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Old 08-12-2012, 07:53 PM
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4.7 loud engine noise

so yea when i start up my jeep i get a loud noise that comes from the engine. once it gets warm or i start driving it goes away. i cant figure it out. could it be lack of oil pressure building up or could it be the timing chain. it sounds bad. its my second engine in the truck cause the first got hydralocked its a 05 limited by the way
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Old 08-12-2012, 09:51 PM
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Re: 4.7 loud engine noise

very common for the 4.7 there is nothing wrong, it is just annoying
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Old 08-12-2012, 10:11 PM
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Re: 4.7 loud engine noise

its very loud is there anything i can do to fix this its just it makes it sound like a pos. when it comes to my truck im very very ocd
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Old 08-12-2012, 11:17 PM
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Re: 4.7 loud engine noise

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Originally Posted by inferno red wk View Post
its very loud is there anything i can do to fix this its just it makes it sound like a pos. when it comes to my truck im very very ocd
i know, mine does it too. there is really nothing that can be done. its very wierd because it doesnt even do it everytime
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Old 08-13-2012, 06:27 AM
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Re: 4.7 loud engine noise

i think i know what sound youre talking about. im sitting at just over 90k- in the past week and some change i had my plugs done, oil changed with full synthetic, etc... it still makes a noise that sounds like a lifter/piston slap/tapping. goes away after start up but upon start up it takes a minute for it to go away.

im thinking its normal.
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Old 08-13-2012, 12:09 PM
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Re: 4.7 loud engine noise

Mine sucks in air like crazy when I start it up every morning. Only noticed it when I put intake on it. Goes away as well. Wouldn't worry about it. I assume this is the noise you're hearing.
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Old 08-13-2012, 12:26 PM
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Re: 4.7 loud engine noise

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Originally Posted by Kayak83 View Post
Mine sucks in air like crazy when I start it up every morning. Only noticed it when I put intake on it. Goes away as well. Wouldn't worry about it. I assume this is the noise you're hearing.
i hear ya.. mines loud as hell in the AM too.
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Old 08-13-2012, 01:33 PM
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Re: 4.7 loud engine noise

lol! After installing the K&N and 3" exhaust my 4.7 sucks air like a jet untill it "chokes down" funny part is that it seems to keep sucking air half second after i turn off the engine!
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Old 08-13-2012, 02:31 PM
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Re: 4.7 loud engine noise

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Originally Posted by vinnie2001 View Post
lol! After installing the K&N and 3" exhaust my 4.7 sucks air like a jet untill it "chokes down" funny part is that it seems to keep sucking air half second after i turn off the engine!
same here... looking at your sig you have prettty much the same mods i have, with the exception of my fastman throttle body. LOL. the intake cracks me up with the amount of noise it makes
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Old 08-13-2012, 08:58 PM
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Re: 4.7 loud engine noise

i know RIGHT! so i've been thinking about doing somthing w/my TB... what size did you install and did you happy w/it?? did it impact your mpgs much?
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Old 08-14-2012, 03:31 PM
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Re: 4.7 loud engine noise

it cant be normal. i just does not sound it. i am determind to find out what it is.
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Old 08-14-2012, 04:06 PM
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Re: 4.7 loud engine noise

Definitely normal. I get it maybe once a month and it sounds like a B52!
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