You should change the spring as well. Shortly after I did my first shock, the spring went to bouncy heaven.

If that spring goes, you can't drive the car.

Yes, changing the spring is an excellent idea and save the old one for a spare left in the trunk just in case, along with a spare belt.

Also, you might have taken a couple of threads off the end of that bolt while it was out so that next time you would not have to loosen the pulley to get it out. Those shocks only last a couple of years.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz