{"id":7419,"date":"2026-06-10T05:40:45","date_gmt":"2026-06-10T05:40:45","guid":{"rendered":"http:\/\/australianholden.com\/?p=7419"},"modified":"2026-06-21T04:33:33","modified_gmt":"2026-06-21T04:33:33","slug":"vk-commodore-oil-leak-guide","status":"publish","type":"post","link":"https:\/\/australianholden.com\/index.php\/2026\/06\/10\/vk-commodore-oil-leak-guide\/","title":{"rendered":"VK Commodore Oil Leak Guide"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Oil leaks are one of the most common issues found in VK Commodores. Due to age, heat cycles, and hardened seals, almost every surviving VK Commodore will develop some form of oil leakage over time. While many leaks are minor and manageable, others can lead to low oil levels, engine damage, and ongoing maintenance headaches if ignored.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The VK Commodore (1984\u20131986), most commonly fitted with the Holden 202 inline-six or V8 options, uses a traditional gasket and seal design that is now well past its expected service life.<\/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;VK Commodore<\/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 : \"VK Commodore\",\nfu_ebay_query : \"VK Commodore Engine\",\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 VK Commodores Leak Oil<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Oil leaks occur mainly due to ageing materials and engine wear.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Main Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hardened rubber seals<\/li>\n\n\n\n<li>Shrinking cork gaskets<\/li>\n\n\n\n<li>High engine crankcase pressure<\/li>\n\n\n\n<li>Poor maintenance history<\/li>\n\n\n\n<li>Overheating damage<\/li>\n\n\n\n<li>Engine vibration over time<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Even well-maintained engines can develop leaks simply due to age.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">1. Rocker Cover Gasket Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">One of the most frequent leak points on VK Commodores.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil around top of engine<\/li>\n\n\n\n<li>Burning oil smell<\/li>\n\n\n\n<li>Oil dripping down engine block<\/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>Loose or uneven bolt tension<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Repair<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Replace rocker cover gasket<\/li>\n\n\n\n<li>Clean mating surfaces<\/li>\n\n\n\n<li>Ensure correct torque settings<\/li>\n<\/ul>\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;Gasket<\/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 : \"Gasket\",\nfu_ebay_query : \"VK Commodore 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 : 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\">2. Sump (Oil Pan) Gasket Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The sump gasket is another major leak source.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil dripping from bottom of engine<\/li>\n\n\n\n<li>Wet oil pan edges<\/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>Cork gasket deterioration<\/li>\n\n\n\n<li>Loose sump bolts<\/li>\n\n\n\n<li>Warped oil pan surface<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Repair<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Replace gasket with quality aftermarket seal<\/li>\n\n\n\n<li>Check sump flatness during installation<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">3. Rear Main Seal Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A serious but common VK oil leak 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 gearbox<\/li>\n\n\n\n<li>Persistent oil loss<\/li>\n\n\n\n<li>Oil dripping from bellhousing 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>Seal hardening over time<\/li>\n\n\n\n<li>Engine wear increasing crankshaft movement<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Repair<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Requires gearbox removal<\/li>\n\n\n\n<li>Replace rear main seal<\/li>\n\n\n\n<li>Inspect crankshaft surface condition<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">4. Timing Cover Oil Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Front engine leaks often originate here.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil at front of engine<\/li>\n\n\n\n<li>Oil dripping near harmonic balancer<\/li>\n\n\n\n<li>Dirty front engine 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>Deteriorated timing cover gasket<\/li>\n\n\n\n<li>Seal wear around crank pulley<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Repair<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Replace timing cover gasket and seals<\/li>\n\n\n\n<li>Inspect crank seal during repair<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">5. Side Plate Leaks (Holden 202 Engines)<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A known issue in Holden inline-six 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 along engine side<\/li>\n\n\n\n<li>Slow persistent leaks<\/li>\n\n\n\n<li>Dirt buildup on engine block<\/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>Side plate gasket shrinkage<\/li>\n\n\n\n<li>Poor sealing surface condition<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Repair<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Replace side plate gasket<\/li>\n\n\n\n<li>Clean sealing surface thoroughly<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">6. Oil Pressure Switch Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A small but common leak source.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil near oil pressure sensor<\/li>\n\n\n\n<li>Light seepage rather than heavy leak<\/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 seal failure<\/li>\n\n\n\n<li>Cracked switch housing<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Repair<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Replace oil pressure switch<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">7. Valve Stem Seal Wear (Oil Burning vs Leaks)<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Not all oil loss is external.