slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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damnit!slater
@slater
Club Retro Rides Member 78
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Jun 16, 2006 13:28:45 GMT
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Just took the mini down the lane for its first proper drive and its gone and done 'something' and now makes a loud crunching/gear shearing sound whever you try and lift the clutch up! Id just pulled out my drive and gone through the gears to check they were all there. going about 30mph change down from 4th to 3rd, hit a bump and the motor cuts out and all i hear is this crunch.......crunch. so i pop it back out of gear and let it roll to a stop. Just about to get out the car when, guess what?! some guy comes along the road behind me and i have to get out and push the car up then bank so he can get passed! (no help from him!  ) i have a quick look but it all looks fine from the outside so i dicide i need to get back home before anyone else comes down the road so i restart it. - starts fine - runs fine. foot on the clutch - fine. Reverse gear - fine. Go to lift my foot up and it moves a little but the sound starts again. So then i put my foot back on the clutch and it rolls backwards down the hill, (still running) i then bring the clutch up slowly and it bites a little and semes fine unless you let it up all the way. So i reverse down the road slipping the clutch. Turn around in the nearest gateway try going forwards, does the same thing! i get home only to find i can get the car back into my drive cous its on a slope and it wont go up it! So I'm annoyed and a little baffled as to what the problem is and i cant get the car back in the garage till i find someone to give me a hand (everyones at work!) it rolls ok so i cant see that its the wheels,drive shafts or gearbox. and the engine runs ok so i cant see it being that. so i assume its a clutch issue maybe?? but then the clutch tuns with eh engine etc.? i dunno but i hope its not too serious |
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impmann
Posted a lot
Overcoming stupidity is the greatest challenge left to mankind
Posts: 1,089
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Jun 16, 2006 14:08:04 GMT
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Clutch thrust bearing failure? From memory you can do this without removing the engine on a Mini...
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1964 Hillman Imp
1976 Hillman Imp
1967 Hillman Imp
(And a few projects dotted around the country)
Just cos something is good for you doesn't mean its good for everyone - for example Marmite does not make good Dog Food.
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Nathan
Club Retro Rides Member
Posts: 5,627
Club RR Member Number: 1
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damnit!Nathan
@bgtmidget7476
Club Retro Rides Member 1
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Jun 16, 2006 14:19:31 GMT
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Loose master cylinder?
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Jun 16, 2006 14:49:00 GMT
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If its only when you start to let the clutch out then it sounds like something wrong between the plate and housing. As everything else is connected? Drop gears mabe?
J
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Jun 16, 2006 14:56:06 GMT
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When I was 15 I did a clutch on an Austin 1300. It was my first 'big' mechanical job and like a complete noob, I didn't put the flywheel bolt and washer in right so after the first run the flywheel came loose on the crankshaft taper. If i remember rightly, the result was similar to what you are describing.
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1962 Datsun Bluebird Estate - 1971 Datsun 510 SSS - 1976 Datsun 710 SSS - 1981 Dodge van - 1985 Nissan Cherry Europe GTi - 1988 Nissan Prairie - 1990 Hyundai Pony Pickup - 1992 Mazda MX5
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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damnit!slater
@slater
Club Retro Rides Member 78
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Jun 16, 2006 15:35:01 GMT
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yeh i think i will have to take the bellhousing cover off and take a look tonight. I think if you support the bottom of the engine and take out the engine mount on that side you can get it ooff ok without taking the whole engine out. i built this engine/box when i was 14, bound to have issues  |
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damnit!iRocco
@1380checkm8
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Jun 16, 2006 16:22:39 GMT
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yeh i think i will have to take the bellhousing cover off and take a look tonight. I think if you support the bottom of the engine and take out the engine mount on that side you can get it ooff ok without taking the whole engine out. i built this engine/box when i was 14, bound to have issues Indeed - dead easy job. You don't even need to remove the engine mount as this is attached to the bell housing itself. There's one bolt that you will curse over for hours on the bell housing, and that's the one right at the back behind the slave cylinder (right in line with the top / back lip of the sub frame) - when you put it all back together again don't bother putting this bolt back in......it'll save lots of time / skin on knuckles if you ever have to do the job again. It sounds to me as if either the flywheel as come loose (I hope for your sake it hasn't done any damage to the crank if so), or it could be that the pressure plate isn't properly affixed to the flywheel. Little bit of advice - don't leave a bolt lying in the bell housing when you put it back on  |
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Last Edit: Jun 16, 2006 16:25:53 GMT by iRocco
 I like long walks, especially when they're taken by people I don't like. |
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hmmmmm i would of thought that if the flywheel had come loose then you'd of had trouble starting it again or it would of made a racket. Is it pre engaged or later type?
