new noise that i can't trace - Diesel Forum

zedbyers · 08-11-2006, 03:44 PM

i have noticed in the last few weeks that i am getting a new noise. it sounds like something rotating (or possibly metal against metal rubbing) that isn't lubricated, sort of a metal on metal chirping. it is most noticable under very light load at any speed. when you take your foot off the gas pedal it drops off to nothing. it is also temp related, because you don't hear it until the truck is up to temp. barely hear it at idle, and it seems like it only has 2 frequencies, depending on if your foot is on the throttle or not. we just did a long trip and i noticed it more when i was in the passenger seat. it is rather annoying to me, althought my wife thinks i am crazy. i am guessing it is a belt driven accessory?? any experience or ideas???

moovet · 08-11-2006, 04:37 PM

I could be wrong ...but I would bet lots of cash on it being your HPOP quick connect fitting....under which lies an o-ring and when that begins to fail you will have longer crank times on warm starts..and eventually it dies or does not start either way needing to be towed in...I have been chasing the noise for a while and have replaced the belt, idler pulley , alternator, droped the tranny pan, and inspected the turbo....through the process of elimination and much reading I now know what it is...there is an updated fitting for 05/06's (problem years) the part # is 4c3z-9b246-a...it has a bracket to prevent the problem...
jschall

torino73 · 08-11-2006, 06:07 PM

There was a post on this a couple weeks ago- I think? My truck has had a chirp under light load since it was new. I never noticed that it was temp sensitive, but then again, nerve damage in my ears leaves me somewhat oblivious at times. I have gotten used to it, and I ignore it- my wife thinks I'm nuts too. My truck has 24K on it and runs great. Tune it out, and don't sweat it- if it's the same noise I have. Sounds like a cricket on speed.

moovet · 08-11-2006, 10:25 PM

At 23k mine sounded the same as yours torino...problem is arround 46k it took on a different demenor....if in deed we are all talking about the same noise......if it's a 05/06 you better off having it checked then being left hunting a tow truck..in my opinion....they seem to go one of two ways progressively worsen with noise (mine) and sudden failure with no symptoms noted by owner....good luck..
jschall

moovet · 08-11-2006, 10:28 PM

O yea it runs great untill it don't run at all...it will however start taking longer to start warm...
jschall

torino73 · 08-12-2006, 06:13 AM

As I said, mine has done this since it was new, never got any worse, starting not an issue. After reading the several hundred posts about turbo problems, I am certainly not discounting your obviously genuine concern, but I'm not going to lose any sleep 'till the thing craps or nears the 100K limit. From what I have heard, trading for the 6.4 wouldn't be smart either, so I'll probably drive this truck 'till it implodes, and then (gulp) get a gasser.

snoeproe · 08-12-2006, 11:14 AM

i just started noticing this chirp on mine last week.
it only does it at low speed, taking off from a stand still. once up to speed it seems to stop.
it does not make the noise all the time, just periodicaly.
sounds like something in the drive system to me, comming from under the truck. u Joint or a bearing of some sort?

moovet · 08-12-2006, 11:51 AM

Mine did it new too torino did not start progressing tell arround the 45k mark and the noise Im talking about is independant of the turbo....although the hpop does live underneath the turbo Im not taliking about the turbo..so perhaps we are talking different noises ..and the one Im refering too only occurs with a warm engine never cold as the orriginal poster cited.....so Im not sure were on the same internet noise page or not....but the noise Im refering to does not occur at idle...so the tech has to command IPR to 45% and run the rpms up while listening to the hpop cover with a stethascope.....hope all this typing helps someone anyway..
jschall

dvtech · 08-12-2006, 04:13 PM

how many miles does this trk. have on it? has ever hydrostatically locked before. i worked on one before that had locked up from a over fueling concern & found the rear crank throw scrapeing against the block. it made a high pitch mettalic noise like you discribed.

Bullrack · 08-12-2006, 04:19 PM

That's how mine started over a month ago. Never on a cold engine either. Did not get progressively worse either. I was beginning to think I was having dual-mass flywheel problems or maybe clutch related. Parked in driveway one evening after picking it from Ford dealer, it sat at the dealer for 7 days. Dealer verified noise when I dropped it off, but never could get it to do this again. I suppose because they were not getting it warm enough. Long story short, The morning after I parked it, got in it, fired it up and it ran ran for a few seconds before dying. It never started again. Goosenecked it to another dealer, they tore into it slowly, and on the third day called me and said they were orderring a shortblock for it. A lifter was the cause of this problem. I'm starting to hear of quite a few 6.0's with this problem. Four other trucks over at The Diesel Garage.

zedbyers · 08-13-2006, 09:52 PM

guys thanks for the info....i did 13 hours in the truck today driving from Western PA back to Maine and i also noticed that when there is no engine noise while coasting down a hill with no throttle that this noise i am referring to also goes away, but as soon as you start to hear engine noise (when torque converter unlocks??) you also get this chirping noise along with it....

zedbyers · 08-13-2006, 09:57 PM

truck has 5000 miles on it....what you describe, i would think would happen once it is up to temp and then all the time. i am not getting this noise all the time, and the frequency doesn't seem to change that much over the RPM range, but it does some.

zedbyers · 08-14-2006, 09:30 AM

jschall...i owe you a beer....

took it in this am for 5000k 'free' service. told them about the noise and the HPOP quick connect. 1/2 hour later service advisor said i was all set and that the noise was coming from resonance in the performance exhaust that i installed. we talked a bit more then i got with the tech that serviced the truck. he was hearing the same noise as me, but it seems as though the service manager never told him what i had passed on. he went into the computer and low and behold existed a TSB describing what was going on exactly was we were finding. hooked up to diagnostics and changed the oil pressure at idle, put the stethoscope on it, and sure enough new parts are now on order....

sure beats being left dead in the water somewhere.....

thanks buddy!!

moovet · 08-14-2006, 02:00 PM

Your vary welcome zedbyers..sounds like you have a good technition worthy of a small tip for appreciation.....I began reading your post and said o man I hope he don't play with adjusting his exhaust for 4 hours like I did....lol..I can laugh about it now....
jschall

ghostbuster · 08-14-2006, 03:09 PM

zedbyers, how loud was the noise? Possibly a better discription of the noise? Frequency of the tick, 1/2 engine speed, 2x engine speed etc? Could you hear it over road noise, the AC fan on or the radio? A few tow trucks that I work on make a slight tick at cruise, can only hear it with the radio and fan off, sounds like normal engine noise but maybe not. Did you have any long crank issues?