How To Spot Failed Clutch Parts

by birtanpublished on September 8, 2020

Brian's mobile one this gnarly looking piece of art is actually some genius invention and it's an endangered species all at the same time save the manuals you don't see many manual transmission cars nowadays they say that manual transmissions like an anti-theft device

Cause more aniele's alone oh how to drive it this should be of interest to folks this is actually a clutch in almost all of its entirety the only thing that's missing is the part that pushes on here which would be the slave

Cylinder and master cylinder this is how they work this is a fork and it works like a lever and a fulcrum this being the fulcrum so this lever pushes on these levers to let go of a spring-loaded plate that's binding down

This is a fake plastic input shaft like what you defined on a manual transmission and inside at the back end of that it fits into a little bearing that bearing is a pilot bearing there's the end of the little putt is called a

Pilot tool it basically helps get the input shaft resting in a little nestled thing in the crankshaft on the back of an engine crankshaft turns the flywheel the flywheel is where the teeth are this is actually teeth to engage with the

Starter to turn the crankshaft to get the engine started the clutch itself the part that wears out typically is either going to be the throw out bearing you can see that this moves a little bit this is all going to become pretty clear

Here in a minute this has to push down on these levers but these levers are turning upwards of eight hundred thousand rpm at idle to seven thousand rpm when it's really revved up when we flip this up we can see the Oreo cookie

Effect so there's that little bearing that goes in the end of the crankshaft and the pilot tool goes into is the pilot bearing you can see this is the clutch disc it's kind of like a brake pad you know like what you'd find on a

Car only it just faces both ways and instead of having a caliper or something this is what does all the squeezing this is a spring here there's three little strips of metal that are causing the inner part this plate to push down

If you squeeze probably not strong enough by hand but if you squeeze this on there either by tightening the bolts that attach it

Time Warp the phone rang I answered it I got called out on something and I forgot to film the rest of it and that clutch is now installed in the vehicle however I do have the cutaway still kicking around I cut it open

I'm going to show you all the things that can fail in a clutch and things that you should address one of which is a rear main seal while you're in there while you have the flywheel off it's a good idea to replace it the way to tell

A bad one is they just get stiff and once their stuff they don't seal as well I'm bearing it's really dry here the balls is rather than where the clutch fork failed like everything failed on this at the same time the fulcrum also

It's got a lot of wear on it they're back to how it works though here's the flywheel you notice it's the foil because at the teeth like I said starter engages with that on manual transmission you'll have a

Flywheel like this one and on an automatic transmission you will have a flex plate is what they call it as skinnier but you see the bolt pattern that you have here this is for Toyota four-runner 1994 and this is for a 2008

Subaru Legacy outback you see it's a similar bolt pattern I think that counts the same this is a 8 pattern and this also is 8 you'll notice that this has different bolt holes so that you can put on the pressure plate this has just four

Bolt holes some will have three so I'll have five to bolt on a torque converter you'll see the little circle where marks here you usually get to this through the starter opening the torque converter will actually have the ring gear on it

You can actually take these on and off by heating them the way that they do it is it's not actually welded do you see a little crack right there you heat this up with a torch and you can pop it off and then you heat it to put it back on

To the next one they're just a fit by expansion contraction being hot or not the reason why this one doesn't have to weigh as much is because the torque converter is FD it weighs a lot on its own so you don't have to worry about

That this is the disc this is normally the part that fails usually if you have a good disc see in this ones fail you see where the lines that are going here and it's getting close to the rivets this

Isn't too too bad but it does also have a little bit of a lip here you can see just like a brake rotor will get says brake bad material on both sides it's got Springs that help to absorb some of the shock so that you don't stall the

Vehicle but what can happen is if these get too skinny and the clamping force that comes from the springs and everything that are on the pressure plate bolted on to the flywheel they can't squeeze the disc well enough and

It'll slip and what that looks like well that feels like from the driver's seat is when you wrap it up the RPMs go up but it doesn't move you watch your speedometer just kind of going slow and the RPMs are high and your clutches out

And you're like oh so that's what a worn-out clutch disc looks like if you ride the clutch meaning that you rest your foot on the clutch pedal all the time and what that does is that causes this to be in contact with that

And wear it out throw out bearing against the pressure plate so it will cause a shorter lifespan of this but it'll also take a little bit of clamping force away from the pressure plate and that causes this to be sliding and

Grinding and wearing on both the flywheel and on the pressure plate and that can cause your clutch to wear out prematurely for us to get thin and for this to wear out this is a flywheel and it also failed

There's some cracks in it zooming in so you can see those so you can see on the surface there's a whole bunch of the surface cracking and you also see a bunch of hot spots where it's turning blue you'll see the same thing on the

Bottom side of the pressure plate so I take the pressure plate in and you see these hot spots these cause for an uneven surface or it's not smooth it's not consistent anymore and that leads us to the throg bearing throwout banging on

This was actually pretty dry too so you can kind of see and hear what's the problem with this and again this just works on the fingers of the clutch pressure plate so the pressure plate holds the disc down and it uses a spring

Force they take contact these are those Springs that I've shown you earlier it's got three layers of spring steels on it just basically pushes down when you push down on this and you see how tore up these teeth got

Because the throg bearing was so dry I think this actually seasoned up and then freed up again when you push these down it raises up on them like that and when that happens instead of being locked on there see how this little Ivan thing

Goes you've got two bolts that go in there so when you push down on that instead of being crushed in the middle like you see here it lets up off of it and this can turn freely it's just because of the cutting it's rough and

This is not any way this can move freely and then your engine rotation is no longer yeah you know hooked into there so these can fail because these teeth can fail the springs can fail you can get hot spots on them any of those

Things will wear out a pressure plate Springs wear out over time so when you buy a clutch kit you get a new pressure plate a new disc a new throw out bearing a new pilot bearing and you get the whole thing a Lube that goes on the

Input shaft I just wanted to get this video done this is gonna be a wild card Wednesday video Sunday I'll have a video about replacing the clutch and what the symptoms are if you have a all blown through your clutch fork so

That should be pretty fun I'll give close-ups of like the panel like the clutch pedal what it feels like we're gonna push it on it with a bad bearing in a bad clutch pedal you push on this it's really bumpy you can feel it not so

Much see it anyway stay tuned thanks for watching Cheers thanks for watching be sure to click like and subscribe

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