{"id":85060,"date":"2022-04-29T08:40:45","date_gmt":"2022-04-29T15:40:45","guid":{"rendered":"https:\/\/www.racingjunk.com\/news\/?p=85060"},"modified":"2022-04-29T11:32:55","modified_gmt":"2022-04-29T18:32:55","slug":"is-oil-missing-in-action-part-1","status":"publish","type":"post","link":"https:\/\/www.racingjunk.com\/news\/is-oil-missing-in-action-part-1\/","title":{"rendered":"Is Oil Missing in Action? Part 1"},"content":{"rendered":"<p class=\"jetpack-slideshow-noscript robots-nocontent\">This slideshow requires JavaScript.<\/p><div id=\"gallery-85060-1-slideshow\" class=\"jetpack-slideshow-window jetpack-slideshow jetpack-slideshow-black\" data-trans=\"fade\" data-autostart=\"1\" data-gallery=\"[{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/Oil-1-min-1.jpg&quot;,&quot;id&quot;:&quot;85069&quot;,&quot;title&quot;:&quot;Where Did the Oil Go?&quot;,&quot;alt&quot;:&quot;Where Did the Oil Go?&quot;,&quot;caption&quot;:&quot;Click Here to Begin Slideshow \\nIt\\u2019s something we\\u2019re asked on a regular basis:  \\u201cWhere\\u2019d the oil go?\\u201d  It\\u2019s routine for most to check oil levels on a weekly or even monthly basis.  But one of those checking days, you quickly notice the oil level is down.  No big deal, you think.  But it seems like every week it just seems to be getting worse.  What\\u2019s up with that?  The truth is, oil that\\u2019s missing in action spells trouble and it can usually be attributed to three things: Leaks, blow-by or oil consumption (burning oil).  The easiest to fix (but perhaps not the easiest to troubleshoot) are leaks.  We\\u2019ll begin there:\\n\\n#1:  Leaks\\n\\n\\u201cMissing\\u201d oil can often be the result of good old-fashioned leaks out of a tear in a gasket or at any point where two components of the engine are joined (a good example and common culprit is the valve cover gasket on the cylinder head). Other locations where oil leaks can be expected tend to be around oil seals and around moving parts that exit the internals of the engine. These can include the crankshaft seals around the nose and back ends of the crank (typically where the crankshaft protrudes from the timing chain cover and the rear main seal between the cylinder block and the crankshaft flange (the flange is where the flywheel or flex plate attaches to the crankshaft).   \\n\\nAn even more common location for oil leaks is the area around the oil filter and around the edges of the oil pan and the pan drain plug.  Keep in mind that a small amount of oil loss will occur at these points when the oil is changed, but if you climb under your car and see evidence of large amounts of oil on the underside of the engine or near the transmission tunnel, you know there\\u2019s a major leak somewhere.\\n\\nWhen searching for leaks, remember that fresh oil dripping from the inside of the engine will certainly prove cleaner than oil that has been outside the engine for a long period of time (remember that oil is a magnet for dirt).  If the oil loss proves considerable and has coated a large area of the engine, it may be necessary to pressure wash the engine and engine compartment before attempting to track down the leak.  In many instances, once you find the leak, it\\u2019s often just a case of tightening the component that is leaking.  Case-in-point are the valve covers.  They use relatively small fasteners and they can vibrate loose.  If you find that the gasket is the culprit, then it has to be replaced (they\\u2019ll leak even if the fasteners are tight).  Main seals are another matter too. They often require considerable engine disassembly to enable replacement, and that\\u2019s beyond our scope for this article.\\n\\n#2: Blow By\\n\\n\\nOne cause of leaks few ever consider is blow by.  Blow by is usually created when piston rings become so worn they allow pressure from the combustion process to pressurize the oil pan area. The combustion process \\u201cblow by\\u201d is sufficiently strong to force oil out around the pan gasket and even past oil main seals in severe situations.\\n\\nBut there is another cause of blow by.  It can occur when the crankcase ventilating system is plugged up and cannot relieve internal pressures. Modern cars and light trucks are equipped with a positive crankcase ventilation system (PCV).  This is a simple arrangement of hoses coupled to a check valve that directs crankcase vapor and pressures back into the intake manifold.  This allows the vapors to be burned again within the engine.   Many older cars (typically, pre-1968) were not equipped with a PCV system; they merely exhausted crankcase vapors into the atmosphere by way of a draft tube setup.  