Can't find tensioner and how to loosen belt to change alternator in 97 ford aerostar mini van

Question edited for clarity.
Question moved to model category.

The PCV (positive crankcase ventilation) Valve is shown in the bottom link. Also click the images tab. It is already answered on Fixya.

Where is the pcv valve in a 1997 ford aerostar van

Fixya https://www.fixya.com > ... > Ford > Aerostar
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HELP PLEASE 97 FORD AEROSTAR PVC VALVE

Ford-Trucks.com https://www.ford-trucks.com > forums > 1499617-hel...

Jul 18, 2017 - I have been searching the internet for days without any luck just to try and locate my PVC VALVE so it will pass smog.

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Link

https://www.google.com/search?q=1997+Ford+Aerostar+van.+Location+of+PCV+valve

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u don't loosen it all u have to do is to use half inch drive rachet hook it in to center of tension wheel and push or pull it will move so that you can put new belt on

there should be a screw on the alternator which loosens and tightens belt

It has a belt tensioner. On the tensioner should be a nut put wrench on and push counter clockwise and it should loosen the belt. Good Luck

disconnect the positive terminal from battery. loosen belt tensioner to loosen belt. remove harness connection and bolts. remove old alternator, put new one in place. put bolts back on. tighten bolts. plug in harness. put belt back into tensioner, pull it tight so there is very little play in blelt and tighten. reconnect the battery.

This is for a 1999 1.8 Diesel 55 Escort Van.

You have to remove a few parts but its not a major dilema. Almost all work needs to be carried out from under the van, so it needs jacking up.

1. Disconnect battery. Loosen bolts on FR wheel, jack up high and take wheel off. MAKE SURE HANDBRAKE IS ON AND WORKING!!!

2. Inside the wheel arch is a cover that goes over the alternator, three bolts to remove.

3. From under the van you will see a tension wheel keeping the belt tight. It requires a star shaped fitting to loosen, if you dont have one you can use a small ratchet piece that grips it.

4. Once belt is loose remove the two nuts holding the tension wheel in place. Keep to one side and remember how it goes back.

5. You now have access to the three bolts holding the alternator in place. Its tight and a little tricky but persevere and they will come out.

6. Wiggle the old unit out, unbolt the two wires on the alternator, bolt back onto the new unit.

7. Do the rest in reverse. When putting tension back on the belt do not over tighten, belt should just feel firm.

Remember to connect the battery again! And use a volt meter to test battery. You should get around 14v with engine running.

Done.

Belt Installation — Aerostar 3.0L
Belt Installation — Aerostar 4.0L

Hope this helps you.

This is from the workshop manual, direct quote.

Generator, Aerostar
Removal
1. Disconnect battery ground cable (14301).
2. Remove snow/ice shield.
3. Remove engine air cleaner intake tube (9A624).
4. Disconnect generator wiring at the voltage regulator (VR) (10316).
5. Remove attaching nut and wire from generator (GEN) (10346) output terminal.
6. Remove wiring connector bracket.
7. Loosen the drive belt tensioner (6B209) and remove the drive belt (8620).
8. Remove generator brace (10B315) and bolt attaching generator to drive belt tensioner bracket.
9. Remove generator from the generator mounting bracket (10153).
Installation
1. Position generator on the generator mounting bracket.
2. Install the attaching bolts and tighten to 40-54 Nm (30-40 lb-ft).
3. Install the drive belt over generator pulley (10344).
4. Adjust the drive belt tensioner as outlined in Section 03-05.
5. Install wiring terminal and attaching nut on generator output terminal.
6. Install wiring connector bracket.
7. Install engine air cleaner intake tube.
8. Install snow/ice shield.

need to make sure the is no bad cell in the battery and the post are clean and also check the drive belt for cracks and if its be over 40,000 miles change it cause it maybe slipping also have the starter tested.

u dont loosen pully there is a place on belt tensioner you put breaker bar, ratchet,or belt tool in to pull tensioner back to remove belt