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The 89 240 received a majot tune up totay including water pump, FPR, O2 sensor, throttle body cleaning and electric fan conversion. The water pump was making a knocking noise ever since we bought the car 3 months ago. Mechanic told the previous owner that it was rod knock. Wrong! I found about 1/4 inch of play in every direction when I pulled on the clutch fan.
I was going to use a GM FWD electric fan but when I found the 940 fan with relay for $24 I just had to have it. After some careful cuting it fit like a glove and looks stock. This left so much room between the engine and the fan that now I can work on the belts, tensioners harmonic balancer without having to remove the gigantic shroud and fan or the plastic cover under the engine. I was even able to install the new water pump with the electric fan already in place.
With the electric fan the engine is much quieter inside and out side the cabin. Despite what some would have you believe, I did feel a major difference in acceleration. I highly recomend this modification to any 240 owner.
This is the fan switch. The 940 fan is ground switched. The switch is mounted in a hose adaptor from a 1980s Saab 900. The Saab used a 110/115 switch in the upper hose. I used a new 87/92 switch in the lower hose. This switch activates high speed. The low speed is switched by the AC compressor clutch.
Looks stock
Before
After. The only proper way to clean the TB is to disassemble it completely. Then I had some fun with the Dremel.
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