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ratling sound coming from the engine bay when i hit 5000 rpm

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Old 10-09-2007, 11:40 PM
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Exclamation ratling sound coming from the engine bay when i hit 5000 rpm

ratling sound when i hit about 5000 rpm on any gear, comes from the engine bay, mechanic said it came from the valve covers, could i have a loose rocker? input guys, after the fast intake install, i noticed this at 5000 rpm, didnt do it before, what do u guys think it is
Old 10-10-2007, 11:29 AM
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If it was a rocker, you would probably hear it at any RPM. Is it a rattle, or the detonation tick that you get from the PCV oil in intake issues?
Old 10-10-2007, 01:09 PM
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Are you sure its not ping? That sounds like a rattle.
Old 10-10-2007, 01:34 PM
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If it sounds like marbles in a coffee can it's most likely detonation. You are prbably running lean now that you have the intake on it.
Old 10-10-2007, 07:39 PM
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well my mechanic called me and he said that theres a loose vavle spring i think he said #5, hes gonna check if its weak and needs replacement or just adjustment thnx guys for ur help, im glad nothing broke off inside the engine
Old 10-11-2007, 11:01 AM
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Keep us posted!
Old 10-12-2007, 09:53 PM
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ok guys now im scared, cause on thursday the mechanic went to a doctors meeting, and on friday today, he went on to medical leave, so the owner of the shop was there but hes not a mechanic, i asked him about my car and he said hell look up my file and call me back, then he calls me back and says that he sees a quote of 1300 dollars, and im like what, they told me that it was a valve spring, and he told me to not take it to the heart cause he dosnt know what is the deal, basicaly i spent 710 dollars for a brand new maf a tps sensor and a new starter with labor, and they said the prob was fixed, so when i go, i pay, then i take the car out to go home, well i go to about 5000 rpm and guess what the ratling sound is there or clicking sound whatever u wanna call it, so i go back and tell him, he sayd ur kidding right, so he gets in the car with me and heres the noise, so after we get off, he tells me that he wont charge me labor for the work for what the problem is, that was on tuesday, wednesday he calls me and says they found the prob, he says its a weak or broken or whatever valve spring, on thursday hes out for doctors, and friday hes out on medical leave, now there is more mechanics there, but im afraid that they found something else, and might have to tear into the engine, anyways, after telling me its something now its a 1200 dollar thing, but i just spent 710 on somthing that didnt fix my prob, what should i do?
Old 10-12-2007, 11:38 PM
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Originally Posted by nrmustang
If it was a rocker, you would probably hear it at any RPM. Is it a rattle, or the detonation tick that you get from the PCV oil in intake issues?


well i did the ls6 pcv conversion as well
Old 10-13-2007, 12:06 AM
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Originally Posted by GuitsBoy
Are you sure its not ping? That sounds like a rattle.


one thing i forgot to mention, when i was takingoff the knock sensors the knock sensor connecto broke,and since gm didnt have the connector i jsut used the red rtv sealant to hold it in place,
if it is a ping how do i deal with it, and how do i find out if it is a ping?




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