650NutKase

So I was stuck in traffic yet again and the truck started to get warm. The temp needle started to rise, so I put it neutral and gave it some revs to get the fan spinning faster and the water pump flowing more water. This dropped the needle down almost instantly and it never went back up. I then noticed a noise that the truck makes intermittently, but especially when I turn the wheel. Please listen closely for a dieseling sound. I don't think it's phasers....let me know what you think. Turn the volume up. Keep in mind, my truck was recently serviced for coolant flush and 180* t stat. Let's not get into another argument over 195 vs 180. I'm positive it has nothing to do with my t stat. Anywho, what sound is this??

https://drive.google.com/file/d/0B2I...ew?usp=sharing

650NutKase

anyone?

07F150Lariat5.4

To me, it just sounds kind of like a light phaser knock. It happens when it's really hot right? Usually, that's when phaser noise is most noticeable while it may not make the noise at other times due to the oil being thinned. Does it idle smoothly while making the noise? Or does it seem to try to shake a bit?

650NutKase

idles smoothly. So then I'm good as far as phasers go right now? Assuming this only happens when the truck gets super hot

07F150Lariat5.4

As long as it runs good, you should be fine, unless the noise continues to get louder over time. A way to find out if you have a real problem is get it really hot again and then brake torque it in drive up to 1,000 RPMs for about 2 seconds and then quickly let off the accelerator. If it starts shaking and trying to knock when it returns to idle, you may have bad VCT solenoids. If it doesn't do that, I wouldn't worry about it.

650NutKase

Looking this up, I found this video...


Think it's my vct solenoids that are going out?? My truck does this exact same thing only around 800-900 rpm any time the truck is warm...

07F150Lariat5.4

Mine does that also. Has for years. While it's not really considered "normal" for it to rattle like that, as long as it doesn't affect how it is running, you don't have to replace them. When there is a problem is if it knocks once you let off the accelerator. That rattle should stop immediately after depressing the accelerator. If it doesn't and starts shaking and knocking, then that is a sign that they are sticking open and messing with the timing.

Here is an example of what it shouldn't do when you let off of the accelerator.

650NutKase

Tried brake torquing it at 1000 and accelerating once the truck was up to normal temp. No drive ability issues. I think I'm just going to leave it, since it drives fine...