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Blue smoke from exhaust<\/li>\n\n\n\n<li>Oil consumption without visible 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>Hardened valve stem seals<\/li>\n\n\n\n<li>Worn valve guides<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Repair<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Replace valve stem seals (top-end rebuild may be required)<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">How to Identify Oil Leaks Properly<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Before repairing, locate the exact source.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Inspection Steps<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Clean engine thoroughly<\/li>\n\n\n\n<li>Run engine and inspect for fresh oil<\/li>\n\n\n\n<li>Use UV dye if necessary<\/li>\n\n\n\n<li>Check from top and bottom of engine<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Old engines often leak from multiple points at once.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">VK Commodore Oil Leak Severity Levels<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Minor Leaks<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Light seepage<\/li>\n\n\n\n<li>No oil loss between services<\/li>\n\n\n\n<li>Cosmetic issue only<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Moderate Leaks<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Noticeable oil spots<\/li>\n\n\n\n<li>Regular top-ups required<\/li>\n\n\n\n<li>Needs gasket replacement<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Severe Leaks<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil dripping heavily<\/li>\n\n\n\n<li>Low oil pressure risk<\/li>\n\n\n\n<li>Immediate repair required<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Best Oils to Reduce Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Using correct oil can help minimise leakage.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Oil Type<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>20W-50 mineral oil (most VK engines)<\/li>\n\n\n\n<li>High zinc (ZDDP) content oils for protection<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Why It Helps<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Thicker oil reduces seepage<\/li>\n\n\n\n<li>Better seal compatibility<\/li>\n\n\n\n<li>Improved pressure stability in worn engines<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Common Mistakes When Fixing Oil Leaks<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">1. Only Replacing One Gasket<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">VK engines often leak from multiple areas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Using Cheap Gasket Kits<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Low-quality gaskets fail quickly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Ignoring Crankcase Pressure<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Blocked breathers increase leakage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Not Cleaning Engine Before Diagnosis<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Makes it impossible to identify true leak sources.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Preventing Future Oil Leaks<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Regular Oil Changes<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Prevents sludge and seal damage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Maintain Breather System<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Reduces internal pressure buildup.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Avoid Overheating<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Heat accelerates seal deterioration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Oil leaks in VK Commodores are extremely common due to age rather than design flaws. Most engines will develop multiple small leaks over time, especially around the rocker cover, sump, timing cover and rear main seal.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While these leaks are often manageable, ignoring them can lead to low oil levels and potential engine damage. The best approach is systematic repair\u2014identifying each leak source and addressing it properly rather than relying on temporary fixes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With correct maintenance and quality gasket replacement, VK Commodores can remain reliable classic Holdens despite their age.<\/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\/14\/vk-commodore-202-engine-problems\/\" type=\"post\" id=\"7395\">VK Commodore 202 Engine Problems<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/14\/vk-commodore-transmission-problems\/\" type=\"post\" id=\"7403\">VK Commodore Transmission Problems<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/14\/vk-vl-commodore-cooling-system-problems\/\" type=\"post\" id=\"7397\">VK Commodore Cooling System Problems<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/14\/vk-vl-commodore-electrical-problems\/\" type=\"post\" id=\"7411\">VK Commodore Electrical Problems<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/14\/how-to-inspect-a-vk-vl-commodore-before-buying\/\" type=\"post\" id=\"7393\">How to Inspect a VK or VL Commodore Before Buying<\/a><\/li>\n\n\n\n<li>Best Engine Oils for Holden Blue Motors<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Oil leaks are one of the most common issues found in VK Commodores. Due to age, heat cycles, and hardened seals, almost every surviving VK Commodore will develop some form of oil leakage over time. While many leaks are minor and manageable, others can lead to low oil levels, engine damage, and ongoing maintenance headaches [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3466,"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-7419","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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