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Subject: F150 clatter/new wrinkle

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lonestarjeff    Posted 12-05-2018 at 22:53:25 [URL] [DELETE]        [Reply] [Email]  
  • F150 clatter/new wrinkle
  • Still haven't nailed down exactly what's going on. The clatter noise has now stopped happening as I drive on side streets, the alley, or other low speed roads. Hot or cold, no noise. The only time I hear it now is at highway speed, & only when I accelerate(sounds alot like pre-ignition).

    No idea if this next wrinkle is related or not, but if not it's quite a coincidence. I noticed this morning a wet black sooty spot on the driveway right under where my tailpipe exits the truck. Then I noticed the pipe had the same on the rim.

    This lead me to check the PCV valve, which was packed solid & the hose collapsed. I replaced both this evening, so we'll see tomorrow.

    steveVa    Posted 12-07-2018 at 02:00:09 [URL] [DELETE]        [Reply] [No Email]  
  • Re: F150 clatter/new wrinkle
  • Condensation increases in colder weather and seems to be cleaning out your exhaust system as we move into winter. This seems to be more evident in a truck that is not driven every day. One thing that this does bring to mind is carbon buildup. I have heard of a piece of carbon buildup breaking off and hitting a valve causing some chatter. It eventually burns up, or some folks do the SeaFoam thing.
    A timing chain redo would be a good bet if you have over 200k. Good
    luck.

    Walt/Tx    Posted 12-06-2018 at 11:05:14 [URL] [DELETE]        [Reply] [No Email]  
  • Re: F150 clatter/new wrinkle
  • I had the 4.6 triton V8 in my 98 and it did that plus a puff of blue smoke on cold start. I was told it was worn valve guides. I traded at 220k miles. It was lowest maintenance cost truck Iíve had.

    lonestarjeff    Posted 12-06-2018 at 21:17:02 [URL] [DELETE]        [Reply] [Email]  
  • Re: F150 clatter/new wrinkle
  • Hey Walt....220k must the magic number for the 4.6! My 2000 is just over 225k, LOL.
    No complaints on this truck either, in fact I'm considering doing the timing chain kit replacement myself unless I read up & find a hurdle I'm not ready to jump.

    Bruce(OR)    Posted 12-06-2018 at 01:36:35 [URL] [DELETE]        [Reply] [No Email]  
  • Re: F150 clatter/new wrinkle
  • The leak from your tailpipe is a natural byproduct of the combustion process of the internal combustion engine. It's called water. Water generally turns to steam and you never see it as it exits your tail pipe with a heated engine. If you look at the bottom rear of your muffler, you might see a small hole, about 1/8 inch, in the bottom of it. That is also to allow water to drain and prolongs muffler life.
    With a cold engine, seeing water dripping out the tail pipe is not out of the norm and at certain ambient temperatures is more evident.
    As for your 'spark knock' engine noise, as I posted the link, chances are your timing chain components are going away. I just retired as a fleet mechanic and we had a few 4.0 Fords with the same engine noise problems. Thinking of how many in the local fleet? My bad memory recalls about 100 of them. 150 at the most, I believe.
    The problem with those being that Ford said that 8 PSI oil pressure at idle is an acceptable number. Perhaps a bit low for a new engine, than add a few thousand miles and I don't believe the engine will maintain the 8 PSI pressure standard.
    Your 5.4 rattle might be different, but then again...?

    lonestarjeff    Posted 12-06-2018 at 21:24:28 [URL] [DELETE]        [Reply] [Email]  
  • Re: F150 clatter/new wrinkle
  • The tailpipe discharge was definitely not the usual water vapor. This was an oily mix, but hopefully that was from the clogged PCV.

    I wish you were wrong about the timing chain components, but everything seems to be pointing that way. Getting set to order a kit.

    Bruce(OR)    Posted 12-07-2018 at 14:43:47 [URL] [DELETE]        [Reply] [No Email]  
  • Re: F150 clatter/new wrinkle
  • Rockauto.com might be worth a look.

    lonestarjeff    Posted 12-07-2018 at 17:09:39 [URL] [DELETE]        [Reply] [Email]  
  • Re: F150 clatter/new wrinkle
  • LOL I went there earlier this week. Trying to decide between Cloyes or Melling.

    Bruce(OR)    Posted 12-08-2018 at 01:19:51 [URL] [DELETE]        [Reply] [No Email]  
  • Re: F150 clatter/new wrinkle
  • I have done both and not found a problem with either. Go cheap and walk home is my best advice, however, foolishly wasting money on the name brand might be a modern day made in china mistake. AC Delco/ Delco Remy comes to mind very quickly.

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