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'14 Y61 ZD30 CRD M/T ST
4,032 Posts

I'm getting a high pitch squeal on startup and for about 5 minutes into operating. Squeal gets louder as I accelerate. Occasionally can be heard after the 5 minutes, but the first 5 minutes is when it's most prominent. Haven't been able to pinpoint where the noise is coming from.

Not sure if it's relevant but have recently had the AC connection that goes through the firewall replaced as it was leaking. Maybe he left or knocked something loose in the process?

Video for reference:

High pitch squeal on a ZD30 that goes away after engine warms up is 99.999% of the time, a warped exhaust manifold.
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