{"id":278,"date":"2020-05-10T11:46:36","date_gmt":"2020-05-10T11:46:36","guid":{"rendered":"http:\/\/australianholden.com\/?page_id=278"},"modified":"2026-06-23T06:19:23","modified_gmt":"2026-06-23T06:19:23","slug":"hq-holden-common-issues","status":"publish","type":"page","link":"https:\/\/australianholden.com\/index.php\/home\/h-series\/hq-holden\/hq-holden-common-issues\/","title":{"rendered":"HQ Holden Common Issues"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/australianholden.com\/index.php\/australian-holden\/h-series\/\">H Series Home<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/australianholden.com\/index.php\/australian-holden\/h-series\/hq-holden\/\">HQ Holden<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/amzn.to\/4cqplxi\">HQ HJ HX HZ Repair Manual<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The HQ Holden is where things really changed for Holden.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Released in 1971, the HQ was a massive leap forward from everything that came before it. Bigger, smoother, more modern in design, and built on an entirely new platform, it set the tone for Holden\u2019s entire mid-size and full-size lineup for years to come.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Today, the HQ is a genuine classic in every sense of the word. Clean survivors are getting harder to find, and restored examples are now highly sought after at shows, auctions and private collections.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here are the most common HQ Holden problems owners and buyers should know about.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Rust Problems<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rust is, without question, the biggest issue affecting HQ Holdens today.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These cars were built in the early 1970s when rust protection was still relatively basic, and many were used hard from day one. Farm work, coastal environments, long-term outdoor storage and decades of use have all contributed to widespread corrosion issues.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By now, rust can be found in almost every body panel if a car has not been well preserved.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common rust areas include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>lower doors<\/li>\n\n\n\n<li>rear quarter panels<\/li>\n\n\n\n<li>floor pans<\/li>\n\n\n\n<li>boot floors<\/li>\n\n\n\n<li>chassis rails<\/li>\n\n\n\n<li>windscreen and rear window surrounds<\/li>\n\n\n\n<li>sills and jacking points<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Utes and panel vans are often the worst affected due to heavy-duty work use and constant exposure to the elements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common symptoms<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bubbles forming under paint<\/li>\n\n\n\n<li>Soft or weakened floor sections<\/li>\n\n\n\n<li>Water leaks into cabin or boot<\/li>\n\n\n\n<li>Rust perforation hidden under carpets<\/li>\n\n\n\n<li>Thick filler masking previous repairs<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A genuinely solid HQ shell is now one of the most valuable starting points for restoration because proper rust repair is time-consuming and expensive.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related guide<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/hq-hj-hx-hz-and-wb-holden-rust-problems\/\" type=\"post\" id=\"7316\">HQ, HJ, HX, HZ and WB Holden Rust Problems<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/how-to-inspect-a-hq-hj-hx-hz-or-wb-holden-before-buying\/\" type=\"post\" id=\"7318\">How to Inspect a HQ HJ, HX, HZ, WB Holden Before Buying<\/a><\/li>\n\n\n\n<li>Best Rust Protection Products for Classic Holdens<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Holden Six &amp; V8 Engine Wear<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The HQ was offered with Holden\u2019s long-running straight-six engines as well as the famous Aussie V8 range, including the 253 and 308.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These engines are known for their simplicity and toughness, but decades of use mean wear is now inevitable across most surviving examples.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common issues include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>oil leaks from aged gaskets and seals<\/li>\n\n\n\n<li>worn timing chains<\/li>\n\n\n\n<li>carburettor tuning and fuel delivery issues<\/li>\n\n\n\n<li>overheating under load<\/li>\n\n\n\n<li>general loss of compression in tired engines<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many HQ engines have also been rebuilt, modified or swapped over the years, meaning condition varies significantly from car to car.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common symptoms<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rough idle or hesitation<\/li>\n\n\n\n<li>Hard starting, especially cold<\/li>\n\n\n\n<li>Excessive oil consumption<\/li>\n\n\n\n<li>Reduced power and throttle response<\/li>\n\n\n\n<li>Engine noise from worn internal components<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The upside is that these engines remain simple to rebuild and enjoy strong parts support in Australia.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related guide<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/20\/holden-202-engine-issues-explained\/\" type=\"post\" id=\"7311\">Red Engine Problems<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/holden-253-308-v8-issues-explained\/\" type=\"post\" id=\"7340\">Holden 253 &amp; 308 V8 Issues Explained<\/a><\/li>\n\n\n\n<li>Best Oils for Classic Holden Engines<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Cooling System Problems<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cooling system issues are one of the most common and preventable problems in HQ Holdens.