Question about 2005 Ford Mondeo ST
When the engine is cold no rattle, when warm hard accelerate no rattle, engine off load no ratlle back on the thottle rattle continueous, cannot pin point top or bottom of the engine the rattle is coming from
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Posted on Jan 02, 2017
possibly the bearings in the water pump,but that should have been replaced when the timing belt was done,because of the work involved
Posted on May 16, 2009
You problem is most likely just lifter noise. This is common with a lot of Ford engines with self adjusting lifters. Although lifter noise is bothersome it doesn't pose a serious problem. Unless your engine starts to miss or your gas mileage drops way off lifter noise is just an annoying problem.
I would recommend that you add some Sea Foam Engine Treatment($6-$8) to your oil. This is not an oil treatment it's more of an engine cleaner. If this works you'll need to add it every 2nd or 3rd oil change.
If this doesn't take care of the problem then depending on your engine you may have adjustable rockers that would allow you to remedy the problem. If not, your options are limited to living with it or replacing the lifters and possibly other valve train parts.
Posted on Jul 20, 2010
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