Jump to content
SAU Community

Recommended Posts

Hi clutch gurus!!

I was wondering if you could take a look at my clutch / flywheel / throw bearing and tell me if it requires replacing? The clutch plate looks like its still got a lot of meat left on it (I am no expert), and the flywheel seems pretty smooth although it does have some markings on it. The throw bearing its self was noisy before it removed the clutch, at one stage I couldn't even get it into gear unless the engine was off.

A little back ground info also; I have only had the car around 1200 km's and I am not sure when the clutch was replaced, the previous owner did say he changed it "recently". I have done one burn out in it (fairly decent one). The next time I tried to do one it wouldn't even spin the wheels. I am not sure if the throw bearing was noisy prior to these burn outs.

Is the clutch / flywheel salvageable and just change the throw bearing, or is she kaput and spend the cash now?

post-133680-0-78772400-1409285259_thumb.jpg

post-133680-0-88077600-1409285294_thumb.jpg

post-133680-0-05579900-1409285326_thumb.jpg

post-133680-0-09923300-1409285381_thumb.jpg

post-133680-0-78131800-1409285412_thumb.jpg

post-133680-0-48346100-1409285449_thumb.jpg

post-133680-0-14261500-1409285489_thumb.jpg

post-133680-0-28100900-1409285536_thumb.jpg

post-133680-0-43974900-1409285571_thumb.jpg

post-133680-0-16235300-1409285640_thumb.jpg

Youtube video of the throw bearing in action

Edited by Sm3g

yep, clutches don't just slip because they are worn.

They also slip if they get too hot (probably what happened here) or if you have too much torque for the clamping pressure.

BTW if the thrust bearing was noisy change it while it's all apart. cheap and quick fix when it's opened up

Also can happen if you have an oil or coolant leak in the rear section of the engine. That one is a bit more obvious though, you would probably see something if there was a leak, but if not check the welsch plugs at the back of the block for any signs of leaks

The flywheel doesnt look like its got terribly hot, but hard to say for sure from photos.

How much power does the car make? It looks like an Exedy HD clutch, which might not take an awful lot of power over stock.

When is the clutch slipping BTW?

There is a lot of black dust in the bell housing and on the clutch its self. The flywheel does look like its got a lot of heat marks on it, not so much on the GB side of the clutch but the engine side for sure. The last dyno was about 4 years ago and it said it was pulling 250 kW at wheels.

After the first burn out, I did a service on it (changed GB oil, Diff oil, engine oil/filter, yet to change fuel filter till i change my lines). After the service it wouldn't get back into gear while the engine was running, so I stressed for a couple of days researching and went back out and it started working again. I took it for a small lap around the block being uber cautious not reving high at all, so I'm not sure if it was slipping at high power out put whilst moving. Prior to the first burnout it was not slipping at all. After this I was about to take the clutch out and inspect so I decided to drop another burn out, this time it wouldn't grab at all (no wheel spin) on already baldish tyres.

Well had two wins today...

Exedy got back to me with this;

The 25017 Pressure Plate is our Sports Cover Part No NC-11T

The Plate we use under this cover is a Sports Plate ND-20H

The Bearing is a pull Type Part No Brg-601

If you purchase a NSK-7172SO you would have all components listed above

The NSD-140U IS A 350Z Plate

The NSK-7172SO kit would cater for 275 Kw at the wheels

Not sure why a 350Z plate is on the skyline but any way I will stick with it for now, just got a bearing and alignment tool from http://www.cbaus.com.au for $75, they were the only ones to have the part on site and also the cheapest (Perth).

  • 1 month later...

Good news!! Got the gear box back in with the new bearing and it works perfect!

I put the failure down to hardened grease on the input shaft of the gear box not letting the bearing slide back in swiftly.

I cleaned up the flywheel with dry scotch bright (green scour) to get rid of some heat spots and general muck off them. Also removed all dust and old caked grease off everything.

