Engine noise on startup goes away after a few seconds... HELP! - Dakota Durango Forum
4.7L/4.7L HO/4.7L Gen II Engines Questions regarding the 4.7L V8 engine

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post #1 of 32 Old 07-09-2011, 08:49 PM Thread Starter
greendurango
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Engine noise on startup goes away after a few seconds... HELP!

Hello Everyone!

I have got a noise on Startup that last for a few seconds on my 2001 Durango 4x4 w/ 4.7 engine, at first I thought it was my exhaust manifolds leaking or making a noise, well I replaced both exhaust manifolds and put new Remflex gaskets on, I took off the belt to see if the noise went away, to eliminate the water pump, pulleys, fan, etc, the noise was still there So, I am back to the drawing board I have swiched oil filters, I was using Mopar filters, then I went to the Napa Gold Filter still no change in the noise it all I was running Mobil 1 5w30, then switched to Pennzoil Ultra 5w30 still no change, I downloaded a sound clip for you all to hear, ==== Thanks for your help!============


http://s669.photobucket.com/albums/v...0709130337.mp4

Gotta have it!!

2001 DODGE DAKOTA QUAD 4.7 4X4
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post #2 of 32 Old 07-09-2011, 11:05 PM
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Are you talking a loud clatter for a brief second at start up? Almost sounds like timing chain noise to me...but I don't know why it would go away so quickly. Maybe a tensioner is bleeding down? I really don't know...
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post #3 of 32 Old 07-10-2011, 03:29 AM Thread Starter
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Thanks, yeah its driving me crazy trying to figure out what it is, so timing chains tensioners can make the same noise? its drives fine and all, just wish I knew what it was!

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post #4 of 32 Old 07-13-2011, 04:25 PM Thread Starter
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would changing the oil to 10w30 get rid of the noise?

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post #5 of 32 Old 07-13-2011, 11:58 PM
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doubt it would but you can try
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post #6 of 32 Old 07-16-2011, 06:17 AM Thread Starter
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I tryed switching to the 10w30 it did not help, I am beginning to think its in the filters anti-drainback valve, I use the Napa gold any one else have this problem? thanx

Gotta have it!!

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post #7 of 32 Old 07-16-2011, 07:32 PM
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The audio is so compressed I can't pick out any weird sounds excepts a couple faint knocks on start up. Is that what you're talking about is the knocking noise? I don't see how a new oil filter can make an engine noisy, its gotta be an internal problem.

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post #8 of 32 Old 07-18-2011, 05:15 AM Thread Starter
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Smile

Quote:
Originally Posted by Josh_101 View Post
The audio is so compressed I can't pick out any weird sounds excepts a couple faint knocks on start up. Is that what you're talking about is the knocking noise? I don't see how a new oil filter can make an engine noisy, its gotta be an internal problem.
I just recorded a better sounding clip, check it out: http://www.zshare.net/audio/92725240b36def80/

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post #9 of 32 Old 07-19-2011, 06:11 PM Thread Starter
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Bump!

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post #10 of 32 Old 07-19-2011, 07:46 PM
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Lifter clatter at start up then oil gets to them and quiets down.

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post #11 of 32 Old 07-19-2011, 10:47 PM
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Bad muffler bearings.

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post #12 of 32 Old 07-19-2011, 11:08 PM
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The 4.7 is OHC.. It doesn't have lifters.. It has hydraulic lash adjusters.. But that sounds like what it is. My truck had a similar noise, which went away after I flushed the engine.

