I don't have a diagram. Here are the steps.
1) disconnect negative battery wire..
2) remove serpentine belt
3) remove upper heater hose and thermostat housing; leave thermostat in place
4) remove plate from in front of the power steering pump, the lower bolt is one of three of the alternator bolts.
5) remove all 5 bolts from the PS pump bracket - 2 are by the thermostat housing. Remove the bracket.
6) move the PS pump off to the side out of your way.
7) Remove the long bolt from the alternator you can now see. There is one more alternator bolt at the top which will allow you to remove the idler pulley bracket with the serpentine tensioner. This idler bracket and the tensioner bracket are sizeable, so you have to understand the volume of stuff you are removing.
8) Unhook the alternator wire and with some patience, if you have any left, you can squeeze the alternator out.
This procedure assumes you have the ability to do the serpentine belt removal and refitting, and you will need 12mm sockets/wrenches to do the rest. The t-stat housing uses the torx head screws, so you need that as well.
Alternator, Replace -> With Air Conditioning -> Without Air Conditioning
Vehicle: 1998 Volvo S70 2.3 L5 GAS
With Air Conditioning
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