Question about 2003 Ford Focus
Possably a bad pulley on the front of the engine, but also possable you never change the oil in it and the engine is about to blow.
I would take the belt(s) off and spin the pulleys to look for a bad bearing. if you don't find one, start the engine but DO NOT LET IT RUN FOR MORE THAN 30 SECONDS WITHOUT THE BELT to see if it makes the noise without the belt.
if it still makes noise, then the Timing belt should be removed to inspect the Water Pump as well as the Timing belt pullies for bearing wear.
If you are leaking antifreeze it's likely the water pump.
*( timing belt should only be removed or replaced by a profesional, seveare engine damage can occure if done incorrectly)*
Posted on Oct 23, 2013
Not sure of starting problem, but you may have bad engine mounts causing the vibration/roaring noise. hav ethe engine mounts check. These vehicles have a history of bad mounts especially after 100K miles or more.
Posted on Oct 23, 2013
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Posted on Jan 02, 2017
Most likely it's a wheel bearing going out.., If you turn to the right, or the left when driving the noise will change pitch. Been there done that.....
Posted on Feb 01, 2009
the idle air bypass valve is making noise and resonating through the air inlet the valve needs to be replaced there is also a revised hose to the valve to reduce noise if it hasn't already been replaced
Posted on Jun 16, 2009
I certainly would take it back to the shop that performed the brake job and have them investigate. If it was not making the noise prior to the repair there is a good chance the noise is involved with the brakes. A possible loose brake pad, a sticking caliper(caliper pins may need to be lubed) or any number of things could be wrong.
Posted on Jul 04, 2009
My sons explorer had a similar problem. beleive it ior not, it was the shakles, they were severely wroughted, I changed them and the vibration is gone.
Take a look, it may help
Posted on Jun 07, 2010
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