Engine Vibes

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" rowspