What's the best solvent for freeing up manifold heat control valves?
Acetone and trans fluid has been tossed out there for years.
I had one that was frozen up pretty good, I soaked it in PB Blaster for weeks, sprained it every day.
It would not rotate.
I ended up protecting the shaft ends and started tapping the shaft to the left then the right (just a little) over the next week I got it freeded up enough to rotate.
A couple weeks later I found the manifold had a crack (not from anything I did) so I ended up tossing it.
But I got it completely freedup.