Repair 7

The Duramax is a series of eight-cylinder diesel engines manufactured by General Motors and Isuzu since 2001. General Motors uses these engines in larger, heavy-duty trucks. For example, the 6.6-liter Duramax is an engine option in the 2002 Chevrolet Silverado 2500HD pickup truck. The water pump circulates coolant around the engine to prevent it from overheating. The water pump on a 2002 Duramax diesel engine is on the front of the engine and is accessible from the left-front wheelhouse of the vehicle.

Instructions

1

Disconnect the inner panel for the left-front wheelhouse with a socket wrench. Place a drain pan under the radiator drain, and remove the radiator drain plug. Drain the coolant into the drain pan, and replace the drain plug.

2

Disconnect the housing for the thermostat and the clutch for the cooling fan with a socket wrench. Remove the balancer from the crankshaft. Disconnect the mounting nuts for the outlet hose, and detach the hose from the water pump. Disconnect the retainer for the engine wiring harness from the outlet hose of the water pump.

3

Remove the mounting bolt from the water pump with a socket wrench. Record the locations of each bolt, since they have different lengths. Detach the water pump and its gasket from the engine.

4

Lubricate the gasket for the water pump with engine oil, and replace the gasket. Install the new water pump and tighten its mounting bolts to 15 foot-pounds with a torque wrench.

5

Connect the retainer for the engine wiring harness to the outlet hose for the water pump. Attach the outlet hose to the water pump and tighten its mounting nuts to 15 foot-pounds with a torque wrench. Replace the thermostat housing and crankshaft balancer with a socket wrench. Install the clutch for the cooling fan.

6

Fill the radiator with coolant. Replace the inner panel for the wheelhouse in the left-front fender.

The water pump in the 1998 Ford Explorer is located on the front of the engine block by the cooling fan. It circulates coolant through the block to prevent the engine from overheating during its operation. The primary symptom of a faulty water pump is a continually increasing engine temperature, even with the proper amount of coolant. A malfunctioning water pump causes excessive wear to the engine and may eventually damage the engine permanently.

Instructions

1

Disconnect the batterys negative terminal with a socket wrench. Position a drain pan under the radiator and open the radiator drain. Replace the plug after the coolant is completely drained from the radiator.

2

Disconnect the cooling fan shroud with a socket wrench. Remove the mounting bolts for the cooling fan. Remove the cooling fan assembly. Disconnect the accessory drive belt.

3

Detach the water bypass hose and heater hose from the water pump. Disconnect the brackets for the wiring harness of the engine control sensor, and push the wiring harness out of the way. Remove the attaching bolts for the water pump pulley with a socket wrench and disconnect the pulley.

4

Remove the attaching bolts for the water pump. Record the position of each bolt since they have different lengths. Detach the pump from the front engine cover. Disconnect the radiator hose from the water pump. Remove the pump from the vehicle and discard its gasket.

5

Clean the mounting surfaces of the pump and front engine cover with a shop towel. Apply a layer of gasket sealer to both sides of the new gasket. Mount the gasket onto the water pump.

6

Connect the radiator hose to the new pump. Install the pump and place the mounting bolts in the correct holes that you recorded earlier. Torque the mounting bolts to between 15 and 21 foot-pounds with a torque wrench. Complete the installation of the water pump by performing steps two and three in reverse order.

7

Refill the cooling system with coolant and reattach the negative battery cable with a socket wrench. Start the engine and check for leaks in the cooling system.

The Jimmy is a mid-size sport utility vehicle made by GMC from 1983 to 2005. The models made from 1995 to 2005 belong to the second generation of the GMC Jimmy and are virtually identical to the Chevrolet Blazer. The 1998 GMC Jimmy has a water pump that the engine powers with a belt. It circulates coolant from the radiator to the engine to prevent the engine from overheating. You can access the water pump in the 1998 GMC Jimmy from the engine compartment near the cooling fan.

Instructions

1

Disconnect the cable to the negative terminal with a socket wrench to keep you from starting the engine while you replace the water pump. Place a sealable container under the radiator petcock and open the petcock. Allow the coolant to drain from the radiator into the container.

