How to add fluid to Gaffrig Monster liquid speedo
 

Can this be done, what type of fluid?
Thanks

It's glyserin I believe. You can get it at any drug store. To add fluid all you have to do is remove the guage from the dash, hold the guage flat (face up), unscrew the dezel, lift it off and add fluid.

My old one was leaking, I was able to simply tighten the bezel a little bit, that took care of my leak on a 10 year old guage. You may need to get a new O ring from Gaffrig.

Make sure it is warm when you do it. Otherwise as it gets warmer, the bubble gets larger. If you can do the repair in the sun that is your best bet.

Jon