Disconnect battery. Drain cooling system. Remove upper fan shroud. Remove accessory drive belt, fan, fan clutch and water pump pulley from water pump. Disconnect all coolant hoses from water pump. Remove water pump mounting bolts. Remove water pump and gaskets.

Installation

Install water pump with NEW gaskets. Tighten water pump bolts to specification. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure.

Remove the engine oil cooler lines support clamp bolt. (Scheme 22) NOTE: Have a drain pan ready for the engine oil to drain into.
Remove the bolt attaching the engine oil cooler lines to the oil filter adapter. (Scheme 24)
Hold the cooler lines below the bottom of the radiator to drain the engine oil.
Remove and discard the seals.
Remove the engine oil cooler line retaining rings from the engine oil cooler line quick connectors at the radiator engine oil cooler inlet and outlet. (Scheme 19) Follow the next 2 steps for the proper retaining ring removal procedure.
Using a bent-tip screwdriver or equivalent, pull on one of the open ends of the retaining ring in order to rotate the retaining ring. (Scheme 20)
Rotate the retaining ring around the quick connector until the retaining ring is out of position and can be completely removed. Discard the retaining rings.
Remove the engine oil cooler lines from the quick connectors at the radiator engine oil cooler inlet and outlet. Pull the lines straight out from the connectors. (Scheme 21)
Clean all of the components in a suitable solvent, and dry them with compressed air.
Inspect the fittings, the connectors, the cooler lines, and the cooler for damage, distortion, or restriction. Replace parts as necessary.
Flush the engine oil cooler and engine oil cooler lines with the same type of engine oil normally circulating through the engine.

Install new seals on the engine oil cooler lines at the engine oil filter adapter ends.
Install the bolt attaching the engine oil cooler lines to the engine oil filter adapter. Tighten the bolt to 26 ft lbs (35 N.m). NOTE: When performing the following procedure, do not reuse the old retaining rings. Replace the old retaining rings with new ones. Do not install the new retaining ring onto the fitting by pushing the retaining ring down over the fitting.
Install a new retaining ring (E-clip) into each quick connector at the radiator engine oil cooler by following the next 3 steps.
Hook one of the open ends of the retaining ring in one of the slots in the quick connector. (Scheme 25)
Rotate the retaining ring around the connector until the retaining ring is positioned with all 3 ears through the 3 slots. (Scheme 26)
Ensure the 3 retaining ring ears can be seen from the inside of the connector and the retaining ring can move freely in the slots.
Install the engine oil cooler lines into the quick connectors at the radiator engine oil cooler inlet and outlet until a click is heard or felt. Pull back on the engine oil cooler lines to ensure a proper connection.
Install the attaching clamp and the bolt. Tighten the bolt to 89 INCH lbs (10 N.m).
Inspect and fill the engine oil to the proper level.
Start the engine and check for leaks.

Remove the steering linkage shield. NOTE: Have a drain pan ready for the engine oil to drain into.
Remove the bolt attaching the engine oil cooler lines to the remote (frame mounted) oil filter adapter. (Scheme 18)
Remove and discard the seals. (Scheme 19)
Remove the engine oil cooler line retaining rings from the engine oil cooler line quick connectors at the radiator engine oil cooler inlet and outlet. Follow the next 2 steps for the proper retaining ring removal procedure.
Using a bent-tip screwdriver or equivalent, pull on one of the open ends of the retaining ring in order to rotate the retaining ring. (Scheme 20)
Rotate the retaining ring around the quick connector until the retaining ring is out of position and can be completely removed.
Discard the retaining rings. Remove the engine oil cooler lines from the quick connectors at the radiator engine oil cooler inlet and outlet. Pull the lines straight out from the connectors. (Scheme 21)
Remove the remote engine oil filter lines support clamp bolt. (Scheme 22)
Remove the bolt attaching the remote engine oil filter lines to the remote (frame mounted) engine oil filter adapter. (Scheme 23)
Hold the remote engine oil filter lines below the remote engine oil filter lines (engine mounted) adapter to drain the engine oil.
Remove and discard the seals. (Scheme 24)
Remove the bolt attaching the remote engine oil filter lines to the remote engine oil filter lines (engine mounted) adapter.
Remove and discard the seals.
Clean all of the components in a suitable solvent, and dry them with compressed air.
Inspect the fittings, the connectors, the cooler lines, the cooler, the filter lines, and the remote filter adapter for damage, distortion, or restriction. Replace parts as necessary.
Flush the engine oil cooler, the engine oil cooler lines, the remote engine oil filter adapter, and the remote engine oil filter lines with the same type of engine oil normally circulating through the engine.

Install new seals on both ends of each remote engine oil filter line.
Install the bolt attaching the remote engine oil filter lines to the remote engine oil filter lines (engine mounted) adapter. Tighten the bolt to 26 ft lbs. (35 N.m).
Install the bolt attaching the remote engine oil filter lines to the remote (frame mounted) engine oil filter adapter. Tighten the bolt to 26 ft lbs. (35 N.m).
Install the remote engine oil filter lines support clamp bolt. Tighten the bolt to 10 N.m (89 INCH lbs).
Install new seals to the engine oil cooler lines at the remote (frame mounted) engine oil filter adapter.
Install the bolt attaching the engine oil cooler lines to the remote (frame mounted) engine oil filter adapter. Tighten the attaching bolt to 35 N.m (26 ft lbs).
When performing the following procedure, do not reuse the old retaining rings. Replace the old retaining rings with NEW ones. Do not install the NEW retaining ring onto the connector by pushing the retaining ring down over the connector.
Install a new retaining ring (E-clip) into each quick connector at the radiator engine oil cooler inlet and outlet by following the next 3 steps.
Hook one of the open ends of the retaining ring in one of the slots in the quick connector. (Scheme 25) Rotate the retaining ring around the connector until the retaining ring is positioned with all 3 ears through the 3 slots. (Scheme 26)
Ensure the 3 retaining ring ears can be seen from the inside of the connector and the retaining ring can move freely in the slots.
Install the engine oil cooler lines into the quick connectors at the radiator engine oil cooler inlet and outlet until a click is heard or felt. Pull back on the engine oil cooler lines to ensure a proper connection.
Inspect and fill the engine oil to the proper level.
Start the engine and check for leaks.

Scheme 18

Scheme 19

Scheme 20

Scheme 21

Scheme 22

Scheme 23

Scheme 24

Scheme 25

Scheme 26

Raise the vehicle.
Position a suitable container to catch the engine oil when the hoses are removed.
Remove the engine oil cooler pipes from the remote engine oil filter adapter.
Remove the remote oil filter inlet and outlet hoses from the remote oil filter adapter.
Remove the nuts and the remote oil filter adapter from the remote oil filter mounting bracket. (Scheme 27)
If necessary, remove the remote oil filter adapter mounting bracket and bolts from the radiator support.

Install the remote oil filter adapter mounting bracket and bolts to the radiator support, if removed. Tighten the remote oil filter adapter mounting bracket bolts to 22 ft lbs. (30 N.m). (Scheme 27)
Install the remote oil filter adapter and nuts to the mounting bracket. Tighten the remote oil filter adapter nuts to 18 ft lbs. (25 N.m).
Install the remote oil filter inlet and outlet hoses to the remote oil filter adapter.
Install the engine oil cooler pipes to the remote engine oil filter adapter.
Lower the vehicle.

Scheme 27

Water Pump: Removal & Installation GMC Envoy I

Removal