2

Rotate the belt tensioner pulley with a wrench to relieve the tension on the drive belt and remove the drive belt with a socket wrench. Disconnect the upper cover for the cooling fan and remove the pulley for the water pump. Release the clamp for the hose to the water pump and disconnect the hose.

3

Remove the retaining bolts for the water pump with a socket wrench and detach the water pump from the engine. Record the position of each retaining bolt as they may have different lengths. Discard the gasket for the water pump.

4

Apply a thin layer of 1052080 sealant to the threads of the retaining bolts for the water pump. Place a new gasket onto the new water pump and mount the water pump to the engine. Install the retaining bolts for the water pump and tighten them to 30 ft. lbs. with a torque wrench.

5

Attach the coolant hose to the water pump and secure it with the retaining clamps. Connect the pulley for the water pump and place the drive belt over the pulley. Allow the tensioner to contact the drive belt and install the upper fan cover with a socket wrench. Connect the negative battery cable and fill the radiator with coolant. Start the engine and check for leaks in the cooling system.

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.

The Chrysler Sebring is a series of mid-size cars in production since 1995. The 2001 model was the first of the second generation Sebrings, which was produced until 2005. The 2001 Chrysler Sebring has a mechanical water pump, like other modern vehicles. The engine drives the water pump with a belt, which circulates a mixture of water and antifreeze around the engine. The water pump in a 2001 Chrysler Sebring is attached to the front of the engine block.

Instructions

1

Allow the vehicle to sit overnight to ensure the coolant is not hot. Use a socket wrench to disconnect the cable to the negative battery terminal, so you dont accidentally start the engine.

2

Place a sealable container under the radiator and remove the drain plug for the radiator. Allow the entire contents of the radiator to drain into the container. Replace the drain plug and seal the container of coolant.

3

Use the socket wrench to remove the tensioner pulley for the timing belt.

4

Use the socket wrench to disconnect the brace for the alternator. Remove the mounting bolts for the water pump and disconnect the water pump. Discard the O-ring for the water pump.

5

Clean the O-ring mating surfaces on the water pump and the engine block with a shop towel to remove any remaining material from the O-ring. Place the new O-ring into position on the new water pump and install the water pump to the engine. Tighten the mounting bolts for the water pump to 117 in. lbs. with a torque wrench. Install the brace for the alternator and tighten its mounting bolts to 17 ft. lbs. Install the tensioner pulley for the timing belt.

6

Connect the cable for the negative battery terminal with a socket wrench. Refill the cooling system and start the engine. Check for leaks in the cooling system and repair as necessary.

Marine engines need to cool themselves internally to ensure consistent performance. The Evinrude Outboard does this by pumping water into the exhaust manifold. Over time, parts of the water pump fall victim to wear and tear, which reduces the effectiveness of the pump. Without a fully functioning water pump, the engine can overheat, leading to further damage.

Instructions

1

Open the Evinrude Outboards lower unit to gain access to the water pump. This is located at the top of the unit.

2

Place a drive shaft seal into the opening on top of the water pump housing, using a socket wrench to push the seal firmly into place. Cover the seal lightly in grease.

3

Put a new water tube grommet in the top of the pump housing.

4

Put gasket sealing compound on the replacement gasket for the impeller plate. The gasket fits onto the lower unit cover. The impeller plate fits on top of this.

5

Place the drive pin into the driveshaft. You may find a small amount of grease helps with this process.

6

Paint a thin coat of grease on the opening to the impeller housing and slide the impeller down onto the drive shaft. When done correctly, the groove in the impeller will slide over the drive pin.

7

Slip the pump housing over the impeller and twist the driveshaft by hand in a clockwise motion.

8

Place the water pump over the lower units studs. Add lock washer and nuts, tightening with a torque wrench to 75 inch-pounds.

When internal combustion engines run, the air and fuel combustion that takes place inside the cylinders releases moisture from the air, which generally gets sent out the exhaust system as water vapor or steam. If the engine and exhaust system are cold, moisture can condense from the steam to form a liquid that may drip out of the tailpipe.

