https://youtu.be/qeWP75IKYfc
any idea what the higher pitched noise is?
2015 mirage hatchback 70k miles. the main belt is taught and not cracked or rotted.
Update: Fixed!
https://youtu.be/qeWP75IKYfc
any idea what the higher pitched noise is?
2015 mirage hatchback 70k miles. the main belt is taught and not cracked or rotted.
Update: Fixed!
Last edited by Eggman; 08-20-2019 at 08:46 AM. Reason: Added solution
Ask Fummins. He's a huge help around here.
Hello benwerks and welcome to the forum.
I can't say I've heard a noise like that out of my 2015. Is sure sounds like the accessory belt. At least that sound is isolated to the engine and there is no need to wonder if it is related to any other part of the drivetrain. Your engine turned over fast, so I rather doubt it's a failing battery - one that would put a strain on an alternator.
So, when did you first notice this? What other checks have you made? How is your A/C? I'm guessing you have a CVT? Feel free to make a forum Garage entry. The link can be found to the left-hand column next to your post.
Garage empty: add car
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View my fuel log 2015 Mirage ES 1.2 manual: 49.6 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.5 mpg (Imp)
To me it sounds like the timing chain being a little tighter than usual. Nothing to worry about!
The chain has its own little tensioner with a built-in sort of ratchet to prevent it retracting without oil pressure. Initially the oil pressure pushes the tensioner piston firmly forward and tensions the chain. To prevent a loose-chain-noise on start-up happening before oil pressure has been achieved, the tensioner piston has a simple ratchet-type mechanism that rests in one of several parallel grooves on the side of the piston. With normal chain wear, the tensioner piston moves outwards a little bit more to compensate the now longer chain and keep up its tension.
Maybe the tensioner has just moved a groove further out than before, resulting in a somewhat tighter chain producing that noise. Nothing to worry about at all, totally normal.
You can easily check it on a cold engine by taking off the oil-filler cap and pressing onto the chain with a finger. It will feel tight, not the least loose at all.
In time normal wear will lengthen the chain and that noise will disappear. If you would then press on that chain, you would feel it being a tiny bit loose. In time, the tensioner will go another groove forward to compensate wear, and the same will happen again.
We can be truly happy our cars have that anti-return mechanism. I had a Nissan that did not have that feature, and the grating noise of the chain during and shortly after startup sounded absolutely frightening.
Last edited by foama; 08-14-2019 at 12:58 PM.
Eggman (08-14-2019)
I haven't heard that one on a Mirage before. Almost sounds like an old ford power steering pump. Hopefully foama is right.
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)
Check the accessory belt tensioner. A failing bearing there could make a noise like that.
Simplify and add lightness.
I'll prolly get flack for this but, don't run premium in a regular octane car.
I've had my Mirage 5.5 years, it's a 2014, I never sampled with premium gas, always get 43 MPG-- no issues. Motor purrs like a kitten. Experiments like this, well, cars are too expensive. I don't got no extra money.
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View my fuel log 2014 Mirage ES 1.2 manual: 42.2 mpg (US) ... 17.9 km/L ... 5.6 L/100 km ... 50.7 mpg (Imp)