i just switched out a fan from a old parts car that I have on hand. Biggest problem I had was the 5th screw in the back by the little hose. It is hard to see and I had to go with feel to get the soccket head on to it.

This is a copy and paste of a post I found on Brickboard a while back, I don't know who posted it, so I can't credit them:

Go to the Parts Source and order a Siemens made replacement blower for a 1984 Chev Citation with the single power connection (I think the Chev with A/C had this config). The part # is: 14-7705-0 and the Siemens number is: PM-105.

The PM-105 motor assembly is identical to the OEM one and only cost $25CDN. You could ask for the Siemens made Volvo drop in replacement but the Part Source will charge you double.

Both of the Siemens motor assemblies are the same but the difference is that the fan cage comes with the Siemens made Volvo replacement. Not worth it if you can gingerly remove the cage off the OEM blower and reuse it.
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1990 740GL Wagon 228k AW70L B230F 8 Valve Non-Turbo Rex/Regina

Jorge,

Yes, it's an exact fit. It's actually a Simens motor now. It looked exactly the same as the Delco one that came out of my 1988 745. Maybe Volvo got them with better bearings or something- I don't know- but for $15 and a lifetime warranty what the heck.

You can reuse your 'cage' or buy a new one for extra $$. Clean the old one as best you can being careful to not disturb the metal balancing tabs.

The FAQ's has good info on the removeal/instlation. Be careful removing the plastic trim when getting to the ECU. That plastic cover (passenger foot piece)has tabs near the middle that mate with the ECU bracket. You need to somehow slide it straight back to not break these tabs. I guess- mine broke. Double sticky tape keeps it from rattling.

And don't forget the small hose that supplies cooling air to the motor.

Have fun,
chuck