Does just ordering a new heater control valve count?

thought after doing the oil pan and replacing/tightening all the clamps on the PS hoses I had all the leaks gone. Then late last summer I noticed a small spot drivers side mid engine showing up.... almost though one of the brand new motor mounts started leaking or something....
low coolant light came on and I decided I better take a closer look at things
leaking between the body and solenoids....
debated between the rebuild kit($24) and new($26) since its winter time I will put a new one in and rebuild the old one later this summer as a spare

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2004 X5(E53) 3.0L
1999 M3(E36)
2003 Z4(E85) 3.0L