Nathan - From what I've read, the "Schrader valve" in an engine compression tester is noted to be a "low tension" unit. Different than non-tester valves. They seem to be carried by various vendors on-line.

An example would be Box of 5 Milton Deluxe Compression Tester replacement valve cores OR Lisle Compression Tester Replacement Parts 20100 (order by each)*

* Look up your tester Brand/Model to see if you can find a specific replacement product.


~ Dan
1951 Chevy 3 window 3100
Follow this story in the DITY Gallery
"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)