Stange noise from engine with video

Avengence · December 25th, 2008, 01:50 PM

Can anyone tell me what this noise is? Its the louder clunking noise. It doesnt cause an idle change or shake the car.

YouTube - Mystery Engine Noise 2005 Mustang GT

original post in a diff forum:

Ok, new problem... engine clunking? - MustangForums.com

trill gear head · December 25th, 2008, 02:00 PM

Sounds like a exhaust leak. I have the same sound coming from my 4.0L

brianm · December 25th, 2008, 02:09 PM

sounds like something mechanical to me.

07 STROKER · December 25th, 2008, 02:18 PM

what are your mods besides the K&N ?

07 Grabber GT · December 25th, 2008, 02:25 PM

I'd like to hear it with varying rpm's ... initially it sounds like an exhaust leak.

07 STROKER · December 25th, 2008, 02:52 PM

doesint sound like a exhaust leak to me.

Avengence · December 25th, 2008, 03:45 PM

no other engine mods

JakeM · December 25th, 2008, 04:55 PM

Originally Posted by trill gear head

Sounds like a exhaust leak. I have the same sound coming from my 4.0L

That is not a exhaust leak. That is something mechanical for sure.

GT33 · December 25th, 2008, 06:02 PM

it sorta sounds like a clutch chatter. cause my spec has a similar sound sometimes..idk thats my guess.

weldreth · December 25th, 2008, 06:37 PM

every newer gt i heard has that noise in the valvetrain.... normal??? not as loud as that though

Dr Detail · December 25th, 2008, 09:33 PM

Get short piece of broom stick or a long screw driver and hold it to your ear and on the cam cover and listen to the valve train,moving from cyl to cyl. You can use this trick isolate many strange noises coming from engines, like bad alternator bearings,etc.To my ear it reminds me of a bad rod bearing, to determine which one disable each spark plug one at a time till the noise stops. By eliminating the load(combustion) on the rod the noise will go away or at least lighten up. Don't ask about how I know the rod bearing trick.

UrbanRedneck · December 25th, 2008, 11:28 PM

Sounds like a collapsed lifter. Is there oil in the car? When you revv the engine, does it get faster and louder? Does it get louder when the engine slows back down than when it speeds up (that'd be more likely a rod bearing)?

Avengence · December 25th, 2008, 11:40 PM

There is oil in it, I checked it and it shows there is enough oil in there.

It doesnt get any faster or louder, it actually quiets down the more it revs. It does get a little faster though, just quieter as the revs get higher.

Dr BlackStang · December 25th, 2008, 11:45 PM

hmm my guess would have been a lifter tapping too, but if it doesnt get faster with higher rpms then thats not it...

2006greyGT · December 26th, 2008, 12:26 AM

it can be many things.. most of them not good... were you running it hard before it started? what weight oil are you running? the noise might go away with a thicker oil. it could be cam phaser lash which can be caused by the computer advancing/retarding the timing. It could also be a pulley on the serpentine belt... it it wasn't being beaten then it could be electrical/programing/oil pressure. if it was driven hard just before the problem started then it could be deeper... another way to isolate the noise is take a piece of vacuum line and use it like a stethoscope..

Avengence · December 26th, 2008, 12:56 AM

Sorry i mis-worded my last post. I meant to say it DOES get faster with revs but gets quieter with more revs.

I do drive it hard sometimes so I guess it could be something mechanical. Its just weird that the CANBUS system reset and then I really noticed the problem. It seems to me like its coming from the top of the engine on the passanger side. Seems more likely to be something in the head, people have told me that the cam phaser gear can go bad and cause a loud noise like that and I guess a loss in power because its not advancing the timing. Isnt there spring in there that makes it return after advancing the timing, when the oil pressure goes back down?

