How-To: GM 3800 Series II Water Pump Install (Step by Step)

In this video, I go over a detailed install of a water pump in a ~100k mile '98 Buick LeSabre with a 3800 Series II motor. The gasket had started leaking near the bottom of the pump and the car had steadily been losing coolant till it became a larger evident leak. No overheating until the car had lost enough coolant. I had earlier misdiagnosed the leak as coming from the tensioner coolant elbow(s). These tend to leak in the same areas and the plastic elbows tend to disintegrate over time as evident when they were removed/replaced. This video covers the water pump replacement which fixed the leak. I used an aluminum framed gasket that came with the pump.
ACDelco 251-718 GM Original Equipment Water Pump with Gasket
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Dorman 47065HP Elbow Type Heater Hose
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ACDelco 131-120 GM Original Equipment 195 Degrees Engine Coolant Thermostat with Gasket
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Dorman 419-610 Idler Pulley
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Bando 6PK2385 OEM Quality Serpentine Belt
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Disclaimer: All of the products mentioned in this video were purchased with our own money and we are not associated with any of the brands mentioned. Our opinions are our own and cannot be bought. We chose these particular products based on our needs and budget. The links to products may be affiliate links. Affiliate links allow us to receive a small commission, at no extra charge to you, if you choose to purchase.
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