Tapping/knocking sound coming from my 6.4 - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 14 (permalink) Old 01-31-2008, 07:27 PM Thread Starter
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Tapping/knocking sound coming from my 6.4

Well, had my oil changed for the first time at 2300 miles at ford. Came home and parked it. Next day I got up to do some running around and at my first stop I noticed this nasty sounding noise while the truck was idling. The noise had no rythem to it and almost sounds like a tapping popping sound coming from somewhere on the back lowerhalf of the motor. I baby the hell out of the truck so it can't be something I caused, and I only started noticing the crappy noise after the First Oil change. Has anyone else experienced this type of noise and if so what is it, and is it damaging the motor. I plan on brining it in for service some time this weekend or early next week, but schedule is tough. I will add that whatever it is, it does not sound good!!!

2004.5 Dodge 2500 Quad Cab Cummins Powered, Laramie, Tow Pkg., Snow Plow Pkg., 4.10 Rears.

2008 Ford F-250 Crew Cab Lariat, 6.4 Powerstroke, Snowplow Prep, Automatic 3.73 posi, 18 inch wheels, SOLD!!!!
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post #2 of 14 (permalink) Old 01-31-2008, 08:12 PM
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7 pages of fun:
http://www.thedieselstop.com/forums/...-noise-179422/

And here's a brief explanation from a chevy diesel tech:
http://www.ford-trucks.com/forums/sh...7&postcount=10

Are we allowed to link to other forums? It's the best way to get the info fast, since it's been covered. :shrug:
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post #3 of 14 (permalink) Old 01-31-2008, 08:32 PM
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Quote:
Originally Posted by MRBOHN23
Well, had my oil changed for the first time at 2300 miles at ford. Came home and parked it. Next day I got up to do some running around and at my first stop I noticed this nasty sounding noise while the truck was idling. The noise had no rythem to it and almost sounds like a tapping popping sound coming from somewhere on the back lowerhalf of the motor. I baby the hell out of the truck so it can't be something I caused, and I only started noticing the crappy noise after the First Oil change. Has anyone else experienced this type of noise and if so what is it, and is it damaging the motor. I plan on brining it in for service some time this weekend or early next week, but schedule is tough. I will add that whatever it is, it does not sound good!!!

Your not alone with this issue. Our new town truck up here in massachusetts just started doing that today, wasn't doing it at idle, but high idle when it kicks up. Ford also just did an oil change a couple days ago as well. and this 2008 6.4L just turned 2000 miles. I don't know what it is but thank god i didn't pay for it. If it gets worse the mechanic is gonna know about it and i am sure he will give it back to ford. I have a bad feeling that there is gonna be some engines replaced under warrentee, i hate to say it.
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post #4 of 14 (permalink) Old 02-01-2008, 12:17 AM
 
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long shot but you might check it out.Attachment 15834
Attached Files
File Type: pdf tsb07-24-02.pdf (47.1 KB, 789 views)
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post #5 of 14 (permalink) Old 02-01-2008, 03:10 AM
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Ok does anybody not see the similarity's both happened after the first oil change which was done somewhere ie: dealership or service station ! Mechanics or not there are less desirable people getting paid to work on trucks these days. Maybe its not the truck that caused the problem ? I do all my own services the only true way to get the job done right ! I hope you get your issue resolved it way to young to have problems !
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post #6 of 14 (permalink) Old 02-01-2008, 03:49 PM Thread Starter
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Well, my 6.4 just went in for a possible surgery today. I stopped by my local ford dealership on the way home from work this morning and the head diesel tech came out to listen to the noise. And by his immediate reaction I knew something was wrong. He said yep, I hear it. Hang out for a few minutes and Ill let you know what I think. He came in to the office a couple minutes later and told me that it is something internal that he has never experienced before, and after checking online with Ford he was not liking what he was reading. He gave me a loaner car and I left my baby at the shop. Sounds to me like it is going to be a cab off disection of the motor. I think it could be something to do with the oil pump, but I'm not a mechanic. The noise is coming from the back middle of the motor, and it mostly occurs at an idle. Hey my thoughts are this: 50k for the truck, It should be damn near perfect, but if it isn't, then fix it as quickly and thoroughly as possible. My dealership rocks with customer service so I think they will fix it if they can or replace the motor. I just want pictures when the cab is off. If anyone else is hearing this noise, get yours in right away!

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2008 Ford F-250 Crew Cab Lariat, 6.4 Powerstroke, Snowplow Prep, Automatic 3.73 posi, 18 inch wheels, SOLD!!!!
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post #7 of 14 (permalink) Old 02-01-2008, 05:23 PM
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Quote:
Originally Posted by ZeroOne
And here's a brief explanation from a chevy diesel tech:
http://www.ford-trucks.com/forums/sh...7&postcount=10

Read this one, I freaked out when mine started doing this. I now have 85k and it still does it. Like the guy said, diesels have made this noise for more than 20 years. We just couldn't hear it over the other noise. I hope for everyone's sake this is the issue, which really isn't an issue. One thing I did notice was the switch to 5w40 synthetic seemed to make it less noticeable, but it is still there.
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post #8 of 14 (permalink) Old 02-01-2008, 11:27 PM
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I run 5w-40 amsoil !
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post #9 of 14 (permalink) Old 02-01-2008, 11:51 PM
 
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Yeah it used to happen to my dad's truck after the first oil change. Then it went away, a lot of peoples' predictions are that the service mechs overfill the oil. And thus this happens, the noise stopped after about 1000 miles, but learned a good lesson hes going to have to change the oil himself, or maybe i will have too..
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post #10 of 14 (permalink) Old 02-02-2008, 02:54 PM
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With all of these tapping noise symptoms happening after oil changes, I have a hard time believing that it is a serious mechanical issue. Maybe it is... but that "maybe" combined with the common nature of the problem is keeping me from allowing anyone to do anything to mine.

Haven't noticed the noise in a while, which could be since it's colder out and I don't usually hang out listening to the truck idle. Had the oil changed a couple of days ago, and I hear the sound again (but again, it could just be that I'm paying attention, with all of the growing paranoia).

One thing that I'm curious is to the type of oil used. Should be on your recepit.

Mine are:
5,000 - 15w40 (summer)
10,000 - 15w40 (fall)
15,000 - 10w30 (winter)

I've had the tapping after the 1st (through the summer) and 3rd (a few days ago). Was too busy during the period of the 2nd to have noticed anything. So that basically verifies 15w40 and 10w30 as present, for me.

Appreciation goes out to the guys willing to make the sacrifice of time and investment to find the root of the cause.
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