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Radiators clog internally over time, hoses harden and crack, thermostats fail, and water pumps eventually wear out after decades of use. Once cooling efficiency drops, overheating becomes a serious risk \u2014 particularly in Australian summer conditions or under load.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Many surviving HQs are still running original or decades-old cooling components.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common symptoms<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temperature gauge rising in traffic<\/li>\n\n\n\n<li>Coolant leaks under the vehicle<\/li>\n\n\n\n<li>Steam from engine bay<\/li>\n\n\n\n<li>Sweet smell of coolant<\/li>\n\n\n\n<li>Heater not functioning correctly<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">An overheating Holden engine can quickly turn a small issue into a major rebuild.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related guide<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/hq-hj-hx-hz-and-wb-holden-cooling-system-problems\/\" type=\"post\" id=\"7320\">HQ, HJ, HX, HZ and WB Holden Cooling System Problems<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/hq-hj-hx-hz-and-wb-radiator-upgrade-guide\/\" type=\"post\" id=\"7322\">HQ, HJ, HX, HZ and WB Radiator Upgrade Guide<\/a><\/li>\n\n\n\n<li>Best Coolants for Classic Holden Engines<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. Transmission Wear (Trimatic &amp; Turbo 400)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The HQ used both Trimatic and Turbo 400 automatic transmissions depending on engine and specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While both were strong units in their time, age, heat and neglect inevitably lead to wear.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Many HQ Holdens spent decades:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>towing caravans and trailers<\/li>\n\n\n\n<li>hauling heavy loads<\/li>\n\n\n\n<li>cruising long distances<\/li>\n\n\n\n<li>or simply running without consistent transmission servicing<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">As a result, wear is extremely common today.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common symptoms<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Slipping between gears<\/li>\n\n\n\n<li>Delayed engagement<\/li>\n\n\n\n<li>Harsh or inconsistent shifting<\/li>\n\n\n\n<li>Transmission fluid leaks<\/li>\n\n\n\n<li>Shuddering under acceleration<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Transmission rebuilds are common in restored HQs or high-mileage vehicles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related guide<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/hq-hj-hx-hz-and-wb-holden-transmission-problems\/\" type=\"post\" id=\"7323\">HQ, HJ, HX, HZ and WB Holden Transmission Problems<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/trimatic-common-issues-explained\/\" type=\"post\" id=\"7314\">Trimatic Common Issues Explained<\/a><\/li>\n\n\n\n<li>Best Transmission Fluids for Classic Holdens<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5. Suspension &amp; Steering Wear<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The HQ introduced a much more modern ride compared to earlier Holden models, but worn suspension components can make them feel very different today.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After decades of use, most HQs now suffer from worn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>shock absorbers<\/li>\n\n\n\n<li>control arm bushes<\/li>\n\n\n\n<li>steering linkages<\/li>\n\n\n\n<li>sway bar components<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Cars that were used for towing or heavy work often show even more wear.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common symptoms<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Loose or wandering steering feel<\/li>\n\n\n\n<li>Clunking noises over bumps<\/li>\n\n\n\n<li>Uneven tyre wear<\/li>\n\n\n\n<li>Excessive body roll<\/li>\n\n\n\n<li>Steering vibration at speed<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A full suspension refresh can completely transform how an HQ drives and feels on the road.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related guide<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/hq-hj-hx-hz-and-wb-holden-suspension-problems\/\" type=\"post\" id=\"7326\">HQ, HJ, HX, HZ and WB Holden Suspension Problems<\/a><\/li>\n\n\n\n<li>Best Suspension Upgrades for HQ. HJ, HX, HZ and WB Holdens<\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/hq-hj-hx-hz-and-wb-holden-steering-system-repair-guide\/\" type=\"post\" id=\"7330\">HQ, HJ, HX, HZ, WB Steering System Repair Guide<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>6. Electrical Problems<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Electrical systems in classic Holdens were simple, but time introduces its own set of challenges.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the HQ, wiring looms, switches and connectors are now well into their second life cycle. Add decades of aftermarket modifications, and electrical gremlins become almost expected.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common issues include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>charging system faults<\/li>\n\n\n\n<li>faulty gauges or dash lights<\/li>\n\n\n\n<li>intermittent starting issues<\/li>\n\n\n\n<li>blown fuses<\/li>\n\n\n\n<li>poor earth connections<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common symptoms<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flickering headlights or dash lighting<\/li>\n\n\n\n<li>Flat batteries after sitting<\/li>\n\n\n\n<li>Gauges behaving erratically<\/li>\n\n\n\n<li>Random electrical faults<\/li>\n\n\n\n<li>Starting inconsistencies<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many issues trace back to ageing wiring or poor grounding rather than component failure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related guide<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/hq-hj-hx-hz-and-wb-holden-electrical-problems\/\" type=\"post\" id=\"7332\">HQ, HJ, HX, HZ and WB Holden Electrical Problems<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/hq-hj-hx-hz-and-wb-holden-interior-restoration-guide\/\" type=\"post\" id=\"7334\">HQ, HJ, HX, HZ and WB Starting Issues Guide<\/a><\/li>\n\n\n\n<li>Best Battery Upgrades for Classic Holdens<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>7. Oil Leaks<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Oil leaks are practically part of classic Holden ownership, and the HQ is no exception.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As seals and gaskets age, oil slowly finds its way out of multiple areas of the engine. While small leaks are often tolerated, larger leaks can lead to bigger mechanical issues if ignored.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common leak areas include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>rocker cover gaskets<\/li>\n\n\n\n<li>rear main seals<\/li>\n\n\n\n<li>sump gaskets<\/li>\n\n\n\n<li>timing cover seals<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common symptoms<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil spots under vehicle<\/li>\n\n\n\n<li>Burning oil smell after driving<\/li>\n\n\n\n<li>Dirty engine bay and underbody<\/li>\n\n\n\n<li>Smoke near exhaust components<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A well-sealed engine is always worth maintaining properly on a classic Holden.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related guide<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/20\/holden-red-engine-oil-leak-guide-2\/\" type=\"post\" id=\"7247\">Holden Red 6 Oil Leak Guide<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/20\/early-holden-v8-oil-leak-problems-explained\/\" type=\"post\" id=\"7306\">Holden V8 Oil Leak Problems Explained<\/a><\/li>\n\n\n\n<li>Best Engine Oils for Classic Holden Engines<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>8. Interior Wear &amp; Ageing Trim<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HQ interiors were built for durability rather than long-term preservation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After 50+ years, most surviving interiors show significant wear unless they\u2019ve been restored.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common issues include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>cracked dashboards<\/li>\n\n\n\n<li>sagging roof lining<\/li>\n\n\n\n<li>faded or brittle plastics<\/li>\n\n\n\n<li>worn seat upholstery<\/li>\n\n\n\n<li>loose interior trim<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Utes and work vehicles are typically the worst affected, while Statesman models often survive in better condition due to more careful ownership.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common symptoms<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sun-cracked dashboard surfaces<\/li>\n\n\n\n<li>Interior rattles and loose panels<\/li>\n\n\n\n<li>Sagging headliner<\/li>\n\n\n\n<li>Torn or worn seat material<\/li>\n\n\n\n<li>General cabin ageing<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Good original interior parts are becoming increasingly rare and valuable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related guide<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/hq-hj-hx-hz-and-wb-holden-interior-restoration-guide\/\" type=\"post\" id=\"7334\">HQ, HJ, HX, HZ and WB Holden Interior Restoration Guide<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/17\/hq-hj-hx-hz-and-wb-holden-roof-lining-repair-guide\/\" type=\"post\" id=\"7337\">HQ, HJ, HX, HZ, WB Roof Lining Repair Guide<\/a><\/li>\n\n\n\n<li>Best Interior Products for Classic Holdens<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Is the HQ Holden Reliable?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a vehicle from the early 1970s, the HQ Holden remains impressively durable, fewer complex systems mean fewer failure points compared to modern vehicles.<\/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;<\/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. 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Released in 1971, the HQ was a massive leap forward from everything that came before it. Bigger, smoother, more modern in design, and built on an entirely new platform, it set the tone for [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":580,"parent":35,"menu_order":7,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"class_list":["post-278","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>HQ Holden Common Issues - Australian Holden<\/title>\n<meta name=\"description\" content=\"For a vehicle from the early 1970s, the HQ Holden remains impressively durable, fewer complex systems mean fewer failure points compared to modern vehicles.\" \/>\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\/home\/h-series\/hq-holden\/hq-holden-common-issues\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HQ Holden Common Issues - 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