A bad water pump may leak, become noisy or get stuck and overheat your 1989 Acura Integra's engine. Since the pump sits behind the timing belt cover on the engine front end, this is an involved repair job. Still, you can replace the water pump in your garage with the right tools. If you are doing this type of job for the first time, plan on a weekend to install the new pump. However, you will save your Integra's engine from major damage and yourself some money in repair costs.
Tools Used: Wrench set, Large drain pan, Ratchet, Short ratchet extension, Socket, Handle 07JAB-0010200, Pulley holder attachment 07JAB-0010100, Socket wrench 07JAA-100100, White marker, Large screwdriver, Brush, Shop rag, Large screwdriver, Water pump O-ring, Torque wrench
Replace a Water Pump
Preparation
Turn off the engine and open the hood. Detach the battery ground (black) cable with a wrench. Loosen the radiator cap. Place a drain pan under the radiator. Drain the cooling system by turning the drain plug at the bottom of the radiator counterclockwise and removing the plug. Cover the pan, if you plan on reusing the coolant. Remove the upper timing belt cover from the engine front end with a ratchet, short ratchet extension and socket.
Rotate the crankshaft pulley, the one at the bottom of the engine front end, with a ratchet and socket until the mark on the crankshaft pulley aligns with the arrow mark on the back cover, and the "Up" marks on the camshaft sprockets above align with the marks on the top of the cylinder head.
Remove the alternator, power steering and air conditioner (A/C) belts.
Remove the crankshaft pulley using handle 07JAB-0010200, pulley holder attachment 07JAB-0010100, socket wrench 07JAA-100100 and ratchet.
Remove the lower timing belt cover with a ratchet, short ratchet extension and socket.
Removing the Water Pump
Scribe an arrow on the timing belt with a white marker to indicate direction so that you reinstall the timing belt in the same position, if you plan to reuse the timing belt. If you are installing a new belt, it does not matter which edge of the belt is facing outward.
Loosen the center bolt on the timing belt tensioner pulley about half a turn counterclockwise with a ratchet and socket. This is the pulley directly above the crankshaft sprocket. Then push the tensioner toward the center of the engine with a large screwdriver and tighten the tensioner bolt again. This will release timing belt tension. Make a note of the timing belt routing, if necessary, so that you reinstall the belt in the same position and remove the timing belt.
Unfasten the water pump mounting bolts with a ratchet, short ratchet extension and socket. The water pump is the unit with the sprocket directly above and slightly to the right of the timing belt tensioner. Remove the water pump and the O-ring behind the water pump.
Clean the water pump mounting surface using a wire brush and shop rag. Position the new water pump in place with a new O-ring and install the mounting bolts finger tight. Tighten the 6 mm bolts to 9 foot-pounds and the 8 mm bolts to 126 foot-pounds using a torque wrench, short ratchet extension and socket.
Reinstall the timing belt and loosen the center bolt on the timing belt tensioner pulley so that it pushes against the timing belt. Torque the center bolt to 33 foot-pounds using the torque wrench and socket.
Reinstall the crankshaft pulley and mounting bolt snugly and rotate the crankshaft two revolutions and realign the marks on all the pulleys. Then remove the crankshaft pulley.
Replace the timing belt cover and crankshaft pulley using the special tools. Torque the crankshaft pulley to 119 foot-pounds with the torque wrench, handle 07JAB-0010200, pulley holder attachment 07JAB-0010100 and socket wrench 07JAA-100100.
Replace the alternator, power steering and A/C belts. Replace the drain plug and fill the cooling system. Attach the battery ground (black) cable and close the hood.
Tips & Warnings
You may rent the special tools needed for this job in your local auto parts store. If necessary, visit your local auto parts dealer.
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