Lost oil pressure on the 2002 5.3 LS Chevy 1500 Avalanche . Time to replace the oil pump!
Same on Suburban | Tahoe | Silverado | Yukon
In this video we will tear down the engine all the way to the oil pump while the engine is in the truck. We drop the oil pan and expose the pickup tube. We replace the oil pump with a Melling high flow oil pump and replace the water pump and thermostat, along with all new gaskets and O-rings as well.
⚡Chevy avalanche 5.3L oil pan plug torque 18ft lbs.⚡
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Ratchet Contour Handle 3/8-inch Drive x 9-inch Long Reach: amzn.to/35xZD8V
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REPLACED THE FOLLOWING PARTS,⚡🧰
Replace WATER PUMP. ACDelco: amzn.to/36EIvNV
Replace THERMOSTAT. ACDelco Thermostat with Water Inlet: amzn.to/3lx11ON
OIL PUMP, Melling 355 - LS Oil Pump 25 PSI: amzn.to/2KbfwtN
or Oil Pump, Wet Sump, Internal, High Volume, GM LS-Series: amzn.to/3GUhUxn
Pickup Tube O-RINGS for Oil Pump Melling M29517 LS: amzn.to/35KT5Us
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The water pump is a belt or chain-driven engine accessory bolted to the engine above the crankshaft pulley. The pump housing has an impeller that circulates engine coolant through the cooling system passageways in the engine block and cylinder head, on to the radiator, where the coolant temperature is reduced. . The lower temperature coolant then flows back to the water inlet on the engine and the water pump continues the cycle.
When to consider replacing the water pump:
Coolant leaks or overheating. The water pump impeller shaft is supported by a bearing. Eventually, the bearing or seal can wear and leak or damage the impeller. Many water pumps have weep holes near the pump bearing. If you see significant leakage from that weep hole, it is time to replace the pump. If the water pump shaft does not turn smoothly or the pump is noisy, the bearing is excessively worn. Pump replacement will be necessary.
In engines where the water pump is driven by the timing belt, it is a good idea to replace the water pump at the same time the timing belt is replaced. The extensive work explains why it is always recommended to replace the water pump whenever the mechanic already has these components removed for regularly scheduled timing belt replacement.
How do mechanics replace the water pump?
Bolts holding the pump to the engine are removed and the pump is pulled out.
Gasket surface must be cleaned and the pump mounting surface inspected. New gasket, rubber seal, or RTV sealant, as required, is installed and then the new pump. The bolts are torqued in sequence using a calibrated inch pound torque wrench.
The 5.3L LS, or Vortec 5300, is primarily a truck/SUV engine.
See REPAIRS 5.3 LS CHEVY VORTEC 1500 AVALANCH Playlist for more;
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