Rocker arm issue?

[amb82]

Here is a little back ground on my situation first. I just sold my 09 and had every intention in buying a 2012. After reading more more about the lack of power tuned I changed my mind for now. My buddy was in a bind financially and sold me his 08 for real cheap. It has 56,000 miles and is bone stock. Has been stock all its life. I have no experience with a stock 6.4 as mine have always been tuned the day after purchasing them. So I am not sure what is normal as far as engine sounds go in stock form. Here is the deal. At idle there seems to be a different sound on the passenger side of the engine. I would call it a very light thumping. It almost sounds like a deep exhaust tone from a gasser. You wouldn't be able to hear with the hood down unless you knew what to listen for. It is noticeable to me with the hood up and changes tones when I open and close the air filter lids. I have searched about the noise and it usually points to a rocker arm. I listened to a few sound clips online of trucks with the issue. The sound clips online were very noticeable in the video even with the hood down. I took a video of mine to compare. Mine sounds almost normal on video. Is this a cause for concern?


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[SCUFFY828]

i believe id just keep my eye on it for a bit and see if noise gets worse

[amb82]

Yeah I will probably do that but I am just ready to tune this thing but don't want to have to strip everything off if I have to go to the dealer


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[SCUFFY828]

true , take it to them and just let them check it ,only thing would be if they didnt find anything wrong , they would want to charge you the time

[amb82]

I did check it for codes and nothing. I am sure if it would throw a code though for a broken or damaged arm


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[SCUFFY828]

yeah and make quite a bit of noise

[Term3]

If its a bad rocker, bent push rod or a bad lifter I personally would get it checked out ASAP as you are taking a chance of a valve contacting a piston and that will turn this good deal on a truck into a very lousy one.

[amb82]

I would think this would be covered under warranty? 08 with 56k miles. And everything sounds normal inside the cab


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[Term3]

Not sure and if it is warranty covered is the warranty valid for you since your not the original owner? Maybe someone can chime in that knows for sure.

[amb82]

I would think the ford factory warranty is transferrable but not sure. If its not covered I def won't be taking to the dealer to have them diagnose it or work on it


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