C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Can't separate engine from transmission... grrr...

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Old Aug 8, 2007 | 02:21 AM
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Default Can't separate engine from transmission... grrr...

I have a 93 LT1 coupe that I'm currently trying to pull the engine out of. I have gotten all the accessories, wiring, even the dreaded exhaust brackets from the engine pulled off. Lower half of the engine mounts are removed also.

I have removed all the bellhousing bolts and the aluminum cover from the lower part of the bellhousing so I can see the flywheel. Problem is I can't get the engine to separate completely from the transmission/bellhousing.

There is a 1/4" - 3/8" inch gap now between them, but they refuse to separate any further. I don't see anymore bolts to remove, but it feels like the flywheel is hanging up on something (the starter is removed). I'm getting really frustrated and any help would be much appreciated!

Last edited by bdw18_123; Aug 8, 2007 at 02:26 AM.
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Old Aug 8, 2007 | 02:43 AM
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Usually the exhaust system is dropped, then the C-beam, then the trans-but not the bellhousing/PP/FW. They go with the engine when it's pulled.

Is the slave still mounted? Maybe push the clutch pedal in while someone pulls on the engine.
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Old Aug 8, 2007 | 04:47 AM
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Does the clutch fork need to be pulled back such as a T56 would to release it? Shifter out? Sometimes is something simple and the only way to know is to walk away from it for awhile. Check to make sure any wiring is disconnected.
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Old Aug 8, 2007 | 09:09 AM
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From memory have to disconnect the clutch fork from the pivot on the ZF6.
Long time since I did it but think undoing the pivot bolt is only way.
Does not unclip like regular one.
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Old Aug 8, 2007 | 10:59 AM
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Try jacking up the trans as far as it will go.
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Old Aug 8, 2007 | 11:14 AM
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Originally Posted by rodj
From memory have to disconnect the clutch fork from the pivot on the ZF6.
Long time since I did it but think undoing the pivot bolt is only way.
Does not unclip like regular one.


If your car is a ZF6 you WILL have to undo the pivot bolt, ( It has a PULL clutch as opposed to a conventional PUSH clutch )

1, you will have to remove the C beam, Prop, and then unbolt the trans from the bellhousing,

2, on the bellhousing you will have to unbolt the pivot lock bolt,( 6mm allen key I beleive ) and the pivot bolt ( 13mm allen key I think ) ( Don't forget to undo the pivot bolt you will have to turn it CLOCKWISE )

3, unbolt the slave cyl

4, unbolt belhousing

5, unbolt clutch and flywheel

Done this TOO MANY times just lately

Hope this helps

Adrian
A B M

Last edited by adi4; Aug 8, 2007 at 11:17 AM.
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Old Aug 8, 2007 | 01:36 PM
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Yes it has the ZF6. So I can't just unbolt the tranny and pull the entire engine/bellhousing? I tried to separate bellhousing/engine from tranny first with tranny installed but that didn't work either.

So the only way to do it is to remove the tranny completely? Bear with me, I'm new to vettes, but what is the "C-beam"? Slave cylinder has been removed.
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Old Aug 8, 2007 | 05:48 PM
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anyone?
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Old Aug 8, 2007 | 05:52 PM
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Sounds liek they are saying the clutch pivot ball is your issue.
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Old Aug 8, 2007 | 06:07 PM
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Originally Posted by bdw18_123
anyone?
The c-beam is what connects the trans to the rear end. It's a long aluminum piece that bolts to the tailshaft at one end and through the rearend housing at the other.
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Old Aug 8, 2007 | 06:14 PM
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I hope you have a FSM
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Old Aug 8, 2007 | 06:18 PM
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After getting the torque beam/c-beam piece out of the way, get the transmission out, then you can get to the ball stud they're talking about.
But you can also probably get the engine out with the bellhousing still on, and then deal with it outside of the car.
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Old Aug 9, 2007 | 02:06 AM
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Success! I have removed the engine from the car. I left the transmission installed (with a jack under it of course) and pulled the engine with the bellhousing still on. It was a little tight, but it came out. I had to move the A/C line up and forward a little to clear the balancer hub.

Thanks for all of you guys help, especially adi4's tip about the pivot bolt. I started to crank on it the normal way (damnit, why won't this stupid bolt come out??). Then I remembered him saying that it was a CLOCKWISE bolt. It then came right out.

I'm sure I'll be back with more questions during this project.

Last edited by bdw18_123; Aug 9, 2007 at 02:09 AM.
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Old Aug 9, 2007 | 12:48 PM
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Just curious, as your done now, but did you put any of the bellhousing/tranny bolts back in before you lifted it? Or was all the weight of the tranny hanging on the clutch fork when you lifted it?
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Old Aug 9, 2007 | 01:09 PM
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I put a jack under the tranny to support its weight. All the bolts were removed from the bellhousing (this was before I knew about the clutch fork thing) and the tranny.

After I had gotten both the engine and tranny up a little higher with the hoist and jack under the tranny, I slid the engine/bellhousing off of the transmission shaft and slowly hoisted the engine till I got it clear of the car.

After removing my clutch, looks like I'm gonna need a new clutch disk, mine is all worn out. Can you replace just the clutch disk/pad part without replacing the two heavy metal discs on either side of it?
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Old Aug 9, 2007 | 01:14 PM
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Sorry, couldn't resist! (guess how I learned it?)
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Old Aug 9, 2007 | 01:20 PM
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You can just buy the disk if you like. Get a LUK from autozone, they are O.E. and cheap.
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Old Aug 9, 2007 | 02:18 PM
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Originally Posted by adi4




2, on the bellhousing you will have to unbolt the pivot lock bolt,( 6mm allen key I beleive ) and the pivot bolt ( 13mm allen key I think ) ( Don't forget to undo the pivot bolt you will have to turn it CLOCKWISE )


A B M
My god that would have saved me a lot of cursing if I had known that (don't ask how I got the cluch fork off)
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Old Aug 9, 2007 | 03:46 PM
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Nows the time to deal with it all if your going to.
Not sure about the condition of your flywheel (hot spots/glazing etc)
But I believe you can get a stock LT4 clutch assm and Luk flywheel pretty affordably.
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