A/C Valve Core Tool
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 1,008
Likes: 57
From: Kensington MD
A/C Valve Core Tool
Anyone know of a valve core removal tool (ideally a no-discharge model) that works with the C5 high side valve? I have the Mastercool 81490, but it doesn't work on that valve—the tip is too small to fit on the valve, and the bore of the tool is too narrow as well. The Mastercool 58490 is $400! 
Drifting
Joined: May 2008
Posts: 1,695
Likes: 491
From: Denver, NC
Anyone know of a valve core removal tool (ideally a no-discharge model) that works with the C5 high side valve? I have the Mastercool 81490, but it doesn't work on that valve—the tip is too small to fit on the valve, and the bore of the tool is too narrow as well. The Mastercool 58490 is $400!
Googling Mastercool 58490 returned many sub $150 results.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
