[WANTED] Leak Down Tester
- Thread starter 1968dartman
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67Dart273
Well-Known Member
You can make one pretty easy........... A compression tester for the hoses and fittings, a gauge (and you can use the one on the compression gauge, and you don't need two) and a regulator. Drill a .040" hole for an orifice. Google it
homemade leak down..................
https://www.google.com/search?num=4...20.0....0...1c.1.26.hp..5.20.1717.xSAaz1zXsu4
One such project
http://www.hotrodders.com/forum/i-build-leak-down-tester-216698.html
In the drawing below, what they are calling the "damper valve" is the .040 orifice. For one gauge, you would disconnect the spark plug fitting, set the regulator for 100 psi on the gauge, and then plug the thing into the spark plug with the cylinder at TDC. 1/ the pressure is the leak, IE 80 psi is 20 %, 40 psi is 60 %, etc
homemade leak down..................
https://www.google.com/search?num=4...20.0....0...1c.1.26.hp..5.20.1717.xSAaz1zXsu4
One such project
http://www.hotrodders.com/forum/i-build-leak-down-tester-216698.html
In the drawing below, what they are calling the "damper valve" is the .040 orifice. For one gauge, you would disconnect the spark plug fitting, set the regulator for 100 psi on the gauge, and then plug the thing into the spark plug with the cylinder at TDC. 1/ the pressure is the leak, IE 80 psi is 20 %, 40 psi is 60 %, etc
fishy68
Tyr Fryr's Inc.
I can say by experience that the Harbor Freight ones aren't accurate. I bought one from HF, a 2 gauge model and one of the gauges was a 10 psi gauge, the other a 100 psi gauge. They should both be 100 psi gauges (to keep the math simple) in a 2 gauge arrangement. I replaced the gauges with known accurate gauges and it now works like it should. The homebrewed one is so simple it's the way I'd go if I were doing it again.
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