{"id":7620,"date":"2026-06-08T04:54:57","date_gmt":"2026-06-08T04:54:57","guid":{"rendered":"http:\/\/australianholden.com\/?p=7620"},"modified":"2026-06-21T02:48:56","modified_gmt":"2026-06-21T02:48:56","slug":"common-ls-engine-problems","status":"publish","type":"post","link":"https:\/\/australianholden.com\/index.php\/2026\/06\/08\/common-ls-engine-problems\/","title":{"rendered":"Common LS Engine Problems"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">LS engines are some of the most popular V8 engines ever produced, widely used in Holden Commodores, HSV models, and performance applications around the world. Known for their strength, simplicity, and tuning potential, LS engines are generally very reliable\u2014but they still have a number of common issues that appear with age, high mileage, or poor maintenance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide explains the most common LS engine problems, their symptoms, causes, and how to fix or prevent them.<\/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;LS1<\/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 : \"LS1\",\nfu_ebay_query : \"LS1 Performance\",\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\">Overview of LS Engines<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">LS engines include a wide range of GM V8 variants such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LS1<\/li>\n\n\n\n<li>LS2<\/li>\n\n\n\n<li>LS3<\/li>\n\n\n\n<li>L76 \/ L77 (AFM-equipped variants)<\/li>\n\n\n\n<li>L98 (non-AFM Holden V8)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">While they share a similar architecture, specific issues can vary between models.<\/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;LSA<\/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 : \"LSA\",\nfu_ebay_query : \"LSA V8\",\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\">1. Oil Consumption Issues<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Oil usage is one of the most common LS engine complaints.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Frequent oil top-ups<\/li>\n\n\n\n<li>Blue smoke on startup or acceleration<\/li>\n\n\n\n<li>Low oil warnings<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Worn piston rings<\/li>\n\n\n\n<li>Valve stem seal wear<\/li>\n\n\n\n<li>PCV system issues<\/li>\n\n\n\n<li>High mileage engine wear<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Oil consumption tends to increase as engines age.<\/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;LS<\/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 : \"LS\",\nfu_ebay_query : \"LS Holden Piston Rings\",\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\">2. AFM (Active Fuel Management) Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Found in some later LS-based engines.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Engine ticking noise<\/li>\n\n\n\n<li>Oil consumption increase<\/li>\n\n\n\n<li>Lifter failure<\/li>\n\n\n\n<li>Rough running<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>AFM lifter collapse<\/li>\n\n\n\n<li>Oil pressure issues<\/li>\n\n\n\n<li>Long service intervals<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">AFM systems are known for lifter-related failures in high-kilometre engines.<\/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;Lifters<\/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. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_3 = jQuery(\"#fu_ebay_3\");\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 : \"Lifters\",\nfu_ebay_query : \"LS Holden lifters\",\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 : 3,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_3.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\">3. Lifter Failure<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A well-known LS engine issue, especially in AFM-equipped variants.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Loud ticking noise from engine<\/li>\n\n\n\n<li>Misfires<\/li>\n\n\n\n<li>Loss of power<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil starvation<\/li>\n\n\n\n<li>AFM lifter collapse<\/li>\n\n\n\n<li>Poor oil maintenance<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">4. Oil Pressure Sensor Failure<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A common but often overlooked issue.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>False low oil pressure warnings<\/li>\n\n\n\n<li>Oil leaks near sensor area<\/li>\n\n\n\n<li>Dashboard warning lights<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sensor failure<\/li>\n\n\n\n<li>Seal degradation<\/li>\n\n\n\n<li>Electrical faults<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">5. Valve Cover Gasket Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Very common on high-kilometre LS engines.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil smell in engine bay<\/li>\n\n\n\n<li>Oil around cylinder heads<\/li>\n\n\n\n<li>Smoke from exhaust manifold area<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hardened gasket material<\/li>\n\n\n\n<li>Heat cycling over time<\/li>\n<\/ul>\n\n\n<div id=\"fu_ebay_4\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 4 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_4\"><\/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;Gasket<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_4 = null;\nvar waitForDepends_fu_ebay_4 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_4);\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_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 : \"Gasket\",\nfu_ebay_query : \"LS Holden Gasket 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 : 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\">6. Rear Main Seal Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Another frequent LS engine issue.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil leaking between engine and transmission<\/li>\n\n\n\n<li>Oil spots under vehicle<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crankshaft seal wear<\/li>\n\n\n\n<li>High mileage<\/li>\n\n\n\n<li>Crankcase pressure buildup<\/li>\n<\/ul>\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;Rear Main Seal<\/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 : \"Rear Main Seal\",\nfu_ebay_query : \"LS Holden rear main seal\",\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\">7. Timing Chain Wear (Less Common but Possible)<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">LS engines use timing chains rather than belts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rattling noise at startup<\/li>\n\n\n\n<li>Cam timing fault codes<\/li>\n\n\n\n<li>Poor performance<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chain stretch over time<\/li>\n\n\n\n<li>Poor oil maintenance<\/li>\n\n\n\n<li>High mileage wear<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">8. Knock Sensor Failure<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">LS engines use knock sensors for ignition timing control.