Plug Coupler
Plug Coupler
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 100BNC Male to Male Coaxial Coupler Connector PlugBMM  US $99.00
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 40BNC Male to Male Coaxial Coupler Connector PlugBMM US $78.00
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 20BNC Male to Male Coaxial Coupler Connector PlugBMM US $39.00
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 4BNC Male to Male Coaxial Coupler Connector PlugBMM US $9.99
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 BNC Male to Male Coaxial Coupler Connector PlugBMM US $2.99
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Internal Combustion Engine Cylinder Leakage Testers
Cylinder leakage testers are useful tools for a home or professional mechanic, used to diagnose certain problems with an internal combustion engine including bad valves, rings, leaking head gaskets and other malfunctions. Sometimes called a leak-down tester, leakage testers are quite simple really, and work by introducing compressed air into a sealed engine block and measuring how much of it leaks out.
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This tool generally supplements a compression test kit which gauges to what degree the engine is pressurised. The cylinder leakage tester does not tell you the actual internal pressure of the engine, only how much air is leaking. If there is a big leak, the tool also does not tell you exactly the cause. To introduce compressed air into the engine through the leakage tester, you need a standard shop air compressor and pneumatic hose.
Automotive leakage testers consist primarily of a pressure-regulated manifold attached to dual chrome-bezeled gauges. Pressure is measured in kPa or kilopascals. Other kit components include flexible hoses, quick couplers for connecting the hoses to the compressor and threaded adapters of various size for accommodating engines of different size.
An air compressor hose is connected to the input end with a coupler. On the bottom of the manifold is an adjustable dial that lets you artificially set the pressure coming in. A second hose connects to the engine by being guided into a spark plug hole. To the output end of the manifold connects this second hose. The first gauge indicates the optimal pressure, while the second gauge shows you the pressure passing by it. So if the first gauge is arbitrarily set to 100, and the second gauge reads 85, you know that 15 percent of the compressed air is leaking.
You still have to diagnose and solve the problem once you have pressure tested the engine. Engines are rarely, if ever, perfectly pressurised. A loss of up to 20 percent compression is nothing to worry about in most cases. You may, however, have a major problem on your hands should the loss of pressure exceed that amount.
Plugs : 3-phase+Neutral+Earth plug & coupler, 16A to BS EN 60309-2