2002 Ford FX4 4.6L engine. Buy or pass and why?
2002 Ford FX4 4.6L engine… Buy or pass and why?
As usual Robert is wrong again. The 2 valve 4.6L didn't have a spark plug design problem. The 2004+ 3 valve 4.6L and 5.4L had the two piece spark plugs that would break in half. This truck has a the 2 valve 4.6L. Now with that said, the early 4.6L 2 valve engines did have a problem with spark plug ejection, this is not a design fault with the spark plug, but rather the cylinder heads not having enough threads. The 1999-up P.I. Cylinder heads partially resolved this problem, but it's still been known to crop up from time to time. Fortunately have helicoil inserts fitted will correct this problem should it happen.
Moving on
"ONLY MOBIL ONE 0W-30 oil "
Robert should know Ford specs 5W-20 oil for this engine
"NO VALVOLINE EVER "
There's nothing inherently wrong with Valvoline
"NO PRE$STONE EVER! Only genuine FORD factory coolant"
Again there's nothing wrong with Prestone either, you can use whatever green colored coolant you chose, this truck doesn't require any kind of proprietary or exotic antifreeze.
In theory it is a GREAT truck and engine! Have a FORD GUY look it over for you first! The 4.6 had issues with SPARK PLUG designs and ONLY A FORD dealership should play with it! If THEY screw up, they will NOT CHARGE YOU! There was a recall on this! Ford designed a special PLUG REMOVAL tool for it! If the WRONG people work on it, the PLUGS can strip and cost you 2k in repairs! The engine basics are EXCELLENT and DURABLE! Get a PRE=-BUY check up first! GOODLUCK! Use ONLY MOBIL ONE 0W-30 oil and have the IDLE AIR CONTROL VALVE removed and cleaned up! NO VALVOLINE EVER and NO PRE$STONE EVER! Only genuine FORD factory coolant, Please! BYE NOW!
Without more details regarding mileage and maintenance history its difficult to say… But as far as the engines go, they're durable and dependable. The one knock on the early versions was the small number of threads in the sparkplug sockets of the aluminum heads led to many plugs being ejected. Never an issue if the proper torque was used to install but many found out the hard way. Otherwise overall good engines.
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