I find it very interesting that there have been over 150 looks at these postings and not one person can give us a clue as to what the solution is. I have used belts from Mazda, Goodyear, Dayco, and Kelly Springfield, and all have failed to make even a little difference in the noise. I have also heard (on a different site) that some people claim to have had better luck with NAPA/Gates belts, but I don't know about the accuracy of that. I realize that this is a long shot, and there is no way to prove it besides investing the time and money in a stock-type replacement pump. I wonder if the inertia of the heavier cast impeller is causing the belt to slip over the water pump pulley. I do not know if it has any bearing on anything, but the stock pump has a sheetmetal impeller wheel, while the aftermarket units have a cast impeller. I have noticed that there is a difference between the stock pump and most aftermarket pumps I have seen. Have you had the timing belt and water pump replaced on your car? My problems (with both Proteges) started after water pump and timing belt replacements. I had to replace it when the car threw the alternator belt on the expressway. If anybody has any other ideas, I'd gladly listen to them. The only thing I have not changed is the water pump itself, and I hate to do it, as the pump is pretty expensive ($100 for the part), and I think I would push the car over a cliff if that didn't fix the problem. I have tried different makes of belts (including the OE), alternators, setting a straight edge against the edges of the pulleys to make sure they are lined up properly, physically cleaning out the pulley grooves, and adjusting the belt tension. Both cars have aftermarket Duralast water pumps in them, and I am starting to think there may be a trend. Now, my sister-in-law's car is doing the same thing, after a water pump replacement. Instead of replacing the water pump, I cleaned out all the pulleys and put it back together.
#1998 WIDE MOUTH PROTEGE CAR FULL#
I bought another water pump (from a different manufacturer), but found the grooves in the crank pulley and water pump pulley full of melted rubber and debris. The car was OK for a while, then noise again. I replaced the alternator again, under warranty. I replaced it, and all seemed OK for about two months. I took the belt off, noticed there was a bit of play in the alternator shaft, and thought that maybe I had a bearing problem with the alternator. I noticed that the problem was much worse with any electrical accessories on. About a month after doing the water pump, the problem manifested itself. I replaced the water pump on my car when I did the timing belt at 135,000 miles, and I replaced both the belts at that time.
Both are 1.5 liter automatics with A/C and P/S. I have been having the same problem with both my 1997 Protege and my sister-in-law's 1997 Protege.
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