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Old 01-26-2015, 12:10 AM   #1
Zekesmd
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Default 2000 Sl1 stalls when depressing the clutch

I am new to the forum but would appreciate some help. My nephew has the above mentioned car. He was driving it several weeks ago when he heard a "bang" followed by a stall. He was unable to get the car started and assumed it was a blown engine. After looking into it some more he was able to get it running, I think by bypassing the clutch switch, so that he can start it without depressing the clutch. The issue now is that when ever he pushes the clutch in the vehicle immediately stalls. Any ideas for me? Is this a clutch problem? A hydrolic switch issue? Any info would be greatly appreciated! Thanks in advance!

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Old 01-26-2015, 10:15 AM   #2
54packman
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Default Re: 2000 Sl1 stalls when depressing the clutch

Sound like you have some major problems with the clutch, like the clutch fork has broken, or the pressure plate has shattered, would remove the slave cylinder from the transmission, and see if you can look inside with an inspection camera and see what's gone wrong.

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Old 01-26-2015, 11:11 AM   #3
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Default Re: 2000 Sl1 stalls when depressing the clutch

I have a totally different theory on this one. The clutch safety switch interrupts only the electrical signal to the starter motor, not the ignition or fuel pump IIRC, so it has no way to kill the engine, whether connected or bypassed.

When the clutch pedal is pressed, a high end load is put on the crankshaft. When crank bearings are in good condition, this is not a problem. But, OP mentions a bang before the car died. Could a broken thrust bearing be the cause? Easy check would be to tap or pry the crank pulley, pushing it into the engine, then watch the crank pulley while an assistant pushes the clutch. Engine does not need to be running. If you can see the crank pulley pop out of the engine toward the passenger front wheel when the clutch is pushed, engine is likely shot.

Can you describe better how the engine dies when the clutch is pushed? Does it stop immediately, sputter out, make any odd noises?

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Old 01-26-2015, 10:34 PM   #4
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Default Re: 2000 Sl1 stalls when depressing the clutch

Improper clutch use in the Saturn engine has been known to completely kill the thrust bearing. When I took my engine apart thrust clearance was something on the order or .040-.050" and the bearing surface was gone. At that point the crank hadn't begun to eat anything, but it was close and eventually would've. Checking thrust clearance is as simple as removing the passenger wheel so I would start there. A dial indicator makes this much more accurate, but you will be able to feel actual crankwalk by hand.

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Old 01-26-2015, 11:44 PM   #5
Zekesmd
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Default Re: 2000 Sl1 stalls when depressing the clutch

Quote:
Originally Posted by BV22 View Post
I have a totally different theory on this one. The clutch safety switch interrupts only the electrical signal to the starter motor, not the ignition or fuel pump IIRC, so it has no way to kill the engine, whether connected or bypassed.

When the clutch pedal is pressed, a high end load is put on the crankshaft. When crank bearings are in good condition, this is not a problem. But, OP mentions a bang before the car died. Could a broken thrust bearing be the cause? Easy check would be to tap or pry the crank pulley, pushing it into the engine, then watch the crank pulley while an assistant pushes the clutch. Engine does not need to be running. If you can see the crank pulley pop out of the engine toward the passenger front wheel when the clutch is pushed, engine is likely shot.

Can you describe better how the engine dies when the clutch is pushed? Does it stop immediately, sputter out, make any odd noises?
Engine locks up immediately when the clutch is pushed.
I will have them try your diagnostic with the crank pulley.
Thank you

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Old 01-27-2015, 12:50 AM   #6
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Question Re: 2000 Sl1 stalls when depressing the clutch

Quote:
Originally Posted by Zekesmd View Post
Engine locks up immediately when the clutch is pushed.
I will have them try your diagnostic with the crank pulley.
Thank you
Wait a minute! You say it "locks up"? it immediately stops turning? NOT like when you turn the ignition off where it coasts a little with no ignition. If this is true, then it DOES sound like a mechanical clutch failure issue. And it shouldn't be operated again until repaired.

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