How to Compression Test and find out if your engine is healthy

A healthy motor is the epitome of performance. Most engines I've seen underperform and there's a simple tool you can use to find out if your engine is doing well....the compression guage. Here's a simple "How to" video on doing a compression test which can be applied to any engine.

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[_zoid]

best video on compression tests. short and comprehensive. thanks man

[bharathshankar]

Thanks for the simple and easy explanation ☺️

[jvburnes]

Excellent description. Are the two cranking measurements similar to a dry/wet test?

[SpencerLowe-kgrg]

What am I doing in Automotive School?
Props to you

I think you should challenge the ASE/ITA exams if you want.

[tedjohnson]

Nice video! Interesting that the belt (and therefore cylinder 1) were on the driver side, as all the 4 cylinder cars I’m familiar with (VWs and Toyotas) have those on the passenger side.

[JReiid]

This engine looks very similar to the 7AFE in my 1998 Celica, very strange but also cool, being it’s in a Honda!

[rendiix]

My y8 had 170psi but after head gasket replacement the compression droped low 120 130psi

[ttautogarages]

I have a 2006 Mitsubishi Outlander. I do a diagnosed. An it said i need a camshaft possition. Sencor. But the engine. Light wasn't on. When a was driving. But it did shut rite off on the road.. A was thinking if i should do a compression test before. I buy a cam sensor.

[dinto_louis]

Hi, the wet reading on one of the cylinders is lower than dry reading..what could be the inference..?

I have done dry & wet compression test on my VW Polo 1.2 TDI..the reading is lower in the wet test than the dry test on cylinder number 3..?

Dry:
1 - 26.7 (Bar)
2 - 26.5
3 - 27.8

Wet:
1 - 27.6
2 - 26.7
3 - 26.3

[alexvieira]

Im scared to do it to my engine lol don't wana surprise lol

[jonathanguimond]

Does your engine is stock? If not what did you do on it?

[diogoreistv]

i have cilinder 1 at 180 only ... they Say i got to tune the valves now . since my engine got rebuild.

[ejswbradshaw]

Is 120psi low for a carolla 09 on all 4

[billwilliams]

GT CONTENT, why didn't you disconnect the ignition system to do a compression test?
I'm not sure why auto tech disconnect the ignition system to do a compression test

[gamex]

What is the thread size? Is the m18 on your tool?

[limamantapachitas]

Why you take two measurements, which is the valid the 4 cranks or the 12 cranks?

[ssalamri]

stuck new ka24de engine compression any one knows?

[yankee]

What's your opinion on the Subaru STI an the EJ? Is it a good project car?

[alonzocates]

So after you cranked it 4 times did you release the pressure and then crank it 12 times or do you crank 4 times then crank 12 times ? Thanks

[staresce]

After you warmed the car up to operating temperature, you turned the car off to remove the fuel pump fuse, spark plugs, and wires . can you do a compression test with a car that has a crank no start problem? Where it often will not completely start up at all?