Forrest16

When I crank my truck it gives a rattle for a couple seconds then goes away. It's a 5.4 screw 4x4. Thought it might be something to do with exhaust but not sure. I can hear a noise that sounds like exhaust leak when drive by buildings but like I said the rattle only happens on cold start up. It makes a faint tick noise when idle. Any kind of insight would be appreciated as I have heard so much about the cam phasers but the truck seems to run fine other than start-up noise by the way it has 100k miles on it and spark slugs have not been replaced just yet. Thanks

goldteam

this is very common for the triton 5.4, there are a few things i know of which is the crank shaft and the valves hitting the aluminum heads. my buddys 2004 5.4 lariat does it (135k miles)

MOTOunplugged

Mine does the same thing. 135k

metalplatesrule

Mine does it too, 04 Scab 92,000mi

fend2ride

Exhaust manifold

greenhornet

i had a similar problem about 2 weeks ago. it made the same tick noise only when it was cold or wet and i wasnt sure what it was. it ended up being the serpentine belt and i had to replace it along with 3 of the pulleys. was about $360 worth of parts and labor.

domoniquegabby

Mine was doing the same thing also. Turns out it was a leak from the collector to the manifold. The studs needed to be replaced. 50.00 repair at local Muffler shop. 05 fx4 150,000 miles

Forrest16

Thanks everybody for the input going to test out a couple of the ideas that i can and see if i can get it to quiet down.

greenhornet

yeah seems like you have a couple of things to test now. best of luck.