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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Engine rattle/noise at start up
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<blockquote data-quote="smurfslayer" data-source="post: 1376617" data-attributes="member: 21926"><p>Is the loss of power down low? I had this on my old Mustang Cobra, went through the “not throwing any codes” drama, and finally convinced a mech that it was not normal, regardless of codes and got the ok for a tear down. it was was a dead timing chain tensioner. This sounds like 2 separate issues. </p><p></p><p>if you’ve already had phasers replaced, do we know if there’s a mechanism to actually test the phasers that are currently in the motor? They’re oil pressure actuated, right? If you’re getting the rattle, only at start up and the phasers are functional, and are getting pressurized and actuated by the solenoids, you’ve got an oil flow/pressure problem. What else is left as a variable in this system?</p></blockquote><p></p>
[QUOTE="smurfslayer, post: 1376617, member: 21926"] Is the loss of power down low? I had this on my old Mustang Cobra, went through the “not throwing any codes” drama, and finally convinced a mech that it was not normal, regardless of codes and got the ok for a tear down. it was was a dead timing chain tensioner. This sounds like 2 separate issues. if you’ve already had phasers replaced, do we know if there’s a mechanism to actually test the phasers that are currently in the motor? They’re oil pressure actuated, right? If you’re getting the rattle, only at start up and the phasers are functional, and are getting pressurized and actuated by the solenoids, you’ve got an oil flow/pressure problem. What else is left as a variable in this system? [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Engine rattle/noise at start up
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