Plymouth Neon Engine Rattle

EDIT/UPDATE: Apparently, the noise is the water pump. It wasn't displaying any of the classic signs of water pump failure, so that never even occurred to me. But eventually the pump seized and shredded the timing belt. Replaced those bits, and it's back to normal, sounding great (or, as great as a Neon can sound, anyway). Thanks to everyone who replied to this with ideas! Anyone have any idea what this noise might be? This video is documenting an odd rattle that is apparently coming from the bottom-end of the engine. It's a 2L SOHC four cylinder. No idea what's making the noise, but it doesn't seem to affect drivability any, nor does it raise the temperature or muck with the oil pressure.

More Videos...

Putting Seafoam into the Engine. Dodge Neon
Putting a can of seafoam down the brake Booster line to seafoam the Neon. I do this about ever 12000 miles, and it really gets a lot of carbon out.

Dodge Neon noise

2005 Dodge Neon horrible noise accelerating
My car started making this terrible noise about 2 weeks ago. When it first started, I went to get my oil changed after not doing so for the past year....I know....the guy who changed it said it was just sludge now so he flushed it and put new oil in. Since then though, it has gotten worse. It's like a grinding/thrumming noise. It will mainly make the noise when I accelerate though now it happens when I'm idling at a stop light. It doesn't do it when I'm in park or neutral and the A/C being on or off doesn't make a difference. I changed my spark plugs the other day and the sound went away almost completely. I noticed it would do it a little bit when I would turn right but accelerating and idling sounded beautiful. The next day, however, it came back as bad as before.

2003 Dodge Neon Engine Noise
This is a 2003 Dodge neon se, 4d, automatic. There is a strange noise coming from what i Believe to be one of the cylinders as well as the serpentine belt. Do you know what could be causing either? Thanks!