heinzinator

I have a '99 XLS 4.0 and there is a rattling/tinging noise coming from somewhere around the serpentine belt tensioner. Not so much when it's idling but when I rev it, it is very noticeable. I thought it coulda been the tensioner itself cuz it looks rather wobbly, but when I removed the belt and started it up it was still there. Almost sounds as if a loose hose clamp is spinning around. Any ideas on what it could be?

Bert

Doing it with the belt off indicates somthing inside the engine. Maybe the timing chain or tensioner.

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Bert

360ci

Check all the bolts.

I had a bad rattling sound that got worse on my Sprinter 3500 the other day! Turned out to be a loose/stripped bolt. There were 4 (two fixed and two adjustable), and this one bolt in particular was replaced previously as there were NO washers installed in it to absorb vibration so it was only a matter of time before it became a problem.

As you removed the belt, that rules out some of the accessory drives as well as the idler pulley as the source of the noise. If you can, get under the vehicle and check EVERYTHING you can see, touch, etc to make sure nothings rubbing against something it shouldn't.

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'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!