When I installed the clutch/box back in I didn't put any grease on anything.

The clutch grabs and releases like it should now, no slipping or noise.

It even looses some traction when dropping the clutch into 3rd, mind you the tyres are a tad worn (50%) and the surface was fairly smooth.

All in all glad I tried the bearing first and cleaned it up rather than spending 1-2k on a new clutch straight away.

Thanks for all the help to people, much appreciated!!!

You should always put a bit of lube on the end of the input shaft where it goes into the spigot bearing. Peronally I like to use some anti sieze or such on the pivot ball so you dont get the sqeak from the gearbox on clutch in/out

No he means the last part of the input shaft that tapers down to fit inside the brass bushing (spigot) that sits in the end of the crank and locates the gbox input shaft. In the picture it's the part of the shaft with the smallest diameter.

You also get bonus pictures of my old and new spigot.

post-84937-14137573863275_thumb.jpg

post-84937-14137574070454_thumb.jpg

No that was due to Nissan sending me the wrong spigot and my mechanical inexperience (first time installing one, had no idea what I was doing!) didn't realise it was incorrect size.

But still put anti-seize/engine oil/some form of lubricant on it and the gearbox input shaft before it all goes back together.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Oh bugger ! Your right ! Good old hydrogen sulfide. Takes me back to the good old school days ! 
    • I've owned a few scooters over the years, a Vespa PX oil burner was my first scooter, followed by a few others, including a little 50cc BeeWee that I used as a barracks bike, and I've had a blast on all of them, they really are the cheapest for of city/suburb transport around The only issue with scooters in Australia is lots of people look down on them due to their size,  maybe they need a big bike to make up for something else where they are lacking, unlike Europe and Asia where every man an their dog owns one, and now that filtering is legal in NSW, local traffic is never a issue Not to say I haven't owned my share of big cc bikes over the years, but they were for more blasting through the hills or Hwy riding where it needed to sit on Hwy speeds Safety wise, I ride like everyone is always trying to kill me, everyone is running a red, or running stop/give way signs, or generally asleep at the wheel, which most people are duringtheir commute, I also ride really safe, and give myself, and everyone else enough room in case I need to pull some hasty evasive actions, I've done a few rider training days over the years, which has come in handy on more than a few occasions  As for mods, there's nothing really, and yes your right about aftermarket exhaust, all you get is loud and obnoxious noises from them, like every 250-300 cc you hear with a aftermarket muffler, in saying this I did put a rear muffler from a 125 Aprilla on one of my old 125 scooters, it was horrendous and no amount of full face helmet and ear plugs would dampen that noise As for coming from the Harley, and what a overpriced POS that was, I no longer do big rides as my poor old busted joints ache after about 1/2 an hour of riding, long cruises are so much more enjoyable now in a car, so a big bike would be pointless   
    • Oh wow, it's easy to forget how cheap these can be. Probably the cheapest way to travel. Though people in cars here tend to be morons and I would not feel very safe. Were scooters ever big in Australia? It used to be the thing growing up in Europe ~20 years ago. 50/70/125ccm Peugeot or Yamaha and some others. Utterly obnoxious Polini race exhausts. Kick stands that slant as much as possible. So loud. So much noise for really not moving very fast at all. But it felt cool at the time. Not sure where I'm going with this, but there is an aftermarket for mopeds! Though I'd have pictured you more for a Goldwing kind of guy after growing out of the Harley.
    • You need to know I am sorry for this.  
    • As the MX5 isn't apparently "manly" enough, and I need something for runs to the local shops, and also take to my part time job at the salon, basically I can keep the MX5 away from car parks and stuff......like "flying lockers", I was wondering what I could buy to fix this issue LOL, I pick up a new Yamaha 125 Delight this arvo from Trooper Lu, basically a R1 that you can fit a slab of beer on between your feet, also, it was $29400 cheaper than a R1, so actually it's 2 x better than a R1    
×
×
  • Create New...