Successful clutch change!
#17
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Location: California "Arnoldville"
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When I lift my car for maintenance, I jack all corners. I bring all the wheels off the ground about 3 inches.
I jack at the factory lifting points and place the jack stands under the inner suspension pivots in the front and under the trailing arm near the wheel in the rear.
I place the jack stand under the trailing arm at the flat spot with a hole it by the wheel.
For engine/trans removal, I perform the following additional steps.
Jack using the aft jack points and two floor jacks to raise it to a height that your third floor jack can reach under the engine/trans.
To determine the proper height, I measure the height of the jack, any cribbing, minus an inch for good measure.
I then lower the engine to my dolly and raise the car enough to get the engine out from under the rear valance. Once the engine is out I lower the car to a reasonable height.
I have single handedly removed and installed both my 964 and my 911T engine/transmissions with this procedure.
I jack at the factory lifting points and place the jack stands under the inner suspension pivots in the front and under the trailing arm near the wheel in the rear.
I place the jack stand under the trailing arm at the flat spot with a hole it by the wheel.
For engine/trans removal, I perform the following additional steps.
Jack using the aft jack points and two floor jacks to raise it to a height that your third floor jack can reach under the engine/trans.
To determine the proper height, I measure the height of the jack, any cribbing, minus an inch for good measure.
I then lower the engine to my dolly and raise the car enough to get the engine out from under the rear valance. Once the engine is out I lower the car to a reasonable height.
I have single handedly removed and installed both my 964 and my 911T engine/transmissions with this procedure.
#18
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Originally Posted by racergreg
Total time for the job was about 22 hours, including a stuck oil line connection (the one up to the filter mount) that cost a couple of hours, and the motor mount bolts (torque > 500 lbs!) that took another hour or so. We fooled around with the jacks a lot, and didn't rush. Having now done it once, I think it could easily be done in 14-16 hours.
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If anyone is considering this but their uncomfortable jacking the car up so high and at such an extreme angle (it looks a lot worse in pictures than it does in real life) you can remove the top of the motor (intake manifold) and rear bumper and then you only need 18" of clearance. I did that the first time, the second time I just lifted the rear end up skyward (using 2 jacks, 4 chocks and 4 jackstands) I put the pallet that my air compressor was delivered on between the ATV jack and the motor, the tranny & engine combination was balanced perfectly.
Originally Posted by Andy Roe
How come you decided to drop the engine too when the clutch could have been done by dropping just the gearbox on a C2?
#19
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Originally Posted by Bill Gregory
That must have been what it took to undo a stuck nut! Stock spec calls for around 62 ft lbs torque.
#20
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Originally Posted by axl911
Where do you place the jack to jack the car up that high? The factory jacking point in frot of the wheel well? Or on the rear control arm? I am afraid that if I jack the car up at the factory jacking point up to 37 inches, the extreme angle would cause the car to slip right off.
We chocked the front wheels, and though the car was at a big angle, it was very stable.
#21
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Originally Posted by Bill Gregory
You don't need to drop the engine to replace the clutch on a C2. Does allow you to do other maintenance on the engine, though.
I have dropped just the trans in the past, but had a hell of a time getting the trans to seat onto the engine. To me, its easier to bite the bullet and drop the whole assy.
Yes, those rear engine mount nuts were ON there. We had my snap-on 3' breaker bar plus a floorjack handle on those suckers and it was all we could do to crack those loose. Turns out, the engine mount plate got bent near where the barrel is welded to the flat plate. Wow they were tight
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