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Old 15th November 2019, 16:36   #1
Rsnail
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Default Worn out flywheel?

Long story short, my car developed about half a year ago a ticking/tapping noise which got gradually worse, thought it was from one of the timing parts of the engine, replaced all 3 belts, all the pulleys, tensioners for both main and aux belt, and still nothing's changed, thought it would be the tappets, so I bought a mechanics stethoscope to closely listen to the engine and found out that it's something completely different, the sound was coming from the transmission. And since I've replaced the clutch kit about 10-15k miles ago the only logical explanation would be that now it was the flywheel that gave up, because that wasn't changed, I am thinking this because, as far as I know, when flywheels are slightly cracked or worn, they start making rattling or tapping noises which gradually increase. In my case, yesterday I found where the tapping is coming from, and guess what, today the clutch started slipping while IN GEAR and I started smelling that typical clutch smell. I'm writing this in uppercase letter because it should be noted that in only slips when the car is already in gear, but it shifts perfectly fine which leads me to think that the disk and other clutch parts are not worn.

My question is, is it possible that the almost new clutch disk has got premature wear because of the faulty flywheel making it needing to be replaced again? It would really suck opening the transmission and finding out that I have to replace that too even though new disk and pressure plate + master and slave cylinder were fitted 10-15k miles ago...
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Old 15th November 2019, 17:59   #2
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The dual mass clutch is an invention of the devil, and can give all sorts of problems.
They are far less reliable than the old fashioned clutches.
I have had dual clutch clutches fail after 2000km.
I will never buy a car with a DMF.
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Old 15th November 2019, 18:57   #3
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I thought the petrol engine cars had solid flywheels?
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Old 15th November 2019, 19:31   #4
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My 1.8L petrol has a dual mass flywheel! Original clutch plate was solid, no longer available, so now has clutch plate with springs. Very noticeable difference when changing gear.
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Old 15th November 2019, 19:41   #5
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You live and learn!
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Old 15th November 2019, 21:46   #6
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I also thought it was a single mass flywheel until I asked my mechanic that fitted the clutch kit 10-15k miles ago and he told me it's certainly a dual mass one, should've replaced that too... But still my question stands still, do you think that the disk worn out too in such a short time if the flywheel has been developing the ticking for the last half year and if today only it started slipping? I really cannot see how such a fresh clutch disk could possibly wear out so fast... But still, if I'd know I wouldn't ask.
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Old 20th November 2019, 10:25   #7
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Quote:
Originally Posted by Rsnail View Post
I'm starting to think that the misfire is happening because of the bad lifter/s that I have now for almost half a year, maybe the lifter on cylinder 5 wore so badly that the valve is not properly closing anymore, hence the misfire, any thoughts? Meanwhile I'm still waiting for the spark plugs to arrive, those would be the last "cheap" fix that could cure it, already swapped everything from one cylinder to another and still the misfire stays on nr 5...
Compression test will tell you.
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Old 20th November 2019, 10:32   #8
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But before opening the engine there is no possible way of knowing if it's actually bad lifters or bad piston rings or something else right?
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Old 20th November 2019, 10:38   #9
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But before opening the engine there is no possible way of knowing if it's actually bad lifters or bad piston rings or something else right?
Correct, but it will tell you that something is not right if the compression is low, or if the compression is good that the rings and valves are sealing.
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Old 20th November 2019, 12:35   #10
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Quite thought so. Although, as I said, I also have gasoline in my oil, it is obviously forced down in the oil pan by the piston rings, and regarding this, I know what I am saying is a far reach, but wouldn't it be logical that this is happening because the tappet on cyl 5 is either worn or blocked? Otherwise shouldn't the gasoline be thrown out the exhaust pipe? Now the only thing that comes out of the exhaust in comparison to before the misfiring is some white/greyish smoke.
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