I am very lost in this but I guess I will keep searching for the answer. My wife told me that she sort of hear this noise before the CANBUS system go reset but after it reset it seems to have gotten louder. It just confuses me a LOT

stangNV · December 26th, 2008, 01:39 AM

all ive heard have the same noise also but not as loud......sounds kinda bad

trill gear head · December 26th, 2008, 01:55 AM

Originally Posted by Towelly

That is not a exhaust leak. That is something mechanical for sure.

well shit, i guess I better get my stang looked at by my mechanic.

psfracer · December 26th, 2008, 02:20 AM

Cam follower or exhaust leak. If you have the stock manifolds, then the likelihood of it being an exhaust leak is pretty slim. With a bad cam follower it would make sense that the sound is coming from the "top" of the engine.

Avengence · December 26th, 2008, 02:25 AM

Would a cam follower cause a decrease in power?

December 25th, 2008, 02:09 PM	#3
brianm Hardcore Enthusiast 2011 ram 1500 hemi Join Date: Sep 2007 Location: sylvan lake, alberta Posts: 1,336 iTrader: 0 reviews	sounds like something mechanical to me. __________________ vmp500 hp. jba lts. powerhouse d/s Sold

December 25th, 2008, 02:18 PM	#4
07 STROKER MM's resident Juice head 07 Mustang GT Join Date: Nov 2007 Location: PA Posts: 7,920 iTrader: 0 reviews	what are your mods besides the K&N ? __________________ The MGW short throw shifter Its not just a shifter...It's a lifestyle!

December 25th, 2008, 02:52 PM	#6
07 STROKER MM's resident Juice head 07 Mustang GT Join Date: Nov 2007 Location: PA Posts: 7,920 iTrader: 0 reviews	doesint sound like a exhaust leak to me. __________________ The MGW short throw shifter Its not just a shifter...It's a lifestyle!

December 25th, 2008, 06:02 PM	#9
GT33 Enthusiast 2006 Join Date: Jul 2007 Location: South Florida Posts: 509 iTrader: 0 reviews	it sorta sounds like a clutch chatter. cause my spec has a similar sound sometimes..idk thats my guess. __________________ Just a bottle and some mufflers))) 18yrs old S.FL

December 25th, 2008, 06:37 PM	#10
weldreth Regular 2005 Mustang GT Join Date: Dec 2008 Location: MD Posts: 241 iTrader: 0 reviews	every newer gt i heard has that noise in the valvetrain.... normal??? not as loud as that though __________________ puedo tocar tu gato?

December 25th, 2008, 02:25 PM	#5
07 Grabber GT Regular 2007 GT Join Date: Oct 2006 Location: Rota, Spain Posts: 433 iTrader: 0 reviews	I'd like to hear it with varying rpm's ... initially it sounds like an exhaust leak.

December 25th, 2008, 03:45 PM	#7
Avengence Regular 2005 Mustang GT 13.4@103 Join Date: Jul 2008 Location: Sacramento, CA Posts: 243 iTrader: 0 reviews	no other engine mods

December 25th, 2008, 09:33 PM	#11
Dr Detail Regular Join Date: Dec 2008 Location: Ormond Beach,Fl Posts: 76 iTrader: 0 reviews	Get short piece of broom stick or a long screw driver and hold it to your ear and on the cam cover and listen to the valve train,moving from cyl to cyl. You can use this trick isolate many strange noises coming from engines, like bad alternator bearings,etc.To my ear it reminds me of a bad rod bearing, to determine which one disable each spark plug one at a time till the noise stops. By eliminating the load(combustion) on the rod the noise will go away or at least lighten up. Don't ask about how I know the rod bearing trick.

December 25th, 2008, 11:28 PM	#12
UrbanRedneck Hardcore Enthusiast 2008 Mustang GT 13.124@105.52 Join Date: May 2008 Location: Chicago Posts: 2,138 iTrader: 1 reviews	Sounds like a collapsed lifter. Is there oil in the car? When you revv the engine, does it get faster and louder? Does it get louder when the engine slows back down than when it speeds up (that'd be more likely a rod bearing)? __________________ Hurst Crew Member #20 2008 GT - ARH, C&L, Hurst, BORLA, BMR, Bilstein, FRPP, Axle Exchange. Awesome.

