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Brandon
Dodge Dakota
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5/16/2008
13:30:14
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 Subject: 2006 Dakota engine knock
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OK, I posted on here a while back talking about my 2006 Night Runner 4.7 HO Dakota having an engine knock at cold start up. I took the truck into the dealer in October with 6,200 miles on it and they couldn't duplicate the problem but recommended me using a MOPAR filter instead of a Fram. I had also put 10w-40 oil in it. So, I changed the filter and put 5w-30 in it right after getting it back from the dealer. I put maybe 1500 miles on it or so and then stored it for the winter.
I got the truck out again finally at the beginning of April and it was still knocking. I put maybe another 500 miles on it and figured I better take it back in. So, I did and had to be there when they started it to point out the noise. The tech told me it was just a little lifter knock. Well, in my opinion, any knocking coming from the engine isn't good. The truck is still under warrenty. They said it might take care of itself.
So, here is what they did; they changed oil in it again(which for some reason I had to pay for) and told me to drive for 3 months/3000 miles. The tech told me that if it was his truck and only had 8000 miles on it that he wouldn't want someone tearing the whole engine apart just for the lifters. They just didn't seem to want to do the work. They tried to blame the problem on the pushrods sitting on the lifters all winter or the fact that I changed from 10w-40 to 5w-30 and maybe never got all the 10w-40 oil out.
Anyway, I have been driving it more regularly now and everytime I start it up it knocks. It almost seems worse now then before. So, I have no doubt that I will be taking it back in to have the lifters replaced.
So, just wanted to update everyone on this. Anybody else have this problem? Anybody have any opinions on my situation? I would like to put a cat-back dual exhaust system on it but am afraid to until they get that lifter issue fixed. Does that sound stupid? Exhaust like Gibson isn't supposed to void the warrenty correct?
Thanks,
Brandon
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daddio
Dodge Dakota
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5/16/2008
17:11:25
| RE: 2006 Dakota engine knock
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"They tried to blame the problem on the pushrods sitting on the lifters all winter"? you better find another dealer A.S.A.P. because a 4.7 doesn't have pushrods!!!!!!!!!!!!!
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dakota49
Dodge Dakota
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5/17/2008
02:44:19
| RE: 2006 Dakota engine knock
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From what you have said, it sounds to me what you are describing is rod knock, and when the oil pressure comes up it stops. With less than 10,000 miles, that doesn't seem likely though. Still, I would find another dealer like daddio said, and try to get it fixed as soon as possible.
Good Luck
Dakota49
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Kowalski
GenIII
5/17/2008
07:20:05
| RE: 2006 Dakota engine knock
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This sounds serious enough that I'd hold off on the exhaust. The mod would mostly only make the exhaust louder so it's harder to hear the engine noise - little if any power gain.
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Brandon
Dodge Dakota
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5/18/2008
03:50:03
| RE: 2006 Dakota engine knock
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Thanks for the input guys. I am pretty sure the guy said pushrods. I am not all that familiar with the 4.7's, so how do the lifters and cam work exactly on this? What "should" the guy have said instead of pushrods?
Also, in regard to dakota49's response, when you first start the truck up, it idles higher because its cold and you don't here any knocking sound at all. But, you start to hear it as it idles itself down. So, it seems to last a lot longer than it would take for the oil pressure to come up. I think this was the issue when I took it in in October. Then started it up and because it was cold, it idled high and they never let it idle down, so they never heard anything because they gave up on listening too quick. Also, I have never just started it and let it idle to see how long it would make the noise. Maybe I will try that sometime.
Otherwise, the exhaust thing is out the window for now then. Also, and maybe this is a dumb question, but I have never owned a new vehicle that had a warrenty before: can I take the truck to another Dodge Dealer and they will fix the problem too? I don't have to always take it back to the place I bought it from while its under warrenty?
Thanks again everybody.
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RadioMan
Dodge Dakota
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5/18/2008
06:57:54
|  RE: 2006 Dakota engine knock
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Try a quart of Reslone (Spelling may be wrong).
It frees up stickey lifters. Use it in place of
one quart of oil.
I had a older 318 V8 and it did wonders..
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Kowalski
GenIII
5/18/2008
08:14:37
| RE: 2006 Dakota engine knock
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You should be able to take it to any Dodge dealer.
It's tough to say what the guy should have said instead of pushrods - since we don't know what the problem is yet. Valve noise is more commonly referred to as tapping, than knocking - so if it's a heavier knock, it might not even be valve related. Can you get a sense of where the noise is coming from under the hood ? Higher, or lower in the engine ? The 4.7 is an overhead cam design - where the cam lobes act directly to open the valves. Like daddio says - no pushrods.
Lead, follow, or get out of the way
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Brandon
Dodge Dakota
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5/19/2008
12:14:13
| RE: 2006 Dakota engine knock
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Does the cam act on the lifters and the lifters act on the valves? Is that how it works then?
Some more info, I backed my truck out of the garage yesterday morning and let it sit idleing for about 5 minutes and it knocked the entire time. I left and drove for maybe another 5 minutes and when I came to a stop, I let it idle for a little bit again and now there was no noise at all. So, it can sit there and warm up while idleing and the noise stays, or it can warm up while driving and the noise goes away. What does this mean?
