View Full Version : 91 Nissan 240sx Ka24de howling sound from intake manifold?

08-25-2012, 05:25 PM
My 240sx recently started making a sound from the intake manifold area of the engine bay. This has been going on for about two weeks now. I had suspected it was the alternator bearing so I replaced it. The sound is still there and I do not know what could cause it. Here is a video of the problem. It is not the throw out bearing or the transmission. I just had a clutch job done a few months back and replaced the throwout bearing. I have checked the vacuum lines linking to my intake but nothing is loose.

when the dual altima electric fans come on, the sound goes away.


08-25-2012, 09:40 PM
Do you have AC?

08-25-2012, 11:46 PM
Yes I do. But the sound is coming from intake manifold area. Not the compressor