Repair 7

Install Directions for an LT1 Electric Water Pump

General Motors manufactured its LT1 engine from 1992 to 1997. This eight-cylinder 5.7-liter engine is in a variety of vehicles from General Motors such as the Chevrolet Camaro. The water pump in an LT1 engine cools the cylinder heads first before flowing around the rest of the engine. This allows the engine to run at a higher compression ratio, but also makes a faulty water pump more harmful to the engine.

Instructions

1

Disconnect the electrical wiring from the cooling fan. Remove the right cooling fan assembly with a socket wrench. Remove the left cooling fan assembly if your vehicle was made from 1996 to 1998.

2

Place a suitable container under the radiator. Remove the drain plug and knock sensor with a socket wrench. Drain the coolant from the radiator. Install the knock sensor and drain plug.

3

Remove the air cleaner and air intake duct with a socket wrench. Disconnect the upper and lower radiator hose from the water pump. Remove the heater hose from the water pump and throttle body.

4

Disconnect the electrical wiring from the coolant sensor. Loosen the retainers for the ignition coil bracket, and move the ignition coil out of your way. Remove the air pump bracket and disconnect the air pump, if necessary.

5

Unfasten the water pump mounting bolts with a socket wrench. Detach the water pump and discard its gasket.

6

Mount the new gasket to the new water pump and install the water pump. Torque the water pump mounting bolts to between 30 and 32 foot-pounds. with a torque wrench. Install the air pump if you removed it in Step 4.

7

Fasten the ignition coil bracket with a socket wrench, and attach the electrical wiring for the coolant sensor. Connect the heater hoses to the throttle body and water pump. Attach the radiator hoses to the water pump.

8

Install the air cleaner and air intake duct with a socket wrench. Replace the cooling fans that you removed in Step 1, and connect their electrical wiring. Fill the radiator with coolant.

9

Attach the cable to the negative battery terminal with a socket wrench. Start the engine and check for coolant leaks.