I purchased a non Porsche thermostat. Compared it to the old Porsche one and returned it. The flow hole was smaller in diameter. These cars need all the cooling they can get. Bought a Porsche thermostat just like the old one.
Snap On tool will work well I am sure. I used a large pair of offset needle nose pliers ground to fit. Worked well.
Now am changing water pump. Getting thermostat out of pump on workbench is very easy. Hardest thing was loosening the crank shaft pulley bolt.
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