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01-20-2020, 03:01 PM | #1 |
Senior Member
Join Date: Jan 2014
Location: Leo, Indiana
Posts: 235
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Leak Down tester issue?
Help my first time doing leak down testing, I think there is a problem with a borrowed gauge.
When I set the percent gauge to zero the pressure gauge showed 32 lbs. If I tried to increase the input pressure, the % gauge would swing clockwise out of the setting range. Doing the test using the 32 lbs the leak down % on the #1 cylinder was 5%. Now sure if things are ok, Compressor putting out 100#. IMG_0319.jpg 60098958536__B3A2EDD6-9A3D-448A-B277-B0CEEF00606B.jpg Last edited by callbald; 01-20-2020 at 03:10 PM. Reason: changing pictures |
01-20-2020, 05:57 PM | #2 |
Senior Member
Join Date: Jun 2010
Location: Detroit suburb, MI
Posts: 3,698
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Re: Leak Down tester issue?
5% is considered good. You can also hear where the leakage is going by listening at the oil fill cap opening, the intake, or the tailpipe. Also bubbling in the radiator if it's a head gasket or crack.
Sal |
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01-21-2020, 02:19 PM | #3 |
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Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,420
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Re: Leak Down tester issue?
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If it's leaking pretty bad then a person can listen at the exhaust or intake to see if a valve is leaking. If it pressures up the engine venting then it's going past the rings. This can be due to aligned ring gaps at times so I always run the engine and check the low one again to see if it improves. If you squirt oil in the cylinder and turn it though, you will have an improved reading if the rings are worn. With that percent gauge, I would pressure up an air bomb and see what the thing reads at the pressure I use to check it and see if it is accurate. I have my tester gauges calibrated ones a year to make sure they show proper and equal pressures. |
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