i have 2 4.6s f150 and crown vic"ex cruiser". both well over 100k. never a problem with block or heads. of course starters,alternators all the normal things that die after 100k.

 

My 2000 5.4 truck has had virtually nothing happen (knocked on wood) except some minor crapola.

A/C compressor was just replaced
IAC was replaced about 1.5 yrs ago
Thermostat went about 2 yrs ago, stuck open so no biggy

And that's about it, other than plugs PCV and routine cleaning of the t-body which falls under routine maintenance. To further the powertrain durability, both the tranny and rear end have had 1 seal each go, warrantied and no biggy again. And finally, everything else, the usual like blendor, rad(s), suspension (all tie rods were shot as well as both lower ball joints) has went but all in all not big deals thank God!

 

1999 F-150 XLT Supercab - traded in with 94k miles - only regular PM, IAC Valve at 87k, and a tune up at 90k for the engine.

2007 F-150 FX4 Supercrew - 3,500 miles, not a single problem.

 

05 KR SCREW,5.4 l 3v engine(I'm changing the plugs);29,690 miles.
No problems!

 

313,000 miles on my trucks original internally untouched engine and trans. Actually there's probably an additional 5000+ miles since the tires were oversized for about 100,000 miles. No interal issues ever. The alterator bearings have been noisey and replaced twice. 2 o2's have been changed. Outter Y-pipe studs rotted through were burned out and replaced. The reamost manifold studs are broken off, and it ticks until the manifolds get hot. The EGR passage plugged up and needed cleaned. It does have a little piston slap when cold and uses about a quart of oil every 1100 miles, but I don't see it quiting anytime soon. Gas mileage is usually about 15/19. Great engine and the rest of truck ain't bad.

 

I can say that my truck still has the OEM alternator. Starter was replaced a year ago.

 

Never had problems with my 2002 (purchased Oct 5th 2001) 4.6L (sold Jan 07)

So far no problems with my new 2006 purcahsed Jan 07 with just over 10,000 miles on it now.

-Brian

 

2007 5.4 with 580 miles and NO PROBLEMS! I did trade in a 97 F-150 4.6 with 142,000 and no problems at all except the usual things like alternator, plugs, wires. It even had the original water pump. It ran like a champ but I needed the bigger motor to tow my TT so that's why I got the 2007.

 

My 1999 with the 4.6 had no problems whatsoever when I sold it with 120K on it. Original everything on the motor besides filters, plugs, and wires.

 

85,000 on my 5.4 and runs great!!!Tune up and IAC valve

 

I got my truck with 33,000 miles on it. 66,832 on the clock and the only thing was a battery went dead. Now the funny thing is it was 14 days after my wifes battery went dead...............

 

A wife with a dead battery is not a good thing..........

 

1997 f150 xlt 4.6L 168,000 runs great uses almost no oil between changes

Engine reapairs - replaced the fuel pump and he TPS

replaced 2-3 accumulator piston on the trans mission

dealer replaced instrument cluster at 75,000 miles - made the appointment 1 week before the warranty ran out

not to bad after 10 years of ownership- one hell of a lot less money spent keeping it running than my previous truck- 87 toyota 4wd. toyotas are way overrated.

 

68k and nothing wrong.

*Idler pulley was squeeking and I replaced but not enough to count IMO*

 

I've never had an engine problem on a Ford V8 - three 5.0 Mustangs and two F-150s. Hundreds of thousands of miles. I guess that is why I prefer Fords.