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06-08-2017, 01:24 PM | #1 |
A.D.D. FTL
Join Date: Oct 2006
Location: Jacksonville, FL
Posts: 3,017
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Engine noise... harmonic balancer? (Anyone have part number for that?)
Soon as my Mach hit 100k it started making a new noise. I don't notice and shaking or vibrations, unless it was a gradual onset and I have just been used to it. I don't notice much/any change in driveability but I have been taking it super easy since I first discovered the noise.
It doesn't matter if my AC is on or not, though I do notice my AC causing my car to sorta "hiccup" a bit more than usual as of recently. But it isn't coming from that area as far as I know. Changed idler pulley and drivebelt so far. 1. At start-up I get an interesting flutter, almost exhaust leak sound near the heads/headers, and only lasts during the start-up motion and goes away 2. Initially the car idles fine 3. After driving the car a bit, a ticking sound occurs. Sounds like a pulley maybe possibly. Changes loudness with rpm 4. A chirping-esque sound occurs under load and goes away on deceleration. Chirp intensity increases as rpm increases. I can usually trigger it in 3rd/4th gear around 2500-2800 rpm, and it occurs "naturally" in 5th when I get around 2100 rpm. Videos: Idle (ticking sound) https://www.youtube.com/watch?v=Mua6Iw1xSqo Driving (chirping sound... tough to hear, sorry) https://www.youtube.com/watch?v=0beyKloTnZY (chirping kicks in @ 3 seconds) https://www.youtube.com/watch?v=CfHcuhwie9k (chirping kicks in after the random clunk @ 6 seconds) Ideas? Sorry for the long post. Any the part number for harmonic balancer, anyone have it or a link to a OEM or OEM-like one? |
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