The picture below shows two Coolant Reservoirs. The one on the left is from my son's 1984 760T. This Coolant Reservoir had been replaced once with one manufactured in 1986 (shown). It has been modified to include the float switch per the nice instructions in the 700/900 FAQ. This isn't the first 700 series reservoir I've seen with a broken plastic nipple. One last year cost the owner an engine and the installation.
The Coolant Reservoir on the right is from a 960. It comes with a float switch, and it is more robust. The plastic nipple is reinforced with a steel sleeve, and shouldn't break off like the 700 series one. The tank has internal reinforcement, too. I've had a 740 Coolant Reservoir crack.

I've installed the 960 Coolant Reservoirs on three of our cars, and will install them on two more. All you need is to remove the bracket from a 960 or 940 with this style reservoir. 940s reservoirs do not have the float switch and wiring.


Coolant Reservoirs wear out. If yours is old, check it by pulling hard on the hose nipple. Maybe you better have another reservoir on hand first. If this nipple breaks off, you could cost yourself an engine, just like Betsy did.
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john
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