December 25th, 2008, 11:40 PM	#13
Avengence Regular 2005 Mustang GT 13.4@103 Join Date: Jul 2008 Location: Sacramento, CA Posts: 243 iTrader: 0 reviews	There is oil in it, I checked it and it shows there is enough oil in there. It doesnt get any faster or louder, it actually quiets down the more it revs. It does get a little faster though, just quieter as the revs get higher.

December 25th, 2008, 11:45 PM	#14
Dr BlackStang Regular 2007 Mustang GT Join Date: Oct 2008 Location: Summerville, SC Posts: 139 iTrader: 0 reviews	hmm my guess would have been a lifter tapping too, but if it doesnt get faster with higher rpms then thats not it... __________________ C&L CAI XCAL 3/Brenspeed Tuned Cervini Ram Air Hood Hooker LTs/ or Xpipe Borla Stingers Hurst Competition Plus short throw Steeda UD pulley Ford Racing 4:10s

December 26th, 2008, 12:26 AM	#15
2006greyGT Premium Member 2006 Satin Silver GT 11.08@125.22 Join Date: Aug 2007 Location: KC Posts: 3,073 iTrader: 0 reviews	it can be many things.. most of them not good... were you running it hard before it started? what weight oil are you running? the noise might go away with a thicker oil. it could be cam phaser lash which can be caused by the computer advancing/retarding the timing. It could also be a pulley on the serpentine belt... it it wasn't being beaten then it could be electrical/programing/oil pressure. if it was driven hard just before the problem started then it could be deeper... another way to isolate the noise is take a piece of vacuum line and use it like a stethoscope.. __________________ 2.6l KENNE BELL 298 Stroker, Ported heads Pro Motion Built 3650/McLeod RST/ MGW Short Throw Long tube/O/R X /Borla Touring 8 rib/65 lb injectors/GT500 twin fuel ET Drag Slicks/3.73 gear Detroit Truetrac /CDC AGR Spoiler

December 26th, 2008, 12:56 AM	#16
Avengence Regular 2005 Mustang GT 13.4@103 Join Date: Jul 2008 Location: Sacramento, CA Posts: 243 iTrader: 0 reviews	Sorry i mis-worded my last post. I meant to say it DOES get faster with revs but gets quieter with more revs. I do drive it hard sometimes so I guess it could be something mechanical. Its just weird that the CANBUS system reset and then I really noticed the problem. It seems to me like its coming from the top of the engine on the passanger side. Seems more likely to be something in the head, people have told me that the cam phaser gear can go bad and cause a loud noise like that and I guess a loss in power because its not advancing the timing. Isnt there spring in there that makes it return after advancing the timing, when the oil pressure goes back down? I am very lost in this but I guess I will keep searching for the answer. My wife told me that she sort of hear this noise before the CANBUS system go reset but after it reset it seems to have gotten louder. It just confuses me a LOT

December 26th, 2008, 01:39 AM	#17
stangNV Regular 07 Mustang GT Join Date: Mar 2008 Location: Texas Posts: 337 iTrader: 0 reviews	all ive heard have the same noise also but not as loud......sounds kinda bad __________________ JLT II, Superchips 93 Octane Tune(Finally have the SCT X3), Steeda UDP's, Bassani Catted X, Bassani Race Axlebacks

December 26th, 2008, 02:20 AM	#19
psfracer Regular $psfracer's Avatar$ 2006 mustang GT 9.417 @ 142.96 mph Join Date: Apr 2008 Posts: 108 $psfracer is on a distinguished road$ iTrader: 0 reviews	Cam follower or exhaust leak. If you have the stock manifolds, then the likelihood of it being an exhaust leak is pretty slim. With a bad cam follower it would make sense that the sound is coming from the "top" of the engine. __________________ 2005 Mustang GT Auto - Whipple @ 18 psi - 604 rwhp 543 rwtq

December 26th, 2008, 02:25 AM	#20
Avengence Regular 2005 Mustang GT 13.4@103 Join Date: Jul 2008 Location: Sacramento, CA Posts: 243 iTrader: 0 reviews	Would a cam follower cause a decrease in power?

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Stange noise from engine **with video**