First, THANKS, it is always appreciated when any info on how-to's are made. Second, what does the SW stand for? And lastly, I've had a 180 thermo for some time and it's very effective but why would I need to change the sender, and how would I know if it's bad?

Side note, make sure the antifreeze is safe for aluminum, I think it has to say phosphate-free.


1992 Ford Escort LX-E -Tracer LTS spoiler -GT Grille