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Why is my engine making a loud rattling noise?
One common problem that will cause a rattle at idle is a failing hydraulic valve lifter. The lifters are small parts that open and close the engine valves, activated by oil (hydraulic) pressure. If you hear a “clack-clack” kind of rattle when you start your car’s engine, it could be a sign of piston slap.
Why is there a rattling scraping noise coming from my car?
The two most common causes of grinding noises under your car are worn brake linings or failing wheel or hub bearings. Whichever action creates the grinding noise is the affected system that needs repair.
How do I know if my crank bearing is bad?
You will know that it has become faulty when you experience symptoms of a bad crankshaft bearing that include knocking noises coming from the engine, metal shavings in the oil, low oil pressure, and crankshaft bearing noises.
Why does my car make a rattling noise when I start it?
The starter motor gets your engine started by cranking it. In the starter is a component called a Bendix, which connects it to the engine when starting it and disconnects the starter when it is done. The Bendix can be bad, preventing the starter from disengaging from the engine. This will make a rattling noise.
Why does the idler pulley make a squealing noise?
When the serpentine belt breaks, you have bigger problems to deal with. The engine might stall or overheat as a result. Plus, the squealing noise is going to become consistently louder, creating an annoying ride. The idler pulley and belt are located near the front of the engine.
What should I do if my exhaust is making a rattling noise?
Solution: Have your exhaust system checked by your mechanic or a muffler shop. The fix could be as easy as tightening a loose clamp or replacing a damaged rubber hanger. It’s also possible you might need to replace a section of rusted-out exhaust pipe or even the muffler. Either way, it’s a quick and easy fix.
Why is my car making a ticking noise?
Over time, the engine can consume, burn or leak oil. If the oil level gets too low, you can have a situation where the oil pump sucks air into it and the air gets pumped through the engine along with whatever oil is remaining. This can cause a rattling or ticking noise from within the engine.