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-   -   4.7 loud engine noise (http://www.jeepgarage.org/f181/4-7-loud-engine-noise-45993.html)

inferno red wk 08-12-2012 07:53 PM

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

SvenskaJeepGuy 08-12-2012 09:51 PM

Re: 4.7 loud engine noise
 
very common for the 4.7 there is nothing wrong, it is just annoying

inferno red wk 08-12-2012 10:11 PM

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

SvenskaJeepGuy 08-12-2012 11:17 PM

Re: 4.7 loud engine noise
 
Quote:

Originally Posted by inferno red wk (Post 669592)
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

paroxysym 08-13-2012 06:27 AM

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.

Kayak83 08-13-2012 12:09 PM

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.

paroxysym 08-13-2012 12:26 PM

Re: 4.7 loud engine noise
 
Quote:

Originally Posted by Kayak83 (Post 669853)
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. :thumbsup:

vinnie2001 08-13-2012 01:33 PM

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!

paroxysym 08-13-2012 02:31 PM

Re: 4.7 loud engine noise
 
Quote:

Originally Posted by vinnie2001 (Post 669889)
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

vinnie2001 08-13-2012 08:58 PM

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?

inferno red wk 08-14-2012 03:31 PM

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.

StoneCold 08-14-2012 04:06 PM

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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