What's That Sound?

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I just got back from 3+ weeks in sunny Huntington Beach and the whole time I was gone this issue was on my mind. I got a cheap stethoscope from Amazon and when I got home today fired up the car and started sticking it where I thought it was coming from. Nothing in the valve train that I can hear. I stuck it to the manifold, nothing. Heads, nothing. But I can hear it...so I stuck it to the distributor and bingo! I pulled off the cap and see dust from the rotor scraping the cap. The DUI dizzy I have doesn't fit very well under the wiper motor and was slightly askew. I had a new cap and rotor so I put them on, removed the wiper motor and had to dimple the firewall a tick to get one plug wire to fit properly but it solved the problem completely. I can't figure out why the knock/tick/tap didn't stop at some point with wear, or why it just started out of the blue, but it is gone.
 
AJ/FormS said:
Wow, I shouldda thought of that, cuz it happened to me once too, and now that I think of it; it made that same sound.
Good on you for finding it and reporting back
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At our age remembering to go potty is a big plus, let alone think of stuff that happened years ago.
 
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