{"id":7195,"date":"2026-06-16T11:18:33","date_gmt":"2026-06-16T11:18:33","guid":{"rendered":"http:\/\/australianholden.com\/?p=7195"},"modified":"2026-06-21T12:16:57","modified_gmt":"2026-06-21T12:16:57","slug":"holden-grey-motor-issues-explained-common-problems-symptoms-and-how-to-fix-them","status":"publish","type":"post","link":"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/holden-grey-motor-issues-explained-common-problems-symptoms-and-how-to-fix-them\/","title":{"rendered":"Holden Grey Motor Issues Explained"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Holden Grey Motor is one of the most iconic engines in Australian motoring history. Introduced in the original 48-215 Holden in 1948 and remaining in production until the arrival of the Red Motor in 1963, the humble Grey Motor powered everything from family sedans and panel vans through to taxis, race cars and speedway specials.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Simple, reliable and easy to work on, the Grey Motor helped motorise Australia. However, the youngest Grey Motor is now more than 60 years old, and age inevitably brings its own set of challenges.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;re restoring an early Holden, considering buying one, or simply trying to keep your Grey Motor running at its best, understanding the common issues can save both time and money.<\/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;Grey Motor<\/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 : \"Grey Motor\",\nfu_ebay_query : \"Holden Grey Motor\",\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\">Understanding the Holden Grey Motor<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The Grey Motor was available in several capacities during its lifespan:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>132.5 cubic inch (2.17 litre)<\/li>\n\n\n\n<li>138 cubic inch (2.26 litre)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Key features included:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cast iron block<\/li>\n\n\n\n<li>Cast iron cylinder head<\/li>\n\n\n\n<li>Overhead valve design<\/li>\n\n\n\n<li>Mechanical fuel pump<\/li>\n\n\n\n<li>Single-barrel carburettor<\/li>\n\n\n\n<li>Six-volt electrical system (early models)<\/li>\n\n\n\n<li>Three-bearing crankshaft<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">While incredibly durable for its era, the Grey Motor was designed in the 1940s and naturally lacks many of the engineering improvements found in later Holden engines.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Excessive Oil Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">One of the most common Grey Motor complaints is oil leakage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Many owners joke that a Grey Motor isn&#8217;t leaking oil\u2014it&#8217;s simply marking its territory.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Leak Points<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Side plate gaskets<\/li>\n\n\n\n<li>Rocker cover gasket<\/li>\n\n\n\n<li>Rear main seal<\/li>\n\n\n\n<li>Timing cover gasket<\/li>\n\n\n\n<li>Sump gasket<\/li>\n\n\n\n<li>Fuel pump mounting gasket<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Symptoms<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil spots on garage floor<\/li>\n\n\n\n<li>Oil accumulation around engine block<\/li>\n\n\n\n<li>Burning oil smell<\/li>\n\n\n\n<li>Constant need for top-ups<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In many cases, modern gasket materials significantly outperform the original cork gaskets used by Holden.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Gasket Repair Solution<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Permatex Ultra Black Gasket Maker<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Why enthusiasts use it:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil resistant<\/li>\n\n\n\n<li>High flexibility<\/li>\n\n\n\n<li>Excellent sealing properties<\/li>\n\n\n\n<li>Suitable for rocker covers and timing covers<\/li>\n\n\n\n<li>Helps reduce persistent leaks<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many Grey Motor owners use Ultra Black during rebuilds to improve sealing performance over original factory specifications.<\/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;Permatex Ultra Black <\/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 : \"Permatex Ultra Black \",\nfu_ebay_query : \"Permatex Ultra Black \",\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\">Low Oil Pressure<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Low oil pressure is one of the most serious Grey Motor issues.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As engines age, internal clearances increase and oil pressure can begin to drop significantly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Causes<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Worn bearings<\/li>\n\n\n\n<li>Worn oil pump<\/li>\n\n\n\n<li>Excessive crankshaft wear<\/li>\n\n\n\n<li>Blocked oil galleries<\/li>\n\n\n\n<li>Incorrect oil viscosity<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Symptoms<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flickering oil warning light<\/li>\n\n\n\n<li>Engine knocking<\/li>\n\n\n\n<li>Increased valvetrain noise<\/li>\n\n\n\n<li>Poor hot idle pressure<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Low oil pressure should never be ignored, as it can rapidly accelerate engine wear.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Overheating Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Cooling issues are extremely common in unrestored Grey Motor vehicles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Many original cooling systems have suffered decades of neglect, corrosion and sediment build-up.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Causes<\/h2>\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>Failing water pumps<\/li>\n\n\n\n<li>Stuck thermostats<\/li>\n\n\n\n<li>Collapsed radiator hoses<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Symptoms<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rising temperature gauge<\/li>\n\n\n\n<li>Coolant overflow<\/li>\n\n\n\n<li>Steam from radiator<\/li>\n\n\n\n<li>Poor performance in traffic<\/li>\n\n\n\n<li>Coolant loss<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The narrow cooling passages inside Grey Motors are particularly vulnerable to sediment build-up.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Cooling System 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\">Benefits include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Removes rust deposits<\/li>\n\n\n\n<li>Cleans cooling passages<\/li>\n\n\n\n<li>Helps restore coolant flow<\/li>\n\n\n\n<li>Suitable for classic engines<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Regular flushing can dramatically improve cooling system efficiency.<\/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;Nulon<\/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 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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 : \"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 : 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\">Cracked Cylinder Heads<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Unfortunately, cracked heads are a known Grey Motor issue.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Years of overheating and thermal cycling can eventually lead to cracking.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Crack Locations<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Between valves<\/li>\n\n\n\n<li>Around combustion chambers<\/li>\n\n\n\n<li>Water jacket areas<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Symptoms<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Unexplained coolant loss<\/li>\n\n\n\n<li>White exhaust smoke<\/li>\n\n\n\n<li>Milky engine oil<\/li>\n\n\n\n<li>Poor compression<\/li>\n\n\n\n<li>Hard starting<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Cylinder head pressure testing is highly recommended during rebuilds.