papa tiger

Seems to be VCT or VCT valve to me. It's not lasting 10's of minutes is it? If the noise stays there for some length of time worry a lot/some.

Ron AKA

This is a very long thread, and I have not read all the posts. Your engine noise sounds like a similar issue in some Toyota engines with variable valve timing. See this Toyota TSB to repair the issue. Essentially they are replacing the VVT vane positioner at the end of the camshaft.

http://www.rav4world.com/tsb/2010/T-SB-0146-10.pdf

I don't recall ever seeing a clear explanation as to what the basic problem is, but my conclusion, rightly or wrongly is that there is some instability in startup due to oil flow/viscosity/seal leakage/chain looseness/or who knows what. The outcome is that the vane mechanism instead of immediately finding a stable orientation (timing) bangs back and forth for a second or so and then settles down. I am assuming the Ford valve timing positioner is similar to the Toyota one, and uses the vane device. Here is a good youtube video that explains how it works. Just imagine what that device would sound like if it was to bang back and forth in the allowed degree of rotation, instead of staying in a stationary specific position.



Or, perhaps the Ford issue is a totally different one...

millwrat

winchested

Why haven't you bought a Toyota yet? Stay outa this thread with your crap. We are getting no where. ford has said no fix yet.

vozaday

Rotflmao

vozaday

If you listen to a 5.4l, that's how worn cam phasers sound.

murdr

UPDATE UPDATE: FOUND PEICES OF PISTON SKIRT INSIDE OIL PAN FORD IS GIVING ME A NEW MOTOR.

itguy08

Glad to hear it! I wonder if that was your noise all along? When pistons and valves collide it's usually the valves that take one for the team, not the piston. And it all usually comes to a stop. The only way for the valves and piston to meet would be bad timing.

Either way - glad to hear you're getting fixed up!!!!!

huntnrig

Wow... So how long after you began to hear the noise we're reporting until this happened?

murdr

I started to hear the knocking noising at idle in august or july and I originally had start up noise probably a year ago.