Re: Vibration in the 1800 RPM range - thoughts or suggestions
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Home away from home
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Did the engine vibrate before the rebuild?????
Posted on: 2014/1/1 20:29
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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Re: Vibration in the 1800 RPM range - thoughts or suggestions
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Home away from home
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Try a compression check. Also there is some kind of valve lifter bleed down procedure in the SM.
Posted on: 2014/1/1 20:42
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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Re: Vibration in the 1800 RPM range - thoughts or suggestions
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Home away from home
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Is the motor in a Packard, 56J, or Nash? Is the vibration most noticeable when sitting in the car, or leaning over the fender? Are any of the motor mounts "bottomed out", or brittle? Are the exhaust pipes "kissing" the frame anywhere? Are the pipes rubber strap mounted, as they should be? If in a 56J, is the generator bracket kissing the fender apron?
Did he have the rods checked for straightness when he did the rebuild? Can he "feel" the vibration, in synch with his ears, by laying his hand on the motor? If its a 56J, can he feel the vibration, in synch with his ears by putting his fingertips on the headliner?
Posted on: 2014/1/1 20:45
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Re: Vibration in the 1800 RPM range - thoughts or suggestions
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Home away from home
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The TC was likely balanced at the factory. But if anyone has disassembled it during the past 50+ years it may be out of balance. I recall making an alignment mark across both halves, before dis-assembly. If the halves are not reassembled exactly as they were when balanced, it screws up the balance.
So, if none of the aforementioned fix the problem, it may be in the TC. I once test drove a 56J with Torque-Flight tranny installed, and it had a pretty bad vibration, coming off idle till about 2000 RPM. I hypothesized it was due to the spool adapter being slightly out of alignment, but passed on buying the car for fear that fixing it coulda turned into a can of worms.
Posted on: 2014/1/1 23:03
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