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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
2014 Roush Raptor startup 'tapping' sound?
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<blockquote data-quote="Snuggles" data-source="post: 1835767" data-attributes="member: 63144"><p>Glad to hear you figured it out. Cam phasers are a huge issue on the 3.5 ecoboost. I haven’t heard of it being an issue on the 6.2. </p><p></p><p>For anyone researching this in the future, here is one way to test this: </p><p></p><p>- next time you are doing a cold start, before starting the engine push the gas pedal to the floor and hold it there while also pressing the brake pedal. Hold them there. </p><p>- Attempt to start the engine while still holding the pedals down. The engine should crank but not start. Do this two times for about ten seconds each, then immediately start the engine as normal. </p><p></p><p>If there is no noise when it starts this time then you likely have a cam phaser issue. </p><p></p><p>The turning over will build oil pressure, which actuates the cam phasers early. </p><p></p><p>Since it’s not actually running, there is no heat to swell the exhaust manifolds, so a leak would still be noticeable on start. Same with a valve spring I guess, but that won’t go away as it warms up. </p><p></p><p></p><p>Also FYI. The trick above is a great way to gently get oil pumped through your engine after doing work on it prior to fully starting. I learned it when replacing the turbo on my wife’s ecoboost. A “hot” start on a dry turbo can cause problems.</p></blockquote><p></p>
[QUOTE="Snuggles, post: 1835767, member: 63144"] Glad to hear you figured it out. Cam phasers are a huge issue on the 3.5 ecoboost. I haven’t heard of it being an issue on the 6.2. For anyone researching this in the future, here is one way to test this: - next time you are doing a cold start, before starting the engine push the gas pedal to the floor and hold it there while also pressing the brake pedal. Hold them there. - Attempt to start the engine while still holding the pedals down. The engine should crank but not start. Do this two times for about ten seconds each, then immediately start the engine as normal. If there is no noise when it starts this time then you likely have a cam phaser issue. The turning over will build oil pressure, which actuates the cam phasers early. Since it’s not actually running, there is no heat to swell the exhaust manifolds, so a leak would still be noticeable on start. Same with a valve spring I guess, but that won’t go away as it warms up. Also FYI. The trick above is a great way to gently get oil pumped through your engine after doing work on it prior to fully starting. I learned it when replacing the turbo on my wife’s ecoboost. A “hot” start on a dry turbo can cause problems. [/QUOTE]
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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
2014 Roush Raptor startup 'tapping' sound?
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