Small Amounts

A small amount of water dripping from the tailpipe of a cold engine is normal, and should cause no concern. Some cars exhausts might drip constantly if they are used only for short trips, as the engine and exhaust system may never get hot enough to prevent the exhaust moisture from condensing back to liquid. The biggest danger of chronic small amounts of water in the exhaust system is the possibility of rusting out the system prematurely. Many exhaust systems are made from stainless steel to prevent rusting.

Large Amounts

If there are large amounts of water dripping from the tailpipe, it can be symptomatic of a leaky head-gasket, which is a serious and costly repair. Usually, when head gaskets begin leaking, the exhaust plume becomes quite thick and light colored and may emit a sweet odor. This is produced by your engine coolant being boiled and exhausted from the combustion chambers. Seek mechanical help immediately.

Considerations

When the air is humid, more moisture may be present in automobile exhaust. Likewise, if the air is cold, some moisture may drip from the exhaust pipe until the engine and system get hot. If the amount of moisture dripping from exhaust pipes appears excessive, have a reputable mechanic look at the vehicle.

The Generation II LT is a series of eight-cylinder engines manufactured by General Motors. The LT1 version has a displacement of 5.7 liters and was in production from 1992 to 1997. The LT1 appears in high-performance General Motors cars made during this period, such as the Corvette, Camaro and Firebird. The water pump for the LT1 circulates coolant to the cylinder heads, which then flows through the engine block. A faulty water pump can cause the engine to overheat even when it has coolant.

Instructions

1

Disconnect the cable from the negative battery terminal with a socket wrench. Detach the electrical connector from the cooling fan. Disconnect both cooling fan assemblies.

2

Position a drain pan under the radiator and disconnect the knock sensor. Remove the drain plug for the radiator and allow coolant to drain into the drain pan. Replace the drain plug and connect the knock sensor.

3

Disconnect the air filter and air intake duct with a socket wrench. Detach the radiator hoses and heater hoses from the water pump. Remove the heater hoses from the throttle body. Detach the electrical connector from the coolant sensor.

4

Release the retainers on the bracket for the ignition coil, and push the ignition coil aside. Disconnect the air pump and its bracket with a socket wrench, if your vehicle is so equipped.

5

Remove the mounting bolts for the water pump with a socket wrench, and disconnect the water pump. Discard the gasket for the water pump, and clean the mating surfaces for the gasket with a clean shop towel.

6

Install the new water pump and gasket. Tighten the mounting bolts for the water pump to between 30 and 32 ft. lbs. with a torque wrench. Connect the air pump and its bracket, if your vehicle is so equipped. Place the ignition coil and bracket into their proper position, and fasten their mounting bolts with a socket wrench.

7

Connect the electrical connector for the coolant sensor. Attach the heater hose to the throttle body. Connect the heater hose and radiator hoses to the water pump. Connect the air intake duct and the air cleaner with a socket wrench. Install the cooling fans and attach their electrical connectors.

8

Fill the radiator with coolant, and attach the cable to the negative battery terminal with a socket wrench. Start the engine and check for coolant leaks.

The Chrysler Sebring is a mid-size sedan that Chrysler has produced since 1995. The 1998 model is a first-generation Sebring that was in production until 2000. The most common engine in a 1998 Chrysler Sebring is a 4-cylinder, 2.0-liter with a multi-port fuel injection. The water pump for these engines is located on the front of the engine block, under the cover for the timing chain. The procedure for installing the water pump requires you to drain the cooling system.

Instructions

1

Remove the cable on the negative terminal of the battery with a socket wrench. Turn the engine crankshaft clockwise so that the first cylinder is at top dead center. This position will align the timing marks on the camshaft sprockets.

2

Raise the vehicle with a jack and support it on jack stands. Disconnect the inner splash shield from the engine with a socket wrench. Remove the accessory drive belts.

3

Place a drain pan under the drain plug of the radiator and remove the drain plug. Allow the coolant to drain into the drain pan. Replace the drain plug and store the coolant for later use.

4

Support the engine with a floor jack and disconnect the right mount for the engine with a socket wrench. Remove the timing belt, timing belt tensioner and camshaft sprockets.

5

Disconnect the attaching bolts for the water pump with a socket wrench and remove the water pump. Discard the O-ring. Clean the mounting surface for the O-ring with a shop rag.