The draft tube arrangement was revised to meet emission (smog) requirements.  \\n\\nThe check valve found within most PCV systems is a basic one-way valve used to prevent the reverse flow of air (and oil) through the system.  The valve is designed to be serviced, and over time, it can become plugged with sludge and dirt.  If it becomes plugged, it is impossible for the system to relieve crankcase pressure.  The result is oil leakage (much like those caused by blow by).  \\n\\nIn order to test the operation of the PCV system, track down the hose leading from the valve cover to the base of the carburetor or fuel injection intake manifold. At some point in this line you will find the PCV valve. Fire up the engine and allow it to reach normal operating temperature.  Using a set of smooth jaw pliers, pinch the rubber PCV line closed. If the PCV system is functioning properly, the engines idle speed will drop almost 100 RPM (that\\u2019s an audible drop).  If the car doesn\\u2019t experience an RPM there\\u2019s a good chance the PCV valve is plugged.\\n\\nOver the years, a few PCV valves could be disassembled and cleaned, but for the most part the valves are throw away items.  For older cars, the PCV valve should be replaced at each tune up. Modern cars have different service intervals. Your owner\\u2019s manual should provide information on when (usually mileage based) the PCV is serviced.  \\n\\nThere\\u2019s one more external culprit (and it\\u2019s rather rare):  On select cars equipped with a vacuum booster pump, excessive oil consumption can occur if the internal diaphragm is torn or ruptured.  If the diaphragm is damaged, the vacuum pump can suck oil vapor from the crankcase and direct it to the intake manifold. If that occurs, it will appear as if the car has worn piston rings.  \\n\\n#3: Worn Engine Components\\n\\n\\nIf the engine is burning oil, it simply means that oil is internally allowed to enter the combustion chamber. A major sign of an engine burning oil is a smoky blue exhaust. It\\u2019s most prevalent once the engine has been idling for a few minutes and is then accelerated. Another telltale symptom of burning oil is fouled spark plugs.  Here the spark plugs will be coated in a black, gummy (wet) substance. Now, if you scroll back up the page, keep in mind that the PCV system (and to a lesser degree, a car fitted with a vacuum booster pump) can show similar symptoms. The key though is the volume:  An engine with worn internals will have more pronounced symptoms than a faulty PCV. \\n\\nThere are two principal locations where oil can enter the combustion chamber \\u0026#8211;the valve guides and the piston rings.  There often seals on the valve guides to prevent oil from entering the combustion chamber.  Those seals along with piston rings wear over time and they begin to allow oil into the combustion chamber.  Once oil is in the combustion chamber, it burns.  Valve stem seals are easy enough for a mechanic to replace, however if the oil consumption becomes serve, it\\u2019s likely time for the engine to be rebuilt.  \\n\\nBelieve it or not, one of the most common locations for an oil leak is the valve cover gasket. Often, these components (valve covers) are held in place by small fasteners.  They can, over time loosen.  You\\u2019d be surprised just how much oil can leak from a faulty gasket. It\\u2019s an easy fix (tightening fasteners or requiring a new gasket).\\n\\nCheck out the following photos for more oil leak advice.\\n\\nClick Here to Begin Slideshow&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/oil-2-min-1.jpg&quot;,&quot;id&quot;:&quot;85070&quot;,&quot;title&quot;:&quot;Where Did the Oil Go? Slide 2&quot;,&quot;alt&quot;:&quot;Where Did the Oil Go?&quot;,&quot;caption&quot;:&quot;Another obvious location for an oil leak is the oil filter.  The most common dilemma here is a doubled-up o-ring where the old example wasn\\u2019t removed and a new one; complete with the oil filter was tightened in place.  Occasionally, an attendant will over or under tighten an oil filter and that too can create leaks. Ditto with poor quality filters.&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/oil-3-min-1.jpg&quot;,&quot;id&quot;:&quot;85071&quot;,&quot;title&quot;:&quot;Where Did the Oil Go? Slide 3&quot;,&quot;alt&quot;:&quot;Where Did the Oil Go?&quot;,&quot;caption&quot;:&quot;Two other common locations for oil leaks include the main seals \\u2013 one on the timing cover and the other at the crankshaft flange. If you locate a leak at either of these two locations, it usually means the engine will have to be removed and\\\/or partially disassembled for seal replacement.  