I installed a new water pump, but it sounds like bad bearings when I turn on the AC. I replaced the pump, and the noise is the same. I noticed the AC drive belt vibrating too much at idle, so I tightened it more, but I think it is too tight. It stopped some of the noise, but not all. I tightened the alternator, too, but I don't want to add any more belt tension. I am ruling out water pump bearings. Thoughts?
Vette(s): 1975 C3 Red, T-Tops, Black Interior.
All I need is time and money! Getting there!
Use a dowl rod, such as a long wooden stick. Touch the rod to the alt, pump, etc, one at a time, and place your ear on the side of the rod. The noise will transfer up the you can hear the source when touching different things. DON'T stick the end of the rod in your ear, just in case something bounces and shoves it into your ear. If you can't pinpoint the noise, spray some water or WD40 on the belt and see if it goes away for a moment. WD40 last longer than the water will, but still goes away fairly quickly. Do not use belt dressing or any oil.
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
All the more reason to determine when the noise started.
The way I originally read it, the noise started after the WP install...but...what if the WP was replaced because of the noise, but the noise is still there?
More info is needed...
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