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Clutch confusion ...blown?


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#21 dave_hl

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Posted 01 September 2008 - 07:13 PM

just measured my flywheel and realized its a 225mm, they must have put that in there when it was converted to manual instead of the 240mm. I then weighed it and its spot on 16 pounds, they must have lightened it too!  Probably why the bloke i took it to said he couldn't take much/any more weight of it.

Have returned the 240mm clutch and should pick up the new 225 tomorrow.

#22 dave_hl

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Posted 03 September 2008 - 09:19 PM

If one were to over torque a pressure plate bolt and it snapped, and one then proceeded to drill out the bolt but was too lazy to take the pressure plate and flywheel off to use a drill press and so as a result F*&^'d the hole, would they be the stupidest person alive to leave the pressure plate with just 5 out of the 6 bolts holding it and proceed to install the gearbox, or would everything work a-ok and though not advisable work fine.

#23 DevilZ

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Posted 04 September 2008 - 08:37 AM

If one were to over torque a pressure plate bolt and it snapped, and one then proceeded to drill out the bolt but was too lazy to take the pressure plate and flywheel off to use a drill press and so as a result F*&^'d the hole, would they be the stupidest person alive to leave the pressure plate with just 5 out of the 6 bolts holding it and proceed to install the gearbox, or would everything work a-ok and though not advisable work fine.


RAHAHAHAHA ;D

That's sooooo funny !!! Yes there is a good chance the flywheel will come loose with just 5 out of 6 bolts. Especially
if the flywheel does not sit perfectly flush against the back on the crank after drilling it.
Snapping a pressure plate bolt is fairly hard !!! Were you using like a 8 meter breaker bar !?!?!?!!?



#24 dave_hl

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Posted 04 September 2008 - 11:11 AM

nah nah i've got all the flywheel bolts in, thats on the crank fine. Just the pressure plate attaching to the flywheel, its sitting flush and i put a big arsed screw driver in there to see how easily its gonna lift up where the bolt snapped and its sitting pretty darn tight. I was using a slightly longer ratchet then normal, but its probably mostly due to my bulging muscles ya know ;D I was turning it pretty hard, but not ridiculously... i suppose the pressure plate bolts aren't super thick.

I should probably invest in a torque wrench, or convince my dad to anyway! in fact it wouldn't surprise me if there is one hiding in the tool shed somewhere.

so my original question; should i really fix this or will i be right and just proceed to install the gearbox..?

#25 DevilZ

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Posted 04 September 2008 - 11:25 AM

nah nah i've got all the flywheel bolts in, thats on the crank fine. Just the pressure plate attaching to the flywheel, its sitting flush and i put a big arsed screw driver in there to see how easily its gonna lift up where the bolt snapped and its sitting pretty darn tight. I was using a slightly longer ratchet then normal, but its probably mostly due to my bulging muscles ya know ;D I was turning it pretty hard, but not ridiculously... i suppose the pressure plate bolts aren't super thick.

I should probably invest in a torque wrench, or convince my dad to anyway! in fact it wouldn't surprise me if there is one hiding in the tool shed somewhere.

so my original question; should i really fix this or will i be right and just proceed to install the gearbox..?



Ohhh its just the pressure plate bolt......Hahahaha I was thinking the flywheel bolt (i.e the 6 big ones that bolt to the crank)

Na the presure plate bolt wont matter too much at all. Tho if it was balanced using them it will be very very slightly unbalanced now. Other then that the one bolt shouldn't matter. :)



#26 dave_hl

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Posted 04 September 2008 - 11:49 AM

yeah the balancing issue was something i thought about too. But i didn't end up getting it balanced anyway, the bloke at the clutch shop who machine my flywheel said unless you're revving up at 12k then dont worry about it, its not worth it.
Yeah if i had of drilled a hole in my lovely crank i'd be kicking myself in the head and then throwin the towel in and calling lube mobile i think.