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Carburettor Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The original Stromberg carburettors are simple and effective but often suffer from wear.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Issues<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Worn throttle shafts<\/li>\n\n\n\n<li>Blocked jets<\/li>\n\n\n\n<li>Float problems<\/li>\n\n\n\n<li>Fuel leaks<\/li>\n\n\n\n<li>Poor idle quality<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Symptoms<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hard starting<\/li>\n\n\n\n<li>Rough idle<\/li>\n\n\n\n<li>Excessive fuel consumption<\/li>\n\n\n\n<li>Flat spots during acceleration<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Fortunately, rebuild kits remain widely available.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Carburettor Rebuild Kit<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Stromberg Carburettor Rebuild Kit<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Why it&#8217;s worthwhile:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Restores fuel delivery<\/li>\n\n\n\n<li>Improves starting<\/li>\n\n\n\n<li>Corrects idle quality<\/li>\n\n\n\n<li>Reduces fuel leaks<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A properly rebuilt Stromberg can dramatically improve drivability.<\/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;Stromberg<\/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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Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_4 = jQuery(\"#fu_ebay_4\");\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 : \"Hotspark ignition kits \",\nfu_ebay_query : \"Hotspark ignition kits \",\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 : 4,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_4.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\">Fuel Pump Failures<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Mechanical fuel pumps generally provide decades of service, but age eventually catches up.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Symptoms<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fuel starvation<\/li>\n\n\n\n<li>Hard starting<\/li>\n\n\n\n<li>Poor high-speed performance<\/li>\n\n\n\n<li>Fuel leaks<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Old diaphragms can crack or deteriorate, especially if exposed to modern ethanol-blended fuels.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Replacement Fuel Pump<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Mechanical Fuel Pump Replacement Assembly<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Benefits:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Direct fitment<\/li>\n\n\n\n<li>Restores fuel pressure<\/li>\n\n\n\n<li>Improves reliability<\/li>\n\n\n\n<li>Suitable for stock restorations<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Replacing an ageing pump is often inexpensive insurance against roadside breakdowns.<\/p>\n\n\n<div id=\"fu_ebay_5\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 5 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_5\"><\/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;Grey Motor fuel pump<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_5 = null;\nvar waitForDepends_fu_ebay_5 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_5);\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_5 = jQuery(\"#fu_ebay_5\");\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 : \"Grey Motor fuel pump\",\nfu_ebay_query : \"Grey Motor fuel pump\",\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 : 5,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_5.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\">Valve Train Noise<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Grey Motors are known for a characteristic valvetrain sound, but excessive noise can indicate wear.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Causes<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Incorrect valve clearances<\/li>\n\n\n\n<li>Worn rocker gear<\/li>\n\n\n\n<li>Camshaft wear<\/li>\n\n\n\n<li>Pushrod wear<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Symptoms<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Excessive ticking<\/li>\n\n\n\n<li>Reduced performance<\/li>\n\n\n\n<li>Rough idle<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Regular valve adjustments remain a key maintenance item.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Workshop Manual<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Proper maintenance starts with accurate specifications.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Holden FE-FC-FB-EK Workshop Manual<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Why it&#8217;s essential:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Valve clearance specifications<\/li>\n\n\n\n<li>Ignition timing settings<\/li>\n\n\n\n<li>Torque specifications<\/li>\n\n\n\n<li>Service procedures<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Every Grey Motor owner should have a workshop manual in the garage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Preventative Maintenance Tips<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The best way to keep a Grey Motor healthy is consistent maintenance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Key recommendations<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Change oil regularly<\/li>\n\n\n\n<li>Adjust valves as required<\/li>\n\n\n\n<li>Service ignition components<\/li>\n\n\n\n<li>Flush cooling system periodically<\/li>\n\n\n\n<li>Use quality coolant<\/li>\n\n\n\n<li>Check fuel system regularly<\/li>\n\n\n\n<li>Monitor oil pressure<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These engines respond extremely well to preventative care.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Is the Grey Motor Reliable?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Absolutely.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Despite being more than six decades old, a properly rebuilt and maintained Grey Motor remains a remarkably dependable engine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Its simplicity is one of its greatest strengths.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There are no computers, sensors, injectors or electronic control modules. Most problems can be diagnosed with basic tools and repaired at home.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Holden Grey Motor is far more than just an engine. It&#8217;s a mechanical symbol of Australia&#8217;s post-war motoring boom and a key part of Holden&#8217;s heritage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While age-related issues such as oil leaks, cooling problems, ignition wear and carburettor faults are common, none are insurmountable. In fact, many can be prevented through regular maintenance and sensible upgrades.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For enthusiasts restoring an FJ, FE, FC, FB, EK, EJ or EH Holden, understanding these common Grey Motor issues is essential. Address them early, use quality parts, and your Grey Motor can continue delivering reliable service for many years 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\/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 Oil for a Holden Grey Motor<\/li>\n\n\n\n<li>Best Cooling System Upgrades for Early Holdens<\/li>\n\n\n\n<li>Holden Grey Motor Performance Upgrades Explained<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Holden Grey Motor is one of the most iconic engines in Australian motoring history. Introduced in the original 48-215 Holden in 1948 and remaining in production until the arrival of the Red Motor in 1963, the humble Grey Motor powered everything from family sedans and panel vans through to taxis, race cars and speedway [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":574,"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-7195","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>Holden Grey Motor Issues Explained - Australian Holden<\/title>\n<meta name=\"description\" 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