When the engine is cold (morning start-ups) I hear what sounds like a single lifter ticking. It lasts about 4-5 minutes and goes away when the engine is up to operating temperature. Is this a hydraulic lifter problem? Has anyone else experienced this?

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1999 F-150 Lariat, 5.4, 3.55 Ratio, Deep Wedgewood/Gold, Tan Leather interior, LineX bedliner, NO DOOR CRACKS.

 

I experience it as well. Not sure either what it is. I have 2500miles on it and still does it since new.

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2000 F-150 Supercab 4x4, FLowmaster, Flowmaster DF40, Uniden CB, Canopy, BFG 32x10's Ko's, WHistler radar det, 3.55LS, 5.4liter, XLT, Red on Grey,

 

do you think it may be piston slap?

 

I have the same problem, It has been there since day 1. The dealer hasn't been able to figure it out but I'm dropping it off today for more tests.
The colder it is the louder it is. They said there have been a few reports of this. They say it souds like piston slap but wont admit thats what it is.They listen with there stethiscope and say it souds like its from near the cat converter but they have replaced them on others but it still knocks.I will keep you all up to date as things happen
2000 4x4 offroad
5.4 reg. cab

[This message has been edited by RWL (edited 09-24-2000).]

[This message has been edited by RWL (edited 09-25-2000).]