The sound could be tapping instead of knocking, but I can't be sure. My initial thought when it first started doing this was a lifter sound. And then, thats what the dealer tech also said; "just a little lifter knock". He didn't even think it was that serious.
I am not sure what to do now; take it somewhere else right away, or wait the 3 months/3,000 miles and take it back to the same dealer. There are two dealers of the same name in the immediate area and then there is a different Dodge dealer a little farther away.
Thanks for the help everyone.
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Josh
Dodge Dakota
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5/21/2008
00:17:00
| RE: 2006 Dakota engine knock
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Brandon. The same 4.7L engine is used in some Jeep models, so you can also take it to any Jeep dealer if you're not satisfied with Dodge service.
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brianj
Dodge Dakota
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5/21/2008
00:17:17
| RE: 2006 Dakota engine knock
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TAKE IT TO A DIFFERENT DODGE DEALER!!!
brandon, this is getting kind of hard to do over via internet to diagnose.
just dont be afraid to push this issue, and dont be affraid to ask questions to the tech.
but do keep us informed.
im not trying to be a jerk... but is this a pretty distinctive sound? or are you just being a little to picky? meaning maybe thats just the way the engine sounds.
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Brandon
Dodge Dakota
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5/21/2008
09:32:54
| RE: 2006 Dakota engine knock
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Believe me, I am not being too picky. Engines aren't supposed to make this noise. I will end up taking it somewhere else, I just don't know when I am going to get around to it. And I will keep you informed.
Thanks guys
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Kowalski
GenIII
5/21/2008
15:48:29
| RE: 2006 Dakota engine knock
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There is still a hydralic adjuster in the valve train, but not called a lifter. Could be what you are hearing if one is leaking down. Good luck.
Lead, follow, or get out of the way
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daddio
Dodge Dakota
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5/21/2008
15:56:11
| RE: 2006 Dakota engine knock
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Brandon, i just reread your oirignal post and saw you switched to a Mopar flter. i tried one of those on my '00 QC 3.9 and i don't think i'll be using another. shortly after changing the oil and installing the Mopar filter, my engine developed a lifter tick on cold starts. i've since changed the oil(same brand and weight i've always used) and installed another Wix filter. and as i guessed the lifter tick is gone. could have just been a defective Mopar filter but i will not take another chance with one.
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DSW
Dodge Dakota
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5/21/2008
23:38:38
| RE: 2006 Dakota engine knock
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I agree with daddio, Wix filters are top of the line. Try one of these with some synthetic oil and see what happens.
As far as the noise, is it a knock or a tick? Lifter tick is common for the 4.7's when they are cold, some do it, some don't. I bought an 01 4.7 that had lifter tick, I switched to Mobil 1 and the tick was gone in a few thousand miles. All in all I've had 3- 4.7 engines and the lifter tick comes and goes on cold start-up. But in my experience, the tick stops once the engine warms up a bit.
Yes, no push rods in a 4.7, the engine uses "cam followers". I've heard the tick noise is caused by bad cam follower(s). If memory serves me right (I hope),,, one end of the cam follower sits on a pivot, the other end sits on the valve stem and the cam lobe rides on a bearing in the center of the cam follower, no lifter used to keep the valve train tight.
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DSW
Dodge Dakota
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5/21/2008
23:47:48
| RE: 2006 Dakota engine knock
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Edit; the "pivot" I mentioned has to be a hydraulic adjuster of sorts since there is no way to adjust the valves. Not quite sure as I don't have the manual in front of me, just going off memory from installing HO cams,,, so don't flame me too hard ;-)
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Brandon
Dodge Dakota
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5/30/2008
11:45:10
| RE: 2006 Dakota engine knock
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Ok, heres the latest. I made an appointment at another dealer to have it looked at and I left it at their shop Memorial Day evening so they could look at it Tuesday morning. I never heard anything from them all day Tuesday so I finally called them and they proceeded to tell me that they didn't hear any abnormal noises. This is the third time this has happened to me. So, I had to take a day off of work to go there Wednesday morning to be there when they started it again. They had me start it and within the first 5 seconds of it running the noise was there. The guy heard it this time. He thought it was a lifter too, so I am now getting new lifters installed. Should have the truck back next week. I will see if that solves the problem or not though.
I will keep everyone posted after I get it back.
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daddio
Dodge Dakota
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5/30/2008
12:13:49
| RE: 2006 Dakota engine knock
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glad to hear you got someone to finally see there was a problem and to get working on it. hope all goes well.
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onearmsteve
Dodge Dakota
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5/31/2008
00:01:28
| RE: 2006 Dakota engine knock
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they are called valve lash adjusters. and mine were ticking bad at cold start up.so i put ho cams and all new valve lash adj and it still ticks a little.
00 qc 4x4 4.7 125000 mi
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daddio
Dodge Dakota
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5/31/2008
23:56:32
| RE: 2006 Dakota engine knock
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no sh!t onearmsteve.
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onearmsteve
Dodge Dakota
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6/02/2008
17:54:05
| RE: 2006 Dakota engine knock
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well you guys keep talking about what there called and cant make up your mind.im just trying to help.
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Kowalski
GenIII
6/04/2008
08:23:50
|  RE: 2006 Dakota engine knock
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Your post was helpful, as the proper term escaped me. That post came from the site spoofer trying to stir things up; not dadio.
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