I have removed the alternator& water pump form

Go to You Tube Video & watch

You must remove the intake manifold.

have the alternator bench tested for correct out put. Check the drive belt tension as the alternator may be slipping under load

Here's a link to your problem.

Your water pump is operated y the timing belt, so therefore you have to remove the timing belt to replace the water pump and then retime the motor. If you don"t know how to time the motor you would be better off to take it to a mechanic.

Its a good question, and some might say gasket sealer is ok. On the other hand gaskets are made to fill the area between the housing and the pump and I would recommend it and if you feel the need to use your sealer you can use it in combination with it. If you have any other questions please feel free to ask.

For 1994 Plymouth Truck Voyager 2WD 3.0L MFI 6cyl the MAP Sensor is located under hood, passenger side, upper engine area, end of intake manifold cover, mounted next to alternator on engine.

Hope helps (remember rated this).

The oil pump removal procedure for Plymouth Voyager 2000.
A oil pump is usually located in the oil pan. If you want to change the oil pump and replace it with a new one, roll up your sleeves and get ready for some dirty work.
The procedure to remove oil pump is as follows:--

• Drive your vehicle up onto ramps or lifts so you have room to work as you pull out the oil pump. You could also use a jack, but make sure you brace the front wheels so they don't roll. In addition, set the emergency break firmly into position so the car doesn't roll.
• Remove the engine front cover then drain the engine oil and take out the oil pan. It is under the engine and looks like the bottom of the motor.
• Unscrew the oil pump mounting bolts with a wrench and proceed to remove the oil pump itself by pulling it down and out of the engine. Avoid getting any contaminants into the oil pump assembly while removing.

The Water pump removal procedure for Plymouth Voyager 2000.
The water pump is the heart of the Plymouth Voyager's cooling system, circulating the coolant. When the water pump is faulty, it can cause serious damage to the engine of your Plymouth Voyager.

• Disconnect the negative battery cable.Place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.
• Remove the right inner splash shield and the accessory drive belts. Support the engine underneath and remove the right motor mount with the bracket.
• Take off the front cover and remove the timing belt along with the timing belt idler pulley. Also remove the camshaft sprockets, the rear cover to the timing belt and the alternator with its bracket.
• Loosen and remove the bolts to the water pump and remove it from the engine.Install the new water pump after inserting a new o-ring gasket. Tighten the bolts to 105-inch lbs. Make sure that the pump can move freely by rotating it by hand.
• Replace all components in reverse order. Tighten the camshaft sprocket bolts to 75 foot pounds and the timing belt idler pulley to 45 foot pounds.
• Refill the cooling system with coolant and reconnect the negative battery cable. Start the engine and check for leaks when it reaches normal operating temperatures.

Loud noises coming from the cooling system could be a sign that your water pump needs replacing. A leak in the coolant may also be an indicator. You can expect that a water pump will need to be changed every 70 to 100 thousand miles or so in a Plymouth Voyager vehicle.
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It is recommended because if you have to change the water pump belt change since you have to remove it and you save work in the future as we recommend changing the camshaft seals and crankshaft as it saves time and money

thw water pump stuff you need is here

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c15280215d73

The heater stuff is here

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c15280216054

Hope this helps! good luck!