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Cylinder Leak Down Test

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For more insider auto repair tips that can save you time in the garage, visit Garage Gurus fmgaragegurus.com.
Air leaking out of a cylinder can be an indicator of a variety of engine problems. To pinpoint the source of the issue, perform a cylinder leak down test. In this video, Master Technician Mark Kenyon of Garage Gurus guides you step-by-step through this important diagnostic test.
Mark shows the proper technique for attaching the test hose and cylinder leakage tester and what to listen for when doing this test. Count on Garage Gurus to help you get your vehicle repair done right.
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Опубликовано:

21 авг 2024

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Комментарии : 30

@larrygibbons6489 3 года назад

I’ve watched several other leak down test videos but when I watched this one I finally understand how the test works. EXCELLENT INSTRUCTIONAL VIDEO !!!

@ericm6519 18 дней назад

Super helpful video and everything clearly explained. Thanks!!

@clomputech 2 года назад

I have been looking for information about this and after several confusing videos, this one finally helped me to understand how it works. Thanks 👍

@andrewbowser2794 4 года назад

Hey Mark, took your Ignition course in Pittsburgh. Just want to say awesome video and tech tip. You and all the Garage Gurus are literally that - Gurus! Thank you for all the valuable knowledge 👍

@Flip2Flower1 3 года назад

Best video of this topic on RU-vid

@japfourme381 11 месяцев назад

I use the balloon method to determine when the pistons on its compression stroke.

@wcjcnc 4 года назад

Wow, someone that actually knows how to perform a cylinder leak down test. Almost every video on RU-vid is WRONG. It’s nice to see someone do it right. Thank you.

@zano9291 2 года назад

Woah, I saw you from the snap on red leak down tester video. I can now test my mower properly thanks to people like you and Mark🤝🏼

@curtiswagner834 10 месяцев назад

Excellent....clear and to the point.

@chrisF351 3 года назад

Thanks for the sharing the vid, very informative 👍👍

@Dnasty1 26 дней назад

Why would the engine spin because of the ratchet? I am sorry if this is a stupid question I want to perform this test but have never done it before.

@MlunguG 3 года назад

Thank you, very informative

@tractor629 6 месяцев назад

Awesome video!!

@puremayhemFTW Год назад

If you have good compression from compression test then does that mean you wouldn’t need to do a leak down test?

@mpaxton6686 10 месяцев назад

You still should in many cases. A compression test confirms if the cylinder builds compression, a leak down test shows if it holds that compression pressure.

@khaniftikhar9225 9 месяцев назад

Very helpful demon stration thanks alot

@nelsonruiz6116 7 месяцев назад

Buen video exelente explicacion A todos los motores se les puede aplicar 100 psi ? Gracias x su respuesta

@eduardo_ro 7 месяцев назад

@renejacques8288 8 месяцев назад

If you started at 90psi in the inlet, how does it go up to 92 percent, if anything it should go down; right? I don't understand how it's a 5-6% leakage. Please clarify.

@patrickdubuc3439 2 года назад

Do u have to disconnect the upper radiator hose to do this test?

@jeffmockus5400 6 месяцев назад

Nah. Bubbling through the radiator would tell the same thing

@timchruch881 11 месяцев назад

I have a 4 cylinder in my car. Would I need to check all 4 and if so do I take out one plug at a time or take all 4 out then do the test?

@ese3v 4 месяца назад

1 at a time

@joseortez4110 Год назад

What about if you hear air from the oil cap ?

@Touring_Low Год назад

Piston rings

@scottwooster4102 3 года назад

At TDC is the air puff coming out of the hose strong? I need to do this on a 351 Windsor. Never done it before but I have the tester.

@jduda1127 3 года назад

Tdc marks should be located on the crank itself. However you can put a balloon on top the hose to watch it blow up then you'll know your close. Hope that helps.

@pauldahlke4921 3 года назад

What about middle and bottom Dead center? The only reason why I say that is because taper in the cylinder wall ?

@dsan94 3 года назад

Taper occurs at the top of the cylinder

@SoldouttotheTruth Год назад

So basically if I am wanting to buy a used car, and I went to a supposed mechanic, I don't want this test done. Because if the person is pretending they are a Mechanic, they will damage what may have been a good engine!