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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Jul 2009 Posts: 90 Shop Shark | | Shop Shark Joined: Jul 2009 Posts: 90 | In order to try to locate the vibration in my engine, I plan to remove the clutch and pressure plate and run the engine to see if that changes anything. (I doubt it as the vibration is present with the clutch engaged or disengaged). Next, I plan to remove the flywheel and see if that makes a difference, but I can't remember if the '57 235 passenger car engine may be balanced in some way by the flywheel. If so, running the engine with it removed won't tell me anything.
Thanks, | | | | | Joined: Feb 2001 Posts: 1,096 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 1,096 | Do check the engine mounts are not collapsed , when they sit down on the frame the vibration is very noticeable. | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | 235 flywheels are neutral balanced.
How are you going to start it without a flywheel?
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | It will be very hard to start the engine with the hand crank after the flywheel is removed. The flywheel provides the inertia to carry the rotating mass through 60 degrees to the next firing cycle.
Evan
| | | | | Joined: Feb 2004 Posts: 29,814 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,814 | The pressure plate spins with the crankshaft whether the clutch is engaged or released. It would be possible to simply unbolt it from the flywheel and run the engine with it hanging on the transmission input shaft without any further disassembly. That would also keep the clutch plate from turning. Just loosen up the clutch adjustment several turns or disconnect the linkage to give the throwout bearing plenty of room to move back. Starting the engine without a flywheel ring gear attached would be interesting to watch!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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