5.4l chugging/knocking/tapping when cold

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Oct 16, 2010 | 09:15 PM

soundwave

Thread Starter

Laughing Gas

Joined: Nov 2005

Posts: 983

Likes: 3

From: Detroit 'burbs

5.4l chugging/knocking/tapping when cold

I posted about this back when I bought it back in Feb. and I thought the problem worked itself out but its back. When the tempature drops below 55 degrees or so, comming from the passenger side of the engine there is a chugging or knocking sound, more so when RPMs are high.

I had no issues with it all summer, but now that the tempature is dropping I noticed its back. Is this something I should worry about? What could be causing this? I had the same engine in my 07 and it never did this. Thanks for all help in advance!

Oct 16, 2010 | 11:35 PM

94MustangGT

Laughing Gas

Joined: Jan 2008

Posts: 751

Likes: 0

From: NC

Possible exhaust leak on the passenger side? Does it go away as the motor warms up?

Oct 17, 2010 | 08:13 AM

D8chumley

Resident smarta$$

Joined: Aug 2006

Posts: 4,929

Likes: 9

From: Oaks,PA

Take it back to the dealer and let them figure it out. Thats what warranty is for, right?

Oct 17, 2010 | 02:51 PM

soundwave

Thread Starter

Laughing Gas

Joined: Nov 2005

Posts: 983

Likes: 3

From: Detroit 'burbs

Yes it does go away when it warms up. And I should take it back I just hate sitting in the dealer all day and my luck it'll be when the enigine is warmed up and it wont do it for them

Oct 17, 2010 | 05:19 PM

juneau76

Cargo Master

Joined: Sep 2007

Posts: 3,049

Likes: 1

Quote:

Originally Posted by soundwave

Yes it does go away when it warms up. And I should take it back I just hate sitting in the dealer all day and my luck it'll be when the enigine is warmed up and it wont do it for them

I agree with you on this. It sounds like a nice sleepover for your truck at the dealership may be the way to go. Be there in the morning for when it gets started the first time to listen and identify the noise for them.

Oct 17, 2010 | 07:50 PM

347stang

Junior User

Joined: Mar 2008

Posts: 52

Likes: 0

From: Ontario Canada

I was wondering how many miles/Kilo you had on the truck when you first started hearing the noise. I bought my 2010 F150 in August and as it gets cold i hear a similar noise, but the noise is sometimes there even after a good run. I drove to my buddy's to have him listen to the engine but you guessed it, it wasn't making the knock. think if it happens again i'll take it in, oil change needs to be done soon anyway. If anybody has any ideas what it could be let me know. If I were to describe it I would say it's the bottom end knocking.

Thx

Oct 17, 2010 | 08:11 PM

soundwave

Thread Starter

Laughing Gas

Joined: Nov 2005

Posts: 983

Likes: 3

From: Detroit 'burbs

Mine started within the first 1,000 miles, and Im about to hit the 8,000mile mark. Again it seems like its only when the engine is cold, 50 or so degrees or less