steve392

I didn't notice this till a raptor owner brought it to my attention a few months ago when he asked me if I had this whining noise after I shut off my engine. I said i didnt or atleast I didnt think i did. When I shut off the truck sure as **** there it was. It last's maybe a second or 2 more then the actual engine running and it is definitely something rotating. It sounds more like a whistle then a whine. Im going to try and get it recorded so people understand what I mean. Also, this is going to sound absolutely crazy. But while going through a short tunnel and under acceleration I heard a loud whistling coming from the engine, similar to the whistle of a turbo and it changed pitch as I gave it gas or let off the pedal. Now i have no clue if the 2 noises are related or not.
Lastly i've started to experience an antifreeze odor coming from the engine at idle. I've checked all hoses, hose connections, reservoir and cap and cannot find any leaks whatsoever. I've never had this issue since owning with 4 miles on it, 24k on it now.

Truck is a 2014 f150 5.0.

Tothemax

Have you taken it to the dealer for these issues?

steve392

Not yet. The whine I wanted to see if it was something that I could take care of myself first.

jdinner

Alternator! The drive pulley is a one way clutch. If you rev it, shut it off and walk to the alternator you can still see it spinning.

mechanicboy

More like a whistle or a whine, sounds like vacuum bleeding off.

steve392

and of course since posting about it, i can't get it on video.

gDMJoe

Radiator cooling fans (?). *Though they usually spin-down soon after the ignition is turned-off.
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