I have a knock in my engine, its not really loud but it kind of sounds like a quite diesel rattling haha. i know its not good, just wondering if yall would have any tips or advice to help get rid of it.

 

Is it knocking when it is cold, under load, idle, a bit more info would help.

If it knock when it is cold, that is fairl common, it is actually the piston head having shrunk ever-so-slightly and knocking inside the cylinder walls.

When its under load, it is a gas quality issue, prob the same for idle.

 

yeah it only does it idle. so put some premium and a fuel addative in it?

 

that could be your first step. Then go from there.

 

alrighty, thanks

 

If that doesnt stop it, check the cams. I've had it sitting at an Idol, and it'd be a consistant knock. Ended up one of my cams wasnt getting properly oiled. But it sounded like a diesel, so it was cool. Till people laughed at me. So if all else fails, check that.

 

No, knocking at idle is not a fuel quality issue.

Which engine?

 

5.4l

 

Cam phasers?

 

The first step would be try and locate the noise. Get a mechanics stethescope, a piece of rubber hose, or a large screwdriver to use as a listening device. Use one of these against your ear and move the opposite end around touching various parts of the engine (cyl heads, front cover, oil pan, etc.) Try and locate where the noise is the loudest. If you have a rod bearing going try removing the injector wire on each cyl (one at a time replacing each before removing the next) while the engine is idling. The noise should deminish/change when the injector connection is disconnected from the bad cyl. Basicly you are changing the load on that cyl. A diesel noise could be a loose cam bolt at the front of the cam cover so check there, it could be the VCT as well which is also at the front of the cam covers. You may even try removing the serpentine belt and start the engine. If the noise goes away it could be one of FEAD components, P/S, A/C, Alt, you get the picture. Good luck.