I just bought a 2004 Lariat F150 4X4 150000k it did have camphazer ratttle id the seafoam treament then did oil change and filter put in mobile 1 5w40 100% synthetic oil and Ford filter now theres not a hint of rattle from the cam phazer
Buy the way i only payed 8500 for it

 

what is seafoam?

 

I would recomend stickin with 5w 20.

 

i been reading on here that alot of guys run 5w40 in there 5.4 tritons with cam phazer prob. As they said it will run alot quiter as it does

Seafoam is a internal motor cleaner
do a search for it here theres a good how to on it

 

whats the risk with running 5w40 instead of 5w20... mine rattle and shutting them up would be nice i just cant afford it breaking down

 

nothing really, 5w20 is the range it is good for, so 5w40 covers a wider spread of oil viscosity

 

different oil pressure
wearing of tight tolerances (not immediate, but a looooong time consequence if you use the higher viscosity oil 100% of the time)

 

thats what i thought... i'm debating doing it until i get my cam phasers fixed just to shut it up a bit as its really annoying

 

Did you put the seeafoam in the oil, gas or vacuum line? I would like to do it to mine but a bit nervous. I hate the cam phazer noise plus I have 90k on the truck and its time for some tune ups.

 

maybee this is a stupid question but what else can wear out besides the cam phasers, if there already gone what is the danger of thicker oil to help getting a bit more mileage