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'66 390 Internal Vibration
By Paladin - 08/22/2001 12:28:44 AM; IP 4.4.107.177
Help! I just purchased a really straight '66 Thunderbird Landau that had a new 390 long block installed by the prior owner. It now has about 1,000 miles on it and displays no problems whatsoever other than the "shakes". You can feel a vibration inside the engine through the gas pedal. It is barely noticeable at about 1,000 RPM, becomes very distinct around 2,000 RPM, and goes mostly away by about 2,500 RPM. The vibration dampner on it is the one specified for the 315 horse 390 that came in the T-Bird. It is a very thin one, about 3/8 inch in depth. My prior association with 390s had them with a dampner that was about 1 1/2 inches in depth. Since this 390 long block is not a '66, is the vibration because of having the thin dampner on it rather than the thick one? And if that is the case, do I need to change the flywheel also? Any help would be appreciated in this.

God bless America,
Paladin
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Collapse <b>'66 390 Internal Vibration</b>&nbsp;-- <font color=#0000ff>Paladin, <i>08/22/2001</i></font>'66 390 Internal Vibration -- Paladin, 08/22/2001
Collapse <a href=../ForumFE/reply.aspx?ID=7761&Reply=7759><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor7761" onclick="return false;">The wrong damper won't make it shake.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>08/22/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=7761', contentMargin: 60, icon: $('anchor7761') }); </script>  The wrong damper won't make it shake. -- Dave Shoe, 08/22/2001
 RE: Dampner may not be the problem -- Mel Clark, 08/22/2001
 RE: '66 390 Internal Vibration -- BOB HOPKINS, 08/22/2001
Collapse <a href=../ForumFE/reply.aspx?ID=7777&Reply=7759><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor7777" onclick="return false;">RE: '66 390 Internal Vibration</a>&nbsp;-- <font color=#0000ff>Ray, <i>08/22/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=7777', contentMargin: 60, icon: $('anchor7777') }); </script>  RE: '66 390 Internal Vibration -- Ray, 08/22/2001
Collapse <a href=../ForumFE/reply.aspx?ID=7781&Reply=7759><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor7781" onclick="return false;">RE: '66 390 Internal Vibration</a>&nbsp;-- <font color=#0000ff>Mel Clark, <i>08/22/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=7781', contentMargin: 60, icon: $('anchor7781') }); </script>  RE: '66 390 Internal Vibration -- Mel Clark, 08/22/2001
 Not exactly. -- Dave Shoe, 08/23/2001
Collapse <a href=../ForumFE/reply.aspx?ID=7792&Reply=7759><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor7792" onclick="return false;">Internally balanced 428</a>&nbsp;-- <font color=#0000ff>Ross, <i>08/23/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=7792', contentMargin: 60, icon: $('anchor7792') }); </script>  Internally balanced 428 -- Ross, 08/23/2001
 RE: Internally balanced 428 Revisited -- Mel Clark, 08/24/2001
 What I'd do -- Ross, 08/23/2001
 First Thing I'd Check -- Skip C., 08/23/2001
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