Another Mazda update 

"Funktheduck" (funktheduck) 03/15/2019 at 16:18 • Filed to: None

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Still no answers. Took the big drive to my uncle’s shop. They spent almost the whole day with it and can’t find anything wrong. Runs and drives fine but makes weird and different noises depending on what’s going on (how long driving, speed, etc).

NOT:

brakes (despite very much sounding like the brakes)

CV axels

Wheel bearings

NKato > Funktheduck 03/15/2019 at 16:30

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 If the noises are varying according to distance driven, it could be something thermal or friction related. Have you tried a different set of tires? 

BeaterGT > Funktheduck 03/15/2019 at 16:34

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Is it noise only or can you feel it in the wheel/pedals?

Future Heap Owner > Funktheduck 03/15/2019 at 17:43

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Most mysterious.

C an you hear it if you rev the engine in neutral? Have you tried it both cold & warm?

Spamfeller Loves Nazi Clicks > Funktheduck 03/15/2019 at 17:52

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That’s bad. That’s real bad.

Symptoms and noises like that which vary on temperature after having ruled out all other noise complaint sources mean it’s likely not body related either.

Which means: expensive as fuck.

Runs and drives fine, sounds like brakes, shows up based on temperatures and distances? It’s all very, very big stuff. Generally transmission internals or structural failure.

Funktheduck > Spamfeller Loves Nazi Clicks 03/15/2019 at 18:05

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I’m leaning transmission at this point. At just shy of 175k miles on the original clutch, I’m thinking that’s related 

Funktheduck > NKato 03/15/2019 at 18:06

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I have not but I doubt it’s them. The sounds can sound very metallic

Funktheduck > Future Heap Owner 03/15/2019 at 18:06

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Only while moving. Coasting: no noise. Slowing down or speeding up: noise

Funktheduck > BeaterGT 03/15/2019 at 18:07

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Nope

Funktheduck > Spamfeller Loves Nazi Clicks 03/15/2019 at 18:08

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I should add: no slippage of the clutch even after the noises start and no issues going into or out of gear. No popping out of gear. 

Future Heap Owner > Funktheduck 03/15/2019 at 18:14

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Hmm, so it needs to be under load. Based on that and the temperature dependency, it sounds engine related. I’d guess something to do with the engine and air, especially since when slowing down, the vacuum system to the brake booster is the only thing that’s doing much work.

NKato > Funktheduck 03/15/2019 at 19:00

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It can be a pulley bearing.

Funktheduck > NKato 03/15/2019 at 19:22

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Related to car speed, not engine speed though 

NKato > Funktheduck 03/15/2019 at 19:41

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Hmmmmm....