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Leakdown Instructions

Leak Down testers are designed for checking leakage on engine cylinders. Also are ideal for leaking barrel valves on fuel injection

 
 Engine Cylinder Leakdown:

1) For most accurate results, engine should be up to operating temperture.

2) Remove all spark plugs.

3) Rotate crankshaft until piston being tested is at top dead center of compression stroke.

4) Screw the spark plug adaptor hose into spark plug hole making the sure the o-ring is seated properly.

5) Connect leakdown tester to a good source of compressed air, preferably a filtered and water trapped source.

6) Adjust the regulator on the leakdown tester so the the LEFT HAND GAUGE indicates 100 pounds.

7) Connect the spark plug adaptor hose to the coupler of the leakdown tester.

8) Read the leak down percentage on the RIGHT HAND GAUGE.

Fuel Injection Leakdown:
  1. Block off all injector lines & returns except for hat nozzles
  2. Connect dual gauge tester to outlet of compressor
  3. Set Air Compressor to read 100psi on 1st gauge
  4. Connect tester to inlet of barrel valve
  5. Read % on 2nd gauge

 

 

 

 

 

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