Rattling/Crackle noise passenger header

[Basicstang]

2014 mustang 5.0 6 speed. HP Tuners. Full bolt ons. Boss 302 manifold. 47# injectors. K&N Blackhawk cold air intake. BBK catless long tubes. Straight piped to GT500 quad tip mufflers. Full E85 tune. Mishimoto radiator. Mishimoto front cross flow bar oil cooler.

I’m completely at a stand still the vehicle recently started a weird rattle noise on the passenger side I’ve got under it and checked all bolts to the header and nothing not even black smoke stains. It crackles like a metal clip in a can under slight application of the gas peddle and when accelerating. You can hear it more at low rpm like if the rpm rises you hear it around 300-500.. It’s becoming annoying but the car performs well and no loss in gains. The one thing a couple of guys told me is that I shouldn’t have used the BBK gaskets and now I just want to assure myself what it could be before I send her out because I for sure will not be pulling anything apart again as I’m too lazy and headers on these cars aren’t fun at all. so this time around I’m paying a shop to redo my headers with oem gaskets 500$ but before that I’d want to see anyones input on what the noise could be.

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[sigintel]

cracked cats?

 

[Basicstang]

cracked cats?

No cats at all brotha.

 

[sigintel]

No cats at all brotha.

 

[Basicstang]

I posted a video idk if that would help

 

[sigintel]

All the new coyotes sound like that after first oil change. lol.

What weight oil in it now?
That started after a recent oil change?

Sounds like a rod end self clearanced a tad and you have a little piston rock/skirt drag in the cylinder?
Really difficult to tell in the video.

Change the oil and put in some 10W50 or 10W40 or something heavy and see if the RPM at which it makes noise changes.

graph rpm of noise vs time from cold start and make a note of temp guage or CHT temp every minute as you go.

If the noise changes with temperature and oil pressure changing during warm up, it might be in the motor.

You can also try using a 3-5 foot piece of garden hose, old airline, pvc, or some other tubing and hold one end to your ear and work your way around the engine probing to try and find the noise source.

 

[Basicstang]

All the new coyotes sound like that after first oil change. lol.

What weight oil in it now?
That started after a recent oil change?

Sounds like a rod end self clearanced a tad and you have a little piston rock/skirt drag in the cylinder?
Really difficult to tell in the video.

Change the oil and put in some 10W50 or 10W40 or something heavy and see if the RPM at which it makes noise changes.

graph rpm of noise vs time from cold start and make a note of temp guage or CHT temp every minute as you go.

If the noise changes with temperature and oil pressure changing during warm up, it might be in the motor.

You can also try using a 3-5 foot piece of garden hose, old airline, pvc, or some other tubing and hold one end to your ear and work your way around the engine probing to try and find the noise source.

This may be my first time experiencing the dreaded type writer/bbq igniter tick…. Now that I remember clearly.. I did my long tubes and everything was torqued to spec even triple checked cause I knew I didn’t wanna go back and do it all over again. Then I had my oil cooler and new radiator sitting in the garage and I finally got around to mounting them and installing them both. It was only until that oil change that I started hearing this noise. So it’s a relief it isn’t my headers lol. But it’s annoying that this typewriter tick is present. I run 5-20 full synthetic Mobil 1 and always prefill the filter before installing I may need to crank the oil thickness up just because the oil cooler may make the 5-20 Mobil 1 viscosity thinner since it’s being cooled as it passed through the cooler.

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