In the gen 1 and gen 2 3.5l ecoboost engines, these. A professional diagnosis can uncover the true. Ford calls them cam phasers
How To Remove/Replace/Inspect/Install A Camshaft Phaser Sprocket On A
The problem is that the lock pin that should engage at shutdown to hold the phaser in the stopped position doesn't such that when you start it up, it rattles.
To correct the condition, follow the service procedure to replace the vct units.
Here is a short video i found that sounds exactly like what i hear when i let off the gas pedal, only when engine is still cold My question is how can you tell if this is the cam phasers or vct. This may be due to a worn variable camshaft timing (vct) unit To correct the condition, follow the service procedure steps to replace the vct units and update the powertrain control module (pcm) calibration.
This guide provides a detailed, expert walkthrough of the ford 3.5. Took my ‘20 st (right under 22k miles) in for some maintenance work and had then check a rattling noise that i hear at cold start up Hours later, cam phasers need to be replaced, a complete. Welp the cold start death rattle came knockin… off she goes to get diagnosed, most likely cam phasers
Here’s to hoping i did everything right for endurance to keep their word.
The infamous cold start rattle is the sound of your timing components struggling to find their footing before oil pressure takes over Without the pin locked, the internal vanes of the phaser slap back and. Hear a hard rattle from the front of the engine Most owners call it a recall
My question is around the real meaning of that rattle. The cam phaser 'issue' is when the keeper pin wears out The phaser is no longer locked into that default position and the lobes inside the cam sprocket slap against the sprocket housing (internally) causing. Assuming a startup rattle is due to failing cam phasers can lead to expensive, unnecessary repairs
