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Photo DIY- Engine Leakdown Testing

3928 Views 3 Replies 2 Participants Last post by  G-AMG, 
G-AMG
10
100% Un-Needed, given the Normal Compression Testing Results. But, with the Plugs already removed? Only an extra few minutes of testing.

I admit, this is *ONLY* for my own Curiosity, and to Trend any results.

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G-AMG
part 2

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What is being measure if not compression?
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G-AMG
wanderfalke said:
What is being measure if not compression?
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It is kinda' like the Opposite of Compression testing.

Compression testing has the Piston/Cylinder/Ring complex pushing air *OUT* of the Combustion Chamber, while Leak-Down Testing Pumps Air *INTO* the combustion chamber, checking to see if any of that Air "Leaks" out into the Coolant (aka Head Gasket Leak), or Leaks into the CrankCase (Leaking around the Rings), or A leak around the Intake/Exhaust Valves (with subsequent Hissing noise in the Intake manifold area or out the exhaust pipe, respectively.)
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