little help on engine sound

[scorched]

can anyone help me with what this sound is?

i dont think it is the dreaded tick. it only makes the sounds when cold. after the engine is good and hot, the ticking/tapping sounds goes away. any help would be much appreciated.

also, where in the southern nj general vicinity would you recommend taking it

 

[Vanilla Mustang]

its not an injector?

Going away when it warms up sounds like a valve to me, maybe not the typical head tick but perhaps one has developed.

 

[MalcolmV8]

Sounds like something up top to me. A valve maybe? For comparison here's my engine tick I had a couple years ago. Mine was piston #4 making noise in the cylinder after some highway pulls.

[nomedia="http://www.youtube.com/watch?v=RLIav2AbM4k"]YouTube - 03 cobra engine/transmission noise[/nomedia]

and a longer one

[nomedia="http://www.youtube.com/watch?v=UrG3cb5EHR8"]YouTube - 03 Cobra engine noise[/nomedia]

 

[scorched]

Its definately not an injector. Once it warms up and the ticking goes away you can hear the injectors. This is a much louder sound. I can't tell where its coming from. It can be heard all around the engine bay in front of the car etc.

 

[03yellow]

sounds like a lifter or valve. Start it,,, then take off oil cap on the valve cover while it running and listen.

 

[scorched]

Bump for any other opinions

 

[vettez062002]

rod....

 

[Punisher03]

sounds like a lifter or valve. Start it,,, then take off oil cap on the valve cover while it running and listen.

+1 ^^^

 

[MalcolmV8]

rod....

He said it goes away when the engine is warm. I've never seen a rod knock go away when warm.

 

[bodge323]

Piston slap?

 

[scorched]

it really sounds like its coming from the crank pulley. with the s/c belt off the sound gets much quiter, and it sounds like it coming from the crank. once the belt goes back on, the sound increases, and it does go up slightly with the rmps i will post videos.

this is the movement, and the sound of the pulley with car off

car on, s/c pulley off, the sound goes down

video is of the same area, note how much louder the noise gets

 

[redfr03svtsnake]

prob got a bad lower pulley deal.... the bearings between the pulley and the big ass hub that screws into the crank prob crapped out.... that things shouldnt have play in it like that last time i checked..

 

[scorched]

so a new lower pulley should do the trick right? at least from the way it sounds. just want to make sure before i go and buy another one

 

[MalcolmV8]

Do you have the stock lower on there now or an aftermarket lower? Can't quite make out those pics.

 

[scorched]

stock lower. but its making some very interesting sounds as you can tell from the videos. at least i am 90% sure its the lower pulley. just looking for a confirmation or two before i start spending some money

 

[MalcolmV8]

Well if you're really sure it's that lower pulley take it off and see if the sound is gone?
At least then you don't waste money on a replacement only to find the noise is still there.

 

[hotcobra03]

look thru the tread .. 4lb lower pulley that uses stock cage..it has alot of picks of this assembly ,disassembled down to just the parts...

http://www.svtperformance.com/forum...t-new-4lb-lower-pulley-uses-factory-cage.html



i was gonna say this also vs head tick

 

[scorched]

just thought i would give an update. changed out my lower the other day with used one (thanks 04mach1blurr!!) thanks to the fairly mild weather up here in nj recently.

anyways, with a replacement lower pulley and a new belt (mine had started squeaking in the previous two weeks. was terrible with a tap and a squeak)

all my sounds are gone!!! sounds like a normal driving car again. i am extremely thankful i didnt have to tear in to the motor. that would have been hell. now let the modding commence!!

thanks so much for all your help!