I forget where I saw the recipe, but I've used it (about 30,000 miles ago) and this stuff works like industrial engine draino - the crap that comes out looks like oil that's been in service for 60,000 miles. You will need 3 cheapo oil filters (they'll only be run for 30 minutes each), one of your normal oil filters, two gallons of kerosene, one large bottle of Marvel Mystery Oil, seven quarts of cheapo 10w30, and 6 quarts of your favorite 5w30 or 0w30 oil.
  • Bring engine to operating temperature then shut off
  • Drain oil thoroughly and change filter for one of the cheapos
  • Add 4 quarts of kerosene, 1 quart cheapo 10w30, and 1 pint Marvel Mystery Oil to the crankcase and start the engine.
  • DO NOT REV THE ENGINE OR DRIVE THE TRUCK UNDER ANY CIRCUMSTANCES! IT MUST STAY AT IDLE AT ALL TIMES DURING THIS PROCESS!! Kerosene IS a lubricant, and it will protect your bearings at idle, but not much faster. Revving will cause you to spin a bearing and more
  • Allow engine to idle 30 minutes at operating temperature
  • Stop engine and immediately drain crankcase. Observe the color of what comes out.
  • Change oil filter for another cheapo
  • Refill with four quarts kerosene, one quart cheapo 10w30, and one pint MMM, Start engine and run another 30 minutes.
  • Stop engine and immediately drain crankcase. Observe what comes out - it will still be nasty but should be much lighter in color
  • Change oil filter for the last cheapo
  • Refill with FIVE quarts cheapo 10w30 and one QUART MMM. (This is just a 'final flush' to get rid of the kerosene.) Start engine and run another 30 minutes.
  • Stop engine and immediately drain crankcase (thoroughly - let it drain for a while so anything in the top of the engine has a chance to drip down). There shouldn't be much gunk left in the engine at this point, so what comes out should be much lighter than before.
  • Change oil filter for your regular quality one
  • Refill with 6 quarts of your favorite oil.

All "oil starvation" noises should be gone at this point.



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Last edited by TazRango; 07-20-2011 at 05:07 AM.
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post #13 of 32 Old 07-19-2011, 11:54 PM
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ahh yes. i wasnt thinking. im used to my ls series motors where it's a given chevy thing.

Ahh muffler bearings yes! check blinker fluid also.. may lead to noise

01 QC 4.7L-Superchips,4.10's,e-fan,bbk 70mm tb,CAI,magnaflow w/3in stainless side exit exhaust no cats,100shot,20x10's, 2/3 drop,Billet grille+bumper inserts,cadence 10's,autotek 1000watt amp,Alpine cdplayer,Painted Stuff
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post #14 of 32 Old 07-20-2011, 10:20 PM Thread Starter
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Quote:
Originally Posted by WestCoastKevin View Post
Bad muffler bearings.

Gotta have it!!

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post #15 of 32 Old 07-20-2011, 10:22 PM Thread Starter
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Quote:
Originally Posted by TazRango View Post
The 4.7 is OHC.. It doesn't have lifters.. It has hydraulic lash adjusters.. But that sounds like what it is. My truck had a similar noise, which went away after I flushed the engine.

I forget where I saw the recipe, but I've used it (about 30,000 miles ago) and this stuff works like industrial engine draino - the crap that comes out looks like oil that's been in service for 60,000 miles. You will need 3 cheapo oil filters (they'll only be run for 30 minutes each), one of your normal oil filters, two gallons of kerosene, one large bottle of Marvel Mystery Oil, seven quarts of cheapo 10w30, and 6 quarts of your favorite 5w30 or 0w30 oil.
  • Bring engine to operating temperature then shut off
  • Drain oil thoroughly and change filter for one of the cheapos
  • Add 4 quarts of kerosene, 1 quart cheapo 10w30, and 1 pint Marvel Mystery Oil to the crankcase and start the engine.
  • DO NOT REV THE ENGINE OR DRIVE THE TRUCK UNDER ANY
    CIRCUMSTANCES! IT MUST STAY AT IDLE AT ALL TIMES DURING THIS PROCESS!!
    Kerosene IS a lubricant, and it will protect your bearings at idle, but not much faster. Revving will cause you to spin a bearing and more
  • Allow engine to idle 30 minutes at operating temperature
  • Stop engine and immediately drain crankcase. Observe the color of what comes out.
  • Change oil filter for another cheapo
  • Refill with four quarts kerosene, one quart cheapo 10w30, and one pint MMM, Start engine and run another 30 minutes.
  • Stop engine and immediately drain crankcase. Observe what comes out - it will still be nasty but should be much lighter in color
  • Change oil filter for the last cheapo
  • Refill with FIVE quarts cheapo 10w30 and one QUART MMM. (This is just a 'final flush' to get rid of the kerosene.) Start engine and run another 30 minutes.
  • Stop engine and immediately drain crankcase (thoroughly - let it drain for a while so anything in the top of the engine has a chance to drip down). There shouldn't be much gunk left in the engine at this point, so what comes out should be much lighter than before.
  • Change oil filter for your regular quality one
  • Refill with 6 quarts of your favorite oil.

All "oil starvation" noises should be gone at this point.
was your noise similar to mine? could this clog up your oil pump?

Gotta have it!!

2001 DODGE DAKOTA QUAD 4.7 4X4
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