To me the problem sounds like the planetary wheels have lost teeth in the diff. Used to get this problem a fair bit on the mini i used to race. It would explain why u can drive it by only slipping the clutch. With only a little force on the diff its biting just enough to hold, but then when u let the clutch up and are applying full driven force to the diff it lets go resulting in a crunch.
Also had the exact same problem with a mondeo st24 a few months back caused by reverse figure of 8's on the grass the silly fool. 3 teeth remained that time.
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i had a similar problem a short while ago. exactly as you have described. and it was an OS inner CV joint failure. when the car was in the air the clutch could be brought up fully and all gears engaged but it wouldn't work with the weight of the car on it.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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damnit!slater
@slater
Club Retro Rides Member 78
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Thts exactly what we thought jim, after my dad came home last night we had another look and you can see the passenger side drive shaft is vibrating up and down alot, athough its only doing it when you try and put alot of torque down. If you relly slip the clutch its ok.
I dismantled both driveshafts last night and all the splines are still there and it looks to me like the cv joints are ok (how do you tell if they are worn? would that cause it?)
I'm still not sure wht it is so i think il pop the diff out and check that aswell as it semes the next likely suspect.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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damnit!slater
@slater
Club Retro Rides Member 78
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Jun 17, 2006 11:39:08 GMT
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Found the problem at last! my drive shaft is too short!! I didnt notice it a first but you can see where the driveshaft has popped out of the pot and the ball bearings have chewed up the end of the pot joint. (the crunching noise)  Its aggrivated by the car being lowered which has put the shafts a a funny angle pulling them out a couple of mm extra but i don't think its soley down to it being low. Its as if my drive shafts are 10+mm too short or something. |
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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damnit!slater
@slater
Club Retro Rides Member 78
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Jun 17, 2006 15:03:54 GMT
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Solved it! the bearing cage was in the wrong way round! doh! simple problem simple fix atleast. Hope your enjoying my hour by hour commentry |
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racer86
Posted a lot
'76 Toyota KP30 / '73 BMW 2002 / '93 Mini
Posts: 2,183
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Jun 17, 2006 17:32:17 GMT
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Nice one mate, glad to hear it fixed. Cant wait to see it at CARS!!
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street
Posted a lot
6.2 ft/lbs of talk
Posts: 4,662
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Jun 17, 2006 18:06:40 GMT
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Good work! Glad it wasn't anything too expensive/difficult ;\0
CaRS ahoy!!
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Jun 17, 2006 20:24:17 GMT
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Ahh nice easy fix, we like those! Good detective work mate  Yeah I'm looking forward to seeing this little beasty at CATS (*cars!) J edit - Classic And Tat Show! |
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Last Edit: Jun 17, 2006 20:25:22 GMT by Blown_Imp
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suffolkpaul
Part of things
Retro Free - just a pug 406 with 230k miles on it...
Posts: 696 
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Jun 17, 2006 20:36:47 GMT
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are your shafts ok (oooerr!)?? still straight? (OOOOEEERRRR!!)
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SkoCan
Posted a lot
Quando omni flunkus, mortati
Posts: 1,916
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Jun 17, 2006 21:22:54 GMT
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Hope your enjoying my hour by hour commentry As a matter of fact....Yes eduncational educatedalI learned somthing ;D |
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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damnit!slater
@slater
Club Retro Rides Member 78
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Jun 17, 2006 21:30:30 GMT
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Shafts are ok but i put another pot joint on just to be safe. Took it up the road for another run and it feels good. gear linkage takes a bit of getting used to as you only have to move it about 30mm to change from 1-2, dunno about quickshift, more lightspeed shift  ! All i have left to do is MOT and make/fit some windows and she will be done. oh and is there a way for me to tax it before july the 1st and still get the extra month or will i have to sacrafice 3 weeks or go down on saturday moring before CARS (not likely as it needs running in!) |
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) i have a quick look but it all looks fine from the outside so i dicide i need to get back home before anyone else comes down the road so i restart it. - starts fine - runs fine. foot on the clutch - fine. Reverse gear - fine. Go to lift my foot up and it moves a little but the sound starts again. So then i put my foot back on the clutch and it rolls backwards down the hill, (still running) i then bring the clutch up slowly and it bites a little and semes fine unless you let it up all the way. So i reverse down the road slipping the clutch. Turn around in the nearest gateway try going forwards, does the same thing! i get home only to find i can get the car back into my drive cous its on a slope and it wont go up it!
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