5609

Cylinder Leakdown Tester Kit

Quickly diagnose internal engine problems such as bad rings, valves and leaking head gaskets by measuring engine leak down

Kit comes complete with adapters for most applications.

Features and benefits:

Dual 2-1/2" gauges feature chrome bezel and rugged protective outer boot.

Scales read 0-100 psi and 0-700 kPa.

Pressure regulated manifold includes quick couplers.

Long flex 24" 14 mm hose.

10 mm, 12 mm and 18 mm thread adapters.

Blow molded hard case with removable lid.

Detailed instruction chart.

No engine will have perfect sealing with 0 percent loss. Five to 10 percent loss indicates an engine in great to good running order. An engine between 10 and 20 percent can still run OK, but it’ll be time to keep an eye (or ear) on things. Above 20 percent loss and it may be time for a rebuild. Thirty percent is a major problems. The percent of leakage should also be consistent across the cylinders. Any great differences indicate a problem in that cylinder.
Beyond getting an overall picture of engine condition, the engine leakdown test is an excellent way to pinpoint where problems are before tearing down the engine. Listening for where the air is escaping by ear can isolate the problem.
    •    Intake valve : Air whistling out of the intake, carburetor or throttle body indicates a leak at the intake valve.
    •    Exhaust valve : Air heard hissing out of the tailpipe, turbocharger or exhaust manifold means an exhaust valve leak.
    •    Piston rings : Whistling or hissing out of the PCV valve, oil filler cap hole or dipstick tube means the air is pushing past the rings. Suspect ring or cylinder wall wear.
    •    Head gasket : Air bubbles in engine coolant seen at the radiator filler cap could mean air escaping into the coolant past the head gasket.
    •    Cracked cylinder head : Bubbles in coolant or coolant being pushed up out of the radiator neck can also indicate cracks in the cylinder head or cylinder walls.