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduced engine power<\/li>\n\n\n\n<li>Check engine light<\/li>\n\n\n\n<li>Poor fuel economy<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sensor failure<\/li>\n\n\n\n<li>Water or oil contamination<\/li>\n\n\n\n<li>Wiring issues<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">9. Intake Manifold Gasket Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Common in older LS engines.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rough idle<\/li>\n\n\n\n<li>Lean fuel mixture codes<\/li>\n\n\n\n<li>Coolant or air leaks<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gasket deterioration<\/li>\n\n\n\n<li>Heat cycling<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">10. Oil Pump Wear<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Less common but important in high-kilometre engines.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Low oil pressure<\/li>\n\n\n\n<li>Engine noise at startup<\/li>\n\n\n\n<li>Warning lights<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Internal pump wear<\/li>\n\n\n\n<li>Oil sludge buildup<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">11. Cooling System Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Overheating can lead to serious LS engine damage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rising temperature gauge<\/li>\n\n\n\n<li>Coolant loss<\/li>\n\n\n\n<li>Overheating warnings<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Thermostat failure<\/li>\n\n\n\n<li>Radiator blockage<\/li>\n\n\n\n<li>Water pump wear<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Diagnosing LS Engine Problems<\/h1>\n\n\n\n<h1 class=\"wp-block-heading\">Step 1: Check Oil Condition<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Inspect for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Low oil level<\/li>\n\n\n\n<li>Sludge or contamination<\/li>\n\n\n\n<li>Burning smell<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Step 2: Scan for Fault Codes<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Common codes relate to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Misfires<\/li>\n\n\n\n<li>Knock sensors<\/li>\n\n\n\n<li>Fuel system issues<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Step 3: Listen for Engine Noise<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Look for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ticking (lifters)<\/li>\n\n\n\n<li>Rattling (timing chain)<\/li>\n\n\n\n<li>Knocking (serious internal issues)<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Step 4: Inspect for Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Check:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Valve covers<\/li>\n\n\n\n<li>Rear main seal<\/li>\n\n\n\n<li>Oil pressure sensor<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Common Misdiagnoses<\/h1>\n\n\n\n<h1 class=\"wp-block-heading\">Lifter Noise vs Injector Noise<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Injector ticking is often mistaken for lifter failure.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Exhaust Noise vs Engine Knock<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Exhaust leaks can sound like engine problems.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Sensor Faults vs Mechanical Issues<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Many LS issues are electronic rather than internal failure.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Preventing LS Engine Problems<\/h1>\n\n\n\n<h1 class=\"wp-block-heading\">Regular Oil Changes<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Every 5,000\u201310,000 km recommended<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Use High-Quality Oil<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Critical for lifter and AFM protection.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Maintain Cooling System<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Prevents overheating-related engine damage.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Replace PCV System Components<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Helps control crankcase pressure and reduce leaks.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Warning Signs Requiring Attention<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Persistent ticking or knocking<\/li>\n\n\n\n<li>Oil pressure warnings<\/li>\n\n\n\n<li>Excessive oil consumption<\/li>\n\n\n\n<li>Misfires under load<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These symptoms should be diagnosed early.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LS engines are strong, durable, and highly capable, but they are not completely free from issues. The most common problems include oil consumption, lifter failure (especially in AFM engines), gasket leaks, and sensor faults.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With proper maintenance\u2014especially regular oil changes and cooling system care\u2014most LS engines will deliver excellent reliability and long service life.<\/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\/08\/common-ls-engine-oil-leaks\/\" type=\"post\" id=\"7616\">Common LS Engine Oil Leaks<\/a><\/li>\n\n\n\n<li>Best Oils for LS Engines<\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/12\/ve-vf-commodore-fuel-economy-problems\/\" type=\"post\" id=\"7656\">VE Commodore Fuel Economy Problems<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>LS engines are some of the most popular V8 engines ever produced, widely used in Holden Commodores, HSV models, and performance applications around the world. Known for their strength, simplicity, and tuning potential, LS engines are generally very reliable\u2014but they still have a number of common issues that appear with age, high mileage, or poor [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":596,"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-7620","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 - 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