Date: Fri, 21 Nov 1997 04:44:28 GMT
From: Ywan Mason <>
Subject: Re: 87 900 water pump question

First let me begin with, MAN MY EMAIL IS SCREWED!! Why did it send the same message so many times? Forgive me, it wasn't my fault that I know of. > Since you have to do all thet work just to get to the water pump (worst > if you have A/C), why not spend the $37.00 and replace the whole thing? > Joe If you are going to replace it with a $37 unit, you'd be just as well putting the original back on. $37 water pumps are usually Japanese (GMB I think is the brand) with a cheap metal impeller that either dissolves away in the coolant or separates from the shaft if the bearing in them lasts that long. Then you have a mysteriously overheating engine. Or one that suddenly, with no warning throws the bearing and the belts. The factory pump is designed to begin to weep coolant out its hole when bearing failure begins so you have warning. I have seen many GMBs drop the bearing and never leak a drop or give noise before hand. No way are they the equivalent of the factory pump which costs only a little more ($88). I commonly see aftermarket pumps fail in less than a year. Then you're right back there doing the same thing again if you are lucky. Or a whole set of belts and possibly a crank sensor on newer models if the bearing seizes and throws the belts around the crank pulley. If you are unlucky, you are replacing a head gasket or engine at the same time. I agree with you though, that if you go that far, you should replace the pump, I would. If you read the post in its entirety though, I gave what to check for in a pump if just the gasket were leaking. Unless just installed by someone who either used a high speed die grinder and removed too much aluminum from the front cover or didn't properly clean the old gasket off (presuming the pump was a factory unit with the supplied quality gasket), I have found over the last 15 years that the gasket is never the problem. Leaks from that area, if not originating from the weep hole, come from the hose clamps loosening on the hoses to the rear of the pump. Ywan Mason (hoping this only goes out once!)

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