What Is Engine Compression (and a Compression Test)?
Compression is a key measure of engine health. A Cranbourne West specialist explains.
What it is & what it does
Compression is how tightly each cylinder squeezes the air/fuel mixture before ignition — it’s essential for power and smooth running. Healthy, even compression across cylinders means a healthy engine bottom/top end.
Low or uneven compression points to worn rings, valves or a head-gasket issue.
Signs of trouble & how we help
Symptoms of low compression include misfires, power loss, hard starting, and excessive oil use or smoke. A compression (or leak-down) test measures each cylinder to locate the problem.
We perform compression and leak-down testing to assess engine health — useful before a big repair or buying a used car.
Questions about your car? Just ask.
Understanding what’s under the bonnet makes servicing decisions easier — and we’re always happy to explain what your car needs and why, in plain English.
Book a service or a check with a Cranbourne West specialist online in 60 seconds, or call 03 8782 0711.
What Is Engine Compression (and a Compression Test)? — FAQ
How tightly each cylinder squeezes the mixture before ignition — key to power and smoothness.
Misfires, power loss, hard starting, and excess oil use or smoke.
A measurement of each cylinder’s compression to locate worn rings, valves or a head-gasket issue.
It’s a great health check — we can do it as part of a pre-purchase inspection.
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