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2011-2014 Mustangs
2011-2014 Mustang Talk
2012 Coyote - Spun Rod Bearing
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<blockquote data-quote="Shaun@AED" data-source="post: 15426679" data-attributes="member: 32381"><p>I've seen it before, factory stock engines and others. When oil level is lower than ~6qts it's quite common.</p><p></p><p>The Coyote, like any other modular, is extremely dependent on oil control. In general the Modular line of Ford engines is OK with oil control, but not the best. There is a significant amount of oil that gets wrapped up in the air around the crankshaft at high RPM.</p><p></p><p>The engine itself has roughly 2qts of oil lubricating it at all times. Another 1/4-1/2 in the filter and oil cooler (if equipped).</p><p>These engines hold 8qts total, so we should have 5.5-6qts of oil in the sump at all times during normal driving conditions, and we do until the crank windage at high RPM holds the oil in suspension. Ford modulars push the oil/air mix forward thru the holes in the main webbing of the block into the front timing cover where lower windage allows the oil/air to separate and drain back into the sump. It's not a bad way to do it, but you do need to realize there is at least 3qts of oil wrapped around the crankshaft mixed with the air (windage) at higher RPM's.</p><p>That's 2.5qts of oil in the engine and 3qts stuck in suspension at high RPM, which leaves 2.5 in the sump for the oil pump to pick up. Running these engines 2 qts low on oil will take out bearings quickly. And due to the high amount of windage and the placement of the PCV without any baffles under the valve cover, we all know how much oil the engine can suck into the manifold under heavy compression braking after a high RPM blast.</p><p></p><p>Another contributing factor is the air/oil mix takes time to separate, the oil in the sump at high RPM has a lot of air in it, reducing the lubricity of the oil getting pumped thru the engine.</p><p></p><p>For more detailed explanation see here: (start with post 95)</p><p><a href="http://www.modularfords.com/threads/126692-Coyote-4-valve-5-0/page7" target="_blank">http://www.modularfords.com/threads/126692-Coyote-4-valve-5-0/page7</a></p></blockquote><p></p>
[QUOTE="Shaun@AED, post: 15426679, member: 32381"] I've seen it before, factory stock engines and others. When oil level is lower than ~6qts it's quite common. The Coyote, like any other modular, is extremely dependent on oil control. In general the Modular line of Ford engines is OK with oil control, but not the best. There is a significant amount of oil that gets wrapped up in the air around the crankshaft at high RPM. The engine itself has roughly 2qts of oil lubricating it at all times. Another 1/4-1/2 in the filter and oil cooler (if equipped). These engines hold 8qts total, so we should have 5.5-6qts of oil in the sump at all times during normal driving conditions, and we do until the crank windage at high RPM holds the oil in suspension. Ford modulars push the oil/air mix forward thru the holes in the main webbing of the block into the front timing cover where lower windage allows the oil/air to separate and drain back into the sump. It's not a bad way to do it, but you do need to realize there is at least 3qts of oil wrapped around the crankshaft mixed with the air (windage) at higher RPM's. That's 2.5qts of oil in the engine and 3qts stuck in suspension at high RPM, which leaves 2.5 in the sump for the oil pump to pick up. Running these engines 2 qts low on oil will take out bearings quickly. And due to the high amount of windage and the placement of the PCV without any baffles under the valve cover, we all know how much oil the engine can suck into the manifold under heavy compression braking after a high RPM blast. Another contributing factor is the air/oil mix takes time to separate, the oil in the sump at high RPM has a lot of air in it, reducing the lubricity of the oil getting pumped thru the engine. For more detailed explanation see here: (start with post 95) [url]http://www.modularfords.com/threads/126692-Coyote-4-valve-5-0/page7[/url] [/QUOTE]
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