped cylinder heads<\/li>\n\n\n\n<li>Piston damage<\/li>\n\n\n\n<li>Severe engine wear<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Blocked Radiators<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">One of the biggest causes of overheating in early Holdens is a partially blocked radiator.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Many original radiators are now more than half a century old.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Over time:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rust accumulates internally<\/li>\n\n\n\n<li>Sediment settles in cooling passages<\/li>\n\n\n\n<li>Coolant flow becomes restricted<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The radiator may still appear fine externally while cooling performance is dramatically reduced.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Warning signs<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vehicle runs hot at highway speeds<\/li>\n\n\n\n<li>Cool spots on radiator core<\/li>\n\n\n\n<li>Discoloured coolant<\/li>\n\n\n\n<li>Poor cooling in summer<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Best Radiator Flush<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Nulon Radiator Flush<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before replacing expensive components, a quality radiator flush can often restore cooling performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Removes scale and corrosion<\/li>\n\n\n\n<li>Improves coolant flow<\/li>\n\n\n\n<li>Cleans radiator passages<\/li>\n\n\n\n<li>Helps restore efficiency<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many owners are surprised by how much debris can accumulate inside an ageing cooling system.<\/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;Nulon<\/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 : \"Nulon\",\nfu_ebay_query : \"Nulon Radiator flush\",\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\">Corroded Engine Water Jackets<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A problem unique to many Grey Motors and early Red Motors is corrosion inside the engine block itself.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Decades of neglected coolant changes often leave significant rust deposits inside the water jackets.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Persistent overheating<\/li>\n\n\n\n<li>Brown coolant<\/li>\n\n\n\n<li>Restricted coolant circulation<\/li>\n\n\n\n<li>Uneven engine temperatures<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Unfortunately, severe internal corrosion often requires substantial cleaning during an engine rebuild.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Thermostat Failures<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The thermostat plays a critical role in regulating coolant flow.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When functioning correctly, it allows the engine to warm up quickly and then maintains a stable operating temperature.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common failures<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Thermostat stuck closed<\/li>\n\n\n\n<li>Thermostat opening late<\/li>\n\n\n\n<li>Incorrect temperature rating<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rapid overheating<\/li>\n\n\n\n<li>Temperature fluctuations<\/li>\n\n\n\n<li>Slow warm-up<\/li>\n\n\n\n<li>Inconsistent gauge readings<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Fortunately, thermostats are inexpensive and easy to replace.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Replacement Thermostat<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Tridon High Flow Thermostat<\/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>Reliable operation<\/li>\n\n\n\n<li>Quality construction<\/li>\n\n\n\n<li>Suitable for classic Holdens<\/li>\n\n\n\n<li>Available in various temperature ratings<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A quality thermostat is one of the cheapest cooling upgrades available.<\/p>\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. 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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\">Water Pump Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Water pumps are often overlooked until they fail completely.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Over time, bearings wear, seals deteriorate and impeller efficiency declines.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Coolant leaks<\/li>\n\n\n\n<li>Grinding noises<\/li>\n\n\n\n<li>Wobbling pulley<\/li>\n\n\n\n<li>Overheating at low speeds<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many early Holden water pumps have been rebuilt multiple times during their lifespan.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A worn pump may still function, but reduced coolant circulation can contribute significantly to overheating.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Mechanical Fan Limitations<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The original engine-driven fans work surprisingly well when everything is in good condition.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, modern driving conditions can expose their limitations.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common issues<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduced airflow in traffic<\/li>\n\n\n\n<li>Inefficient fan blades<\/li>\n\n\n\n<li>Increased engine temperatures when stationary<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vehicles fitted with:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Air conditioning<\/li>\n\n\n\n<li>Modified engines<\/li>\n\n\n\n<li>Automatic transmissions<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">often benefit from additional airflow.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Cooling Upgrade<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Davies Craig Thermatic Electric Fan Kit<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Electric fans have become one of the most popular upgrades among Holden enthusiasts.<\/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>Reduced traffic overheating<\/li>\n\n\n\n<li>Better cooling consistency<\/li>\n\n\n\n<li>Improved efficiency<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For many owners, an electric fan solves overheating issues that mechanical repairs alone cannot.<\/p>\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;Davies Craig Thermatic Fan Kit<\/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      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A healthy cooling system not only protects your engine\u2014it ensures your Holden remains enjoyable to drive for decades to come.<\/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\/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 Oils for Early Holden Engines<\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/early-holden-rust-problems-common-trouble-spots-warning-signs-and-how-to-fix-them\/\" type=\"post\" id=\"7191\">Early Holden Rust Problems<\/a><\/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 Radiators for Early Holdens<\/li>\n\n\n\n<li>Best Coolants for Holden Grey Motors<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of the most common complaints among early Holden owners is overheating. Whether you&#8217;re driving a 48-215, FJ, FE, FC, FB, EK, EJ, EH, HD, HR, HK, HT or HG, cooling system issues can quickly turn an enjoyable weekend drive into a frustrating roadside breakdown. When these vehicles were new, they were designed to operate [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":572,"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-7199","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Early Holden Cooling System Problems - Australian Holden<\/title>\n<meta name=\"description\" content=\"One of the most common complaints among early Holden owners is overheating.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/early-holden-cooling-system-problems-common-causes-symptoms-and-solutions\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Early Holden Cooling System Problems - Australian Holden\" \/>\n<meta property=\"og:description\" content=\"One of the most common complaints among early Holden owners is overheating.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/early-holden-cooling-system-problems-common-causes-symptoms-and-solutions\/\" \/>\n<meta property=\"og:site_name\" content=\"Australian 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