Obviously, it\\u2019s not an easy repair. \\n\\nSee the next slide for further illustration.&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/oil-4-min-1.jpg&quot;,&quot;id&quot;:&quot;85072&quot;,&quot;title&quot;:&quot;Where Did the Oil Go? Slide 4&quot;,&quot;alt&quot;:&quot;Where Did the Oil Go?&quot;,&quot;caption&quot;:&quot;&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/oil-5-min-1.jpg&quot;,&quot;id&quot;:&quot;85073&quot;,&quot;title&quot;:&quot;Where Did the Oil Go? Slide 5&quot;,&quot;alt&quot;:&quot;Where Did the Oil Go?&quot;,&quot;caption&quot;:&quot;Internally, faulty valve stem seals can cause an engine to burn oil.  These seals prevent oil from getting past the valves into the combustion chamber.  If they\\u2019re cracked, broken or missing, then the engine will exhibit many characteristics of a power plant needing a major overhaul.  Fortunately, valve stem seal replacement can often be accomplished with the engine in the car.&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/oil-6-min-1.jpg&quot;,&quot;id&quot;:&quot;85074&quot;,&quot;title&quot;:&quot;Where Did the Oil Go? Slide 6&quot;,&quot;alt&quot;:&quot;Where Did the Oil Go?&quot;,&quot;caption&quot;:&quot;One spot folks tend to miss when diagnosing excessive oil consumption is the simple PCV system. If the valve is plugged, there\\u2019s a good chance internal engine pressures can force oil out of the engine (through perfectly good seals and gaskets).  The text offers more insight into crankcase venting issues.&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/oil-7-min-1.jpg&quot;,&quot;id&quot;:&quot;85075&quot;,&quot;title&quot;:&quot;Where Did the Oil Go? Slide 7&quot;,&quot;alt&quot;:&quot;Where Did the Oil Go?&quot;,&quot;caption&quot;:&quot;Spark plugs are your window to the inside of the engine. As pointed out in the text, a major sign of an engine burning oil is a smoky blue exhaust. Another telltale symptom of burning oil is fouled spark plugs.  Here the spark plugs will be coated in a black, gummy (wet) substance.  It\\u2019s easy to spot on used plugs (this spark plug is actually normal).&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/oil-8-min-1.jpg&quot;,&quot;id&quot;:&quot;85076&quot;,&quot;title&quot;:&quot;Where Did the Oil Go? Slide 8&quot;,&quot;alt&quot;:&quot;Where Did the Oil Go?&quot;,&quot;caption&quot;:&quot;If the engine is burning serious amounts of oil and fails the spark plug test (along with the other troubleshooting tips), there\\u2019s a good chance it will need an overhaul.  That almost always means replacing the piston rings.  It\\u2019s not an easy fix and you expect major costs if that is the case.&quot;,&quot;itemprop&quot;:&quot;image&quot;}]\" itemscope itemtype=\"https:\/\/schema.org\/ImageGallery\"><\/div>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>It\u2019s something we\u2019re asked on a regular basis:  \u201cWhere\u2019d the oil go?\u201d  It\u2019s routine for most to check oil levels on a weekly or even monthly basis.  But one of those checking days, you quickly notice the oil level is down. What then?<\/p>\n<\/div>","protected":false},"author":20,"featured_media":85069,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"gallery","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5028,5008,11,3470,4879],"tags":[4660,9021,9022,321],"class_list":["post-85060","post","type-post","status-publish","format-gallery","has-post-thumbnail","hentry","category-fuel-delivery","category-engine","category-how-tos","category-news","category-slideshow","tag-oil","tag-oil-leaks","tag-oil-tips","tag-wayne-scraba","post_format-post-format-gallery"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2022\/04\/Oil-1-min-1.jpg","jetpack_shortlink":"https:\/\/wp.me\/p42YSK-m7W","jetpack_sharing_enabled":true,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/85060","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/comments?post=85060"}],"version-history":[{"count":2,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/85060\/revisions"}],"predecessor-version":[{"id":85079,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/85060\/revisions\/85079"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/media\/85069"}],"wp:attachment":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/media?parent=85060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/categories?post=85060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/tags?post=85060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}