Hey all,
My daughters 2004 f150 5.4 3v. 130k miles. Had a broken timing chain guide on passenger side. Changed phasers, solenoids, timing chains, crank gear, tensioners, and oil pump. Pulled pan and cleaned it and the pickup tube of pieces of the old guide. Engine had zero sludge. Very clean inside.

Put it all back together. Left crank sensor unplugged to rotate engine until it had good oil pressure which only took a few seconds. Plugged sensor back in. Truck started right up. Runs perfect. Drove perfect. Idles with no noise. But as soon as I rev it up a little, there is a HORRENDOUS squealing from the lower left of the engine. Pulled serpentine belt and squealing is still there. Used a stethoscope to determine its in the lower left behind the timing cover.

I haven't pulled the cover back off yet but any ideas what this could be? Everything went back together fine so I can't imagine what it is.

HOWEVER, I did notice that my new tensioners only had an oil hole in one of them. The two I removed both had an oil hole. So one of the new tensioners does not have an oil hole in the center of the plunger. I see online, that many did not come with an oil hole. But I'm wondering if this could be the source of the squealing? Maybe not oiling the chain enough and the squeal that I hear is the chain on the plastic guide?
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Any thoughts or suggestions would be greatly appreciated!

thanks!

 

Is it a squeal like a dry bearing squealing?

 

wonder if the tone ring was installed backwards. just thinking out loud.

 

If you change oil pump, pre load oil filter and pump with oil . Hold pedal to floor to stop it from starting and try it six or so times to get it to get a little flow going . Forget about it bringing up oil pressure gauge, it won't happen .
If there isn't a hole in tensioners like the ones you removed I would think something very wrong but I don't remember looking at mine that close . I would use the old style metal ratcheting type anyway . They are still available and several outfits still supply them , melling for one ,you can buy them on amazon .