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1999 S10 H2O Pump Replacement??

Old 06-12-2019, 03:49 PM
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Default 1999 S10 H2O Pump Replacement??

My youngest son has a 1999 Chevy S10, 4.3L V6. It's old but only has 85,000 miles on it. It runs well and we're really hoping to get another year or two out of it. The check engine light came on and there were 2 different codes that were fairly non-specific so I just took it to the shop we deal with when I can't or don't have time to fix it. Turns out it needed a new Mass Airflow Sensor and a Fuel Tank Pressure Sensor. I had them do the MAF sensor and will probably do the Fuel Tank Pressure sensor myself before too long. When I went to pay for the repairs, the shop owner informed me that they also noticed a small water leak at the water pump but, he said it wasn't too bad and to keep an eye on it.

Knowing how quickly such things can go south, I'm debating doing the replacement myself. The pump is around $40 so I'd be saving $250+ in labor. Looking at videos on YouTube, it looks fairly straight forward. Any advice, words of wisdom for such a repair?

Thanks
Old 06-12-2019, 05:40 PM
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It’s as easy and straight forward as it looks on that one. While you are changing it go ahead and do a tensioner, all idlers, thermostat, and top/bottom coolant hoses. Sounds like a lot, but cheap parts and you will already be touching most of it.
Old 06-13-2019, 03:42 AM
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It does look pretty easy, just wanted to make sure there was no "hidden issue". I had the upper/lower intake manifold gaskets replaced 3 years ago and they did the hoses, belts, pulleys, etc a the same time so they should be good. Probably will do the thermostat. Like I said, trying to get another year or so out of it but it seems more and more little things are starting to go bad.

Thanks!!
Old 06-13-2019, 04:28 AM
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Good little trucks. I had a 96 that we sold to an employee in 2003 or so. He is still driving it some. Has over 300k on it. Weak link is definitely the transmission on them, especially if you tow at all with them. But cheap to replace.
Old 06-13-2019, 10:22 AM
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Sometimes getting the fan off can be tricky/tight. There are multiple videos on-line, but I used a big wrench, hammer, ratchet strap, and duct tape to hold the pulley.
Old 06-13-2019, 11:40 AM
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I still have a 99 S-10 Zr2. Original owner and it has right at 200,000 miles. Over the years I have replaced the water pump twice. Really nothing to it other than just a little time.

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