Rattling noise in engine compartment when started cold

From: Parker, Jon (GRCI) (ParkerJ@Pragmatics.com)
Date: Tue Dec 17 2002 - 17:29:10 EST

I am experiencing an intermittent "rattling" noise when I first start my Dak
on cold mornings. It seems to be coming from the front of the engine
compartment, on the passenger side. I can't tell if it is coming from an
accessory or the motor itself. The noise is somewhat subtle, and subsides
with rising outside temps or when the engine warms up - although it can
still be detected. It is most prominent when started cold on a cold
morning. I can find nothing "loose" that would cause this noise.

I'm inclined to think it is not the valve train as the rattle "varies" at a
steady RPM. I did have my lower intake manifold gasket replaced recently,
which I believe involves complete and partial removal of the upper
accessories. Perhaps they didn't put things back together quite right.

Any thoughts?

Thanks.

Jon

99 4x4 CC 5.2L Auto Sport+

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