C-Clamp to replace tire valve stem

[thewhitenight000]

Can I use a C-Clamp to break the bead on the tire? I think my valve stem is leaking very slowly using a soapy water method. I don’t know how much it will cost to replace it so I want to do it myself. I have an 8” clamp that will fit over the tires (175/65/R15? stock). Have you guys had an experience with this or heard stories? Otherwise, how much would it cost to replace one? Thanks.

[The Nun]

Ive known tyre replacement companies of the quicker fitting variety replace a valve for free if you give them the nudge and a wink to say you will be in there for new tyres shortly.
Ive had one done for free, worth a try??

To break the bead on a tyre they only use a pneumatic clamp that presses down on the tyre edge to break the bead so I suppose you could achieve the same result with a G clamp with care but you'll need a high pressure air supply to blow the tyre back up to pop it back in place afterwards, Plus if the tyre moves it will probably need rebalancing too.