1989 Chevy C1500 5.7 FI I went to replace the thermostat and when i had my ratchet on the bolt with the wires running to it on the housing, i accidentley brought the ratchet all the way to the back of the wire and touched it to the live wire. there was a big spark and now my truck will just turn over but not start. starter stays engaged even after i take out the key sometimes. if i remember right, when i was doing the thermostat after the arc, i touched the ratchet to the live wire again and it didnt spark anymore. any help is greatly appreciated

Place a catch pan under the drain valve of your Venture radiator.

Open the radiator valve and drain at least 2 quarts of coolant. Then close the drain valve.

Remove the air cleaner and duct assembly from the top of the engine to gain access to thev thermostat housing. Use a screwdriver and a ratchet and socket if necessary.

Disconnect the crossover exhaust pipe using a ratchet, ratchet extension and socket.

Follow the upper radiator hose towards the engine to locate the thermostat housing.

Disconnect the upper radiator hose from the thermostat housing. Use a pair of rib joint pliers to loosen the clamp, and then slip it off the thermostat housing towards the radiator. Other Venture models may use a worm clamp type, which you can remove using a standard screwdriver or ratchet and socket.

Remove the upper radiator hose from the thermostat housing by carefully twisting and pulling the hose off the fitting.

Unscrew the two mounting bolts from the thermostat housing using a ratchet, ratchet extension and socket. Detach the thermostat housing from the engine.

Note the exact position of the thermostat so that you install the new one the same way. Then remove the thermostat and gasket.

Apply a light coat of room temperature vulcanizing (RTV) sealer to the threads of the thermostat housing bolts.

Set the new thermostat and new gasket in place.

Set the thermostat housing in place and start the two mounting bolts by hand. Then tighten the bolts using the ratchet, ratchet extension and socket.

Connect the upper radiator hose to the thermostat housing.

Tighten the upper radiator clamp over the thermostat housing using the rib joint pliers, standard screwdriver or ratchet and socket.

Connect the crossover exhaust pipe using the ratchet, ratchet extension and socket.

Install the air cleaner and duct assembly using the screwdriver or ratchet and socket.

Add coolant to the radiator using a 50/50 mixture of distilled water and anti-freeze.

Start the engine and check the upper radiator hose and thermostat housing for leaks