2008 6.4 Noise

My 6.4 just started making a high pitched noise right at 10lbs boost, Im thinking one of my turbos is bad. Any Ideas?

Does it still build normal boost? I would check for a boost leak could be the sound of air escaping

Ya it still builds fine until the high pitched metal on metal sounding noise and I let off right away.

Nobody?? Ok what does a turbo sound like when the bearing squeals?

just a guess, but do you have a aftermarket intake? did you remove the cover or anything?

No all stock, but I will look in there thanks.

It could also be a leaking uppipe. Use a mirror and look for soot on the firewall.

I've had that happen a few times, its the start of and up pipe leak, the noise with get quieter as the hole gets larger then it just sounds like a tire with a air leak.

Thanks guys I will check that.

OK so no soot. Could it be my HPFP making noise?

Desertdweller said:

OK so no soot. Could it be my HPFP making noise?

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Where all did you look? You need to check all of the entire up pipe on both sides, around the down pipe and also between both turbos where they connect together. If it's the early stages there may be little soot and it will be hard to find, but eventually it will get bigger the sound won't be as high pitched and there will be a lot more soot. I've had to do mine a few times it's pretty common on 6.4's.

SEABEE08FX4 said:

Where all did you look? You need to check all of the entire up pipe on both sides, around the down pipe and also between both turbos where they connect together. If it's the early stages there may be little soot and it will be hard to find, but eventually it will get bigger the sound won't be as high pitched and there will be a lot more soot. I've had to do mine a few times it's pretty common on 6.4's.

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I will get a better look when they pull the cab to replace the HPFP:doh:

I went to check the codes with my live wire but all it did was flash the red light 3 or 4 times and the red light stays solid after that, is my live wire junk or can I send it in to get fixed?

Desertdweller said:

I went to check the codes with my live wire but all it did was flash the red light 3 or 4 times and the red light stays solid after that, is my live wire junk or can I send it in to get fixed?

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SC
I wont be any help there because my LW never read codes other than the LW codes. Try calling SCT on that one and see what they suggest.

They are usually cool on sending you a new unit if yours is malfunctioning badly.


Sent from my iFun 4

K thanks

OK so my livewire is fine it just had a button that was stuck. The HPFP is fine just had air in the system. Now for the high pitched noise, I found the elbow that connects the turbos together loose because of missing nuts and a broken stud- the one that goes through the valve cover and into the head, I kinda wiggled it back into place and the noise went away so I will update after I do the repair. Thanks for the help everyone.

sweet

Did you get that exhaust on? UPS billed me 295 for shipping and said it should have weighed 300 lbs due to measurements we are still going back and forth! Hope it worked for ya

powersmokin64 said:

Did you get that exhaust on? UPS billed me 295 for shipping and said it should have weighed 300 lbs due to measurements we are still going back and forth! Hope it worked for ya

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what the... i dont even think the stock exhaust with DPF and cat weigh that muchLOL