Cord

I was at the dealer for my 100k oil change and I asked to check the computer to see how far the timing was off. It's been one year and roughly 30,000 miles since the chain was replaced. Anyways, at 3 degrees I'm half way to qualifying for a replacement. This goes to say that you will hearing the rattle for quite some time until replacement. It's pretty obvious that Ford is going to try to procrastinate the repairs until the warranty has expired. My dealer was right; this is the worst thing that could happened. Without a 6+ degrees of stretch he can't do anything.

Tyssa'sRide

Was that measured at cold start?

huntnrig

3 degrees seems like a lot for a high performance motor. It wasn't out 3 degrees when it was delivered new. They should fix it. Period, with an apology for being such weasels about it too. Ford marketed the stink out of this motor. It is irresponsible not to stand behind it...

Cord

I don't know how it's measured. I know that when my CEL was on, it would frequently show right at startup. However, I could get it out of limp mode by cycling the ignition. This only worked for a while because all I had to do was accelerate down a ramp and the CEL would be back on. Throw the truck into neutral and cycle the ignition while still moving would take it back out of limp. I was able to do this for about a week before the truck was constantly in limp mode. I know from when I saw the computer plugged in that it shows real time data on the advance, vacuum and another 3 dozen plug parameters (including some that you would never think of), but I don't know what the data logging capabilities are. For this reason, I believe they are reading 3 degrees of incorrect timing with the engine running. That the error is even greater at start up.

papa tiger

Turning the crank counter clockwise slowly until restance is felt an then clockwise until resistance is first felt shows the free degrees of chain tensioner. Mark with paint marker.

bignfast

My truck has been making this noise sporadically since june 3rd 2013. I was at about 35,400 miles when this started and now I am at 56,000. Up until about 49,000 miles it was making this noise at least 3-4 times per week at cold start but in the past 7,000 miles I have only heard the noise 2 times and that was 6,000 miles or so ago. I find that rather odd that it would go away like that. The only thing I have changed is the oil I use but I dont think that is the cause. I have always used motorcraft filters and pennzoil ultra which is a great oil until recently at. around 49,000 miles I changed to pennzoil platinum pure plus because I have not been able to find ultra locally. I am glad the noise is gone but afraid it may return along with possible other related problems. my powertrain warranty will be gone soon so this is bothering me a bit. Anybody have any thoughts on that? I know the dealer wont do jack unless they can "reproduce the problem".

Sorry for the long post.

huntnrig

Is it possible to not drive the truck a few days and see if it makes the noise?

Others have stated parking on an incline made the symptoms worse.

You need to get this documented by your dealer if it's the timing chain or you'll be up **** creek without a paddle when the problem progresses and it eventually will.

The noise is not normal and not healthy for your engine.

papa tiger

The Motocraft 500S has a silicone ADBV which supercedes the 500. The 500 has a nitrile ADBV. A silicone anti drain back valve resists heat better and seals better then the previous design.

itguy08

Or is what they are reading the compensation to get it into correct time? Remember, these engines have variable valve timing and can do a bit to correct the valve timing. (much like fuel trims on the injectors) Where's Makaluko when you need him?

My guess is at 6 degrees, it's getting outside of the range for the computer to adjust timing.

I've replaced a few 4 banger timing belts. The first one, I the valve timing was off by a tooth. You definitely felt it's lack of power. So I'd think you'd notice 3-6+ degrees of valve timing off.

oldwrench

So this 3-6 deg off amount......is it cam shaft deg's or crankshaft deg's? Back when I was slotting motorcycle cam sprockets to degree the cams to change valve overlap, 3 deg on the crank was a lot.....3 deg on the cam would be WAY HUGE!