5.4L SOHC 24-valve SMFI Triton V8 engine

[fekbmax]

Are these engines any good at 200,000 miles ?

[shady]

I could have gave you an answer yesterday.

[e philpott]

It's gas and uses 3 Valve per cylinder, they seem to be durable if maintained properly , common problems are exhaust manifold bolts busting off in the manifold causing exhaust leak , problems from lack of maintenance are timing chains (2 required ) guides and tensionors ( 2 required of each )

[WConley]

Yes to the above issues- and don't forget the problem with the spark plugs seizing in the aluminum heads and tearing out the threads.  That said, the 5.4L 3-valve can be quite durable if maintained properly.

No, it's not a diesel.  It most certainly does not have diesel low-end torque either, but it makes OK power in an F-150.

http://www.expertswrite.net/ford-5-4l-triton-3valve/common-problems.html

[shady]

Well, if it isn't an April fools joke, make sure it has new spark plugs. You don't want to have to change them.

[e philpott]

The Factory plugs are the ones that break off , it actually breaks the lower casing that has the ground electrode from the spark plug due to carbon build up , threads are usually OK but it takes a tool to get the stuck piece out , aftermarket plugs don't seem to be a issue

[fekbmax]

Sorry , my bad on the diesel.  The fricking ad didn't go with the truck.

[FishCakes428]

I'm having a problem with a pretty bad oil leak now at 155,000 miles. Apparently Ford was/is aware of it. Burrs left on the deck surface after block machining interfering or compromising the gasket surrounding the oil ports. Or something like that. Oil leaking from head gasket passenger side rear and drivers side front. Pressurized oil ports from deck to head leaking out pretty bad. They have a revised head gasket that has the embossed areas slightly relocated. Gives the new gasket "fresh meat" deck surfaces to seal against. Original OEM gasket embossing can brinnel (?) into the deck surfaces. I have a 2001 5.4 with the PI heads. Limited years though. Course I have the bullseye year. And to boot, it's in an E-350! Engine under the dash.  Don't know what year you have. Search it out on the web and you'll get plenty of references to the problem.

Pop the dog house and take a look. Not hard to spot seeping or leaking on passenger side.