Just a chime in here in case you hadn't checked yet. Here is just a sample of many available "engine leak down tester" available (not mine nor can I vouch for if this one as a good value or not) at an inexpensive price should you decide to do the testing yourself:
Perhaps others will come along and add their wisdom???
See below pics for my "old school engine tester" found amongst the boxes of spare parts and tools I got along with my Grandfather's '51 many years ago.
Dan
~ 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)
