Question about 2001 Harley Davidson FLHRCI Road King Classic

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Rattling noise top end of engine

01 roadking classic with a pumped up motor just changed oil to screaming eagle synthetic is it the cause????

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The first thing I would do is change the oil and clean the screen. I would use a lighter oil for the winter (10w40) if your bike uses it. Running some "seafoam" in the tank wouldn't hurt and making sure your gas is the proper octane
cam chain would make more of a slapping noise so it may be a sticky lifter. While I don't use SeaFoam in my "oil" the directions states that you can use for about 100 miles prior to an oil change to clean out carbon and gum inside the engine. That would be a personal call so you'll have to decide if you want to do that. I use Seafoam in the gas...just never have put it in the oil yet. Also...some use Marvel Mystery Oil and claim it helps clear up sticky lifters. If you use either product be sure to follow the directions carefully.
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Posted on May 17, 2009

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That squealing noise can be caused by an incorrectly tensioned belt, or a worn belt. Replacement is the only option.

The other frightening sounds can best be described as 'rattles' or 'tapping'. When a car stands overnight all the oil drains back into the sump (oil/pan).

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A 'bottom end tapping' is a symptom of worn big ends (they are bearings at the bottom of the piston and fit around the crankshaft).

2. A rattle/tapping from the top of the engine can either be a worn camshaft or 'lazy tappets'. Again, when the engine warms and oil gets to the camshaft and tappets (also called 'hydraulic lifters) the noise will disappear.

If your car has this rattling/tapping noise - identify whether it is coming from just under the rocker box (ie the camshaft/tappets..) or the bottom end of the engine (big end bearings).

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A bottom end tap/rattle (or 'knock') - the sooner that is sorted out the better.

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