6

Install the new O-ring onto the new water pump and ensure it is properly seated into its groove. Install the water pump and tighten its mounting bolts to 105 pound-inch with a torque wrench. Turn the water pump by hand to ensure that it rotates freely.

7

Connect the camshaft sprockets, timing belt tensioner and timing belt with a socket wrench. Replace the timing belt cover and install the bracket for the right engine mount. Lower the floor jack and connect the right splash shield for the engine.

8

Lower the vehicle with the jack. Install the accessory drive belt and adjust it to the proper tension. Fill the coolant to the proper level and connect the negative battery terminal with a socket wrench. Start the engine and check for coolant leaks.

The Mitsubishi Mirage is a subcompact car that was in production until from 1978 to 2002. The 1995 model is a fourth generation Mirage, which includes 1991 to 1996 models. This vehicle was available with a 1.5-liter engine or a 1.8-liter engine, and the water pump replacement procedure is the same for both engines. The water pump in a 1995 Mitsubishi Mirage is located on the front of the engine above the cooling fan.

Instructions

1

Remove the negative battery terminal with a socket wrench to ensure you dont start the engine unintentionally. Place a container under the drain for the radiator and remove the radiator drain cock. Drain the coolant into the container and replace the drain cock. Seal the container of coolant and store it for later use.

2

Disconnect the engine undercover and the bolt for the power steering hose with a socket wrench. Detach the engine drive belts. Support the engine with a floor jack and a wood plank to serve as a cushion for the engine.

3

Disconnect the engine mount bracket and the timing belt with a socket wrench. Remove the power steering pump bracket and the alternator brace.

4

Disconnect the mounting bolts for the water pump and record their position, since they have different lengths. Remove the water pump and its gasket.

5

Clean the mounting surfaces on the water pump and engine block with a shop towel. Lubricate the new O-ring with water and place it into its mounting groove on the water inlet pipe. Install the new water pump and torque the mounting bolts to 17 ft. lbs with a torque wrench.

6

Connect the additional components you removed earlier by reversing steps 2 and 3. Refill the cooling system and connect the battery with a socket wrench. Run the engine until the radiator fills completely. Check the coolant level and top it off to the correct level.

Saab is a Swedish car manufacturer owned by Spyker Cars NV. The 2001 models include the 9-3 and 9-5, which are both executive cars. The most common engine for the 2001 SAAB is a 4-cylinder 2.0-liter turbocharged engine. The procedure for replacing the water pump is generally the same for all engines. The replacement of the water pump in a 2001 SAAB requires the removal of several major components in the engine compartment.

Instructions

1

Disconnect the cable for the negative battery terminal with a socket wrench to prevent you from starting the engine. Remove the pressure cap for the expansion coolant tank. Place a drain pan under the drain hole for the radiator and remove the radiator drain plug. Let the coolant drain into the drain pan and replace the drain plug.

2

Remove the center deflector on the engine. Disconnect the right front wheel and the inner fender panel. Detach the electrical connector and hoses for the expansion tank, then remove the expansion coolant tank.

3

Lock the tensioner for the drive belt by pulling firmly on the belt. Remove the belts for the air-conditioning compressor and water pump with a socket wrench. Place a shop towel over the cross member of the upper radiator and the engine oil cooler to protect them from contamination during the water pump replacement.

4

Detach the electrical connector for the air conditioning compressor and remove the air conditioning compressor with a socket wrench. Disconnect the bracket for the air conditioning compressor and disconnect the hoses on the water pump. Detach the wire for the oxygen sensor on the water pump. Disconnect the coolant pipes to the turbocharger and water pump.

5

Remove the bolts that attach the water pump to the timing cover with a socket wrench. Pry the water pump from its sleeve on the cylinder block and pry around the water pump to dislodge it from the sleeve. Disconnect the pulley for the water pump and remove the water pump from its housing.

6

Install the new water pump by performing steps 2 through 5 in reverse order. Tighten the bolts for the water pump pulley to 72 inch pounds with a torque wrench. Tighten the mounting bolts for the water pump to 15 foot pounds.

7

Fill the radiator with coolant. Connect the cable to the negative battery terminal with a socket wrench. Start the engine and check for leaks in the cooling system.