Is it better to drive the car around with the CRC in to get it up to temp or is it better to just start the car and let it warm-up. What's the pros/cons. I'm almost ready to add the CRC thats why I'm asking.

 

Let it warm up, then drive around for 20-30 minutes with the blockweld in, then park it and let it cool overnight. Next morning, drive it another 20-30 minutes, and park it and let cool.

I pretty much followed this procedure:

http://www.fd3s.net/o-ring_fix.html

Make sure to flush the system thoroughly after using the degreaser. It took me 4 good flushes before I felt comfortable that only water remained.

 

They say that if you don't follow those instructions EXACTLY, it won't work.

Dave