DIY compression test

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ABliss
Posts: 46
Joined: Sun Mar 04, 2018 7:00 pm
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

DIY compression test

Post by ABliss » Tue Dec 03, 2019 8:48 pm

Hi all,

I'm looking into a compression test kit so I can perform the test myself.
Procesdure is fairly straight forward:
- Warm engine
- Remove all four spark plugs
- Isolate ignition system
- Thread in compression tester into spark plug one
- Hop into driver seat, crank about 4-5 times or until till gauge stops rising
- Move onto cylinder two

Question is, what is the best way to isolate ignition system? Take the fuse out?

Also, anyone tried this and what kit did you buy?


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gloucester
Posts: 1837
Joined: Sun Apr 03, 2016 7:04 am
Location: Gloucestershire, England
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Re: DIY compression test

Post by gloucester » Wed Dec 04, 2019 8:52 am

Haven't a clue

https://www.popularmechanics.com/cars/how-to/a8520/cars-101-how-to-do-a-compression-test-14912158/ suggests:

STEP 1 Remove the fuel pump and fuel-injection fuses. Disconnect the main wire to the coil and spark plug wires; remove spark plugs.
(2015 Nissan Qashqai Tekna DIG-T 1.2 sold 15/6/18) ~ 2018 Suzuki Ignis SZ5 - 2018 Yamaha MT-07


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calnorth
Posts: 671
Joined: Mon Feb 11, 2019 2:01 pm
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–present)

Re: DIY compression test

Post by calnorth » Wed Dec 04, 2019 9:01 am

Remove plugs from each ignition coil. Keep away from cylinders. Couple of turns on starter for each cylinder.

Used to do it on other cars and hoped the pressure tester was accurate enough.
Thankfully unbusy (retired)
Mk2 Qashqai Facelift - J11b (2017–present)
1.6 Dig-T N-Connecta


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