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NM35 - What's that grinding noise


Akshunhiro
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Hey all, my M35 is coming up to 150 thousand and was worried my turbo was about to die but this noise has been occurring on and off for a while.

It seems to be more evident during warmer weather or when the car has been in heavy traffic for a bit.

Occurs during acceleration but more obvious at lower speeds. Happens when revving in neutral too so doesn't appear to be driveline (unless it's gearbox).

Sound is a deep grinding and comes from the front passenger side but I'm sure if it was turbo, it would've died by now.

I haven't had a chance to pull ancillary belts off yet but also worried about keeping it cool when it gets to temp. I was thinking it may be the fan pulley bracket or water pump?

I have the stickers for the 100,000km service so imagine water pump was part of that service?

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Appears to be AC compressor. Had tested that but only after it'd been running for a while so was already making the noise.

Have been driving around without AC and haven't heard it since.

Apologies, I thought this issue may have been more common.

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