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Discussion summary
YOUR RESEARCHEngine gurus: I need help with a sound!
Leading reported evidence
Check by my indy asap
Performed · outcome unconfirmed
No successful repair reported for this finding.
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0
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1
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Read evidence and context
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Leading evidence: 'Check by my indy asap' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check bench' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
tightened after coil pack install), or an problem with one of the cats.
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Suggestion
I did not think so, take it back to the shop and have them check the bench for extra hardware or pull the intake and see what was left loose.
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Suggestion
Check the heatshields for the coil packs, 2 bolts hold them on and if they are left loose they will rattle like that.
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Suggestion
Use a thin wood rod and push it on the places to check noises while holding one end next to your ear.
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All engine gurus, I need help.
While checking my parking spot today I heard the strangest sporadic metallic rattling from the passenger side of the engine. I could not really localize the sound (hoping it was from the cats maybe, and NOT the engine itself). It sounds ominous to me.
The car just had 2 new coil packs and 6 new spark plugs installed, and is otherwise running GREAT.
Here is the sound... you hear it right away (sounds like Im starting the car, but its just the weird sound), and then again at 9 seconds or so...
Engine Noise
Any help TRULY appreciated!
Sounds like something in the exhaust. Engine behaving normally otherwise?
If under warranty get to dealer and tech will put it in the air and check for any loose heat shields, exhaust pipes or catalytic converter rattles.
If coming from engine tech will use mech. stethescope to locate where engine noise coming from.
If not under warranty you'll either have take it to a shop or do the investigation yourself.
If engine not running normally I'd avoid starting engine cause it is something internal that could cause serious engine damage.
Sincerely,
Macster.
Understand that dealers will not replace them under warranty without a CEL thrown by the cats.
Anything above and beyond this is in the good graces of that particular service dept.
Did it make the noise before the work was done? I did not think so, take it back to the shop and have them check the bench for extra hardware or pull the intake and see what was left loose.
That rubber mallet on the cats would get results.
Theres a stethiscope method that would get you the area its coming from. Use a thin wood rod and push it on the places to check noises while holding one end next to your ear. Just don't let the fan belt put it through your skull. I'm not sure if some place sells the stethiscope with a rod on the end.
Check the heatshields for the coil packs, 2 bolts hold them on and if they are left loose they will rattle like that.
Also the tubular exhaust muffler brackets that techs sometimes loosen or remove to make the plug/coil access easier, if left loose they will rattle also.
Thanks to all of my "online mechanics"!!
It seems as if the consensus is an issue with either a loose heat shield (perhaps not
tightened after coil pack install), or an problem with one of the cats.
I will have it checked by my Indy asap. I needed front brake pads and an oil change anyway...
If it is one of the cats, and they are no longer in warranty (no cel), then it might be time for cat bypass pipes!!
Also check the 02 sensors; make sure one or has not backed out somehow. Otherwise, sounds like what others have already suggested: heat shield or loose tip perhaps
My original plan was to say I couldn't name that tune or band. But.......hey good luck getting to it. That sound isn't anything any of us would want to hear on our cars. Best of luck.
...update...
Well, I crawled around a little bit under the car and found a loose bolt that holds the exhaust can. After some contortionism, I was able to tighten it - but didn't have time to turn it on and listen...
I also rubber malleted the cats / exhaust etc - no sound... curiously, the OEM headers look more like the picture of the X51 headers... so thats cool (never paid attention before).
Hopefully this will be it.
- thanks for the input Tim!! Lol!!
Noise is GONE.
Hard to believe a bolt with 2 turns of play, could make that sound. Maybe a good time to bypass the cats anyway, you know, as a precaution...
thanks to all