#27 Zedman240®

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Posted 04 September 2008 - 11:54 AM

If I were you I would repair/replace that broken bolt! It will put everything out of balance. All those bolts are usually M8 high tensile bolts; pretty hard to break but here we are! You don't want to find youreslf putting it all together then find a sharp vibration at 6000 rpm then having to strip it all apart again for one measly bolt..Theres the right way and the quick way ;)

#28 dave_hl

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Posted 04 September 2008 - 02:52 PM

thats not the answer i was after, zedman. I'm tempted to do it the quick way though still. whats 1 bolt in comparison to roughly 25-30pounds of weight. But i suppose when its spinning that fast it doesn't take much to throw it out of wack, and then i could be doing crank bearings i guess...?

#29 Zedman240®

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Posted 04 September 2008 - 03:10 PM

Best example I can think of is a car wheel + tyre. When they are balancing the wheel and tyre, the weights they use are small but have a huge influence even at a slow rpm. Its not worth the hassle just to save a few hours of extra work. Might end up costing way more in $$$ and time Didn't mean to spoil the moment...

#30 DevilZ

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Posted 04 September 2008 - 03:14 PM

thats not the answer i was after, zedman. I'm tempted to do it the quick way though still. whats 1 bolt in comparison to roughly 25-30pounds of weight. But i suppose when its spinning that fast it doesn't take much to throw it out of wack, and then i could be doing crank bearings i guess...?


It will be alright doing it the quick way. Only the one bolt. Your clutch and flywheel could be thrown out of wack by that much anyway if not balanced rightor if you forget to release the key when starting and chip a tooth on the ring gear etc...
Also if your clutch doesn't wear evenly.
Should be ok, its just the one bolt........

#31 dave_hl

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Posted 04 September 2008 - 04:21 PM

nah, if you think it might screw it up then i might take it apart, might not take long, i might be able to save the hole if i take the clutch/fly off and put it in a drill press, probably worth it.
thanks for the input guys. i'll let you know how i go.

#32 Enzo

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Posted 04 September 2008 - 06:41 PM

Hi Dave,
          Take Zedmans advice and replace the broken bolt or you could be in for major expense if the pressure plate comes adrift. In fact replace all of the bolts. If you over stressed one bolt than the others may be as well. Buy a tension wrench and do the job properly. A tension wrench should always be used and manufacturers recommendations adhered to unless you are a backyard cowboy. It's you life and you passengers that you are playing with if you do botchy jobs. That's my 2 cents. Have a nice day. David.

#33 dave_hl

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Posted 05 September 2008 - 08:11 PM

got a new hole put in today, not where the old one was though! right next to it, but i've roughly calculated that i've lost about 4-5g of weight from the old hole and having to put a new hole next to the one in the pressure plate, so i put it on with 4g washer, hopefully will suffice.
I'm putting the gearbox back on right now, i've got it all the way except for the last 15mm, no matter how much wiggeling and pushing i can't get it flush!  any tips anyone???

cheers.

#34 Zedman240®

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Posted 05 September 2008 - 09:32 PM

Make sure nothing is in the way, and it helps if you put the trans in 1st and with a drive shaft "dummy" in the back, turn it back and forth while you try and push it home. Is the clutch disc in the centre? Theres quite a few things to make sure are aligned when you are having fun installing a gearbox...Without being there its harder!

#35 dave_hl

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Posted 05 September 2008 - 10:50 PM

i got it!
you can call me, the magic man. or the magician. either is fine.
Just kept working it and got it flush eventually bolted it in and its going nowhere fast. A fair workout though! ill put all the other bits and pieces back together after work tomorrow and then hopefully its a smooth drive. i'm lookin forward to feeling how the fresh clutch grabs.

#36 dave_hl

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Posted 07 September 2008 - 12:30 PM

Car is on the road, everything works perfectly. no unusual noises to vibrations so i guess it went together fine.. just gotta put a gasket or seal of some sort in the exhaust join I unbolted in the process, though it sounds pretty dam untamed with exhaust leaking out just after the extractors

I look like an L plater learning to drive at the moment; i'm not used to a clutch which will grab and not let you be sloppy when taking off.

thanks for all the tips and help lads, its quite satisfying to successfully rip the car apart, fix it and put it back together on your own.

#37 Zedman240®

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Posted 08 September 2008 - 05:37 PM

Good to hear, you should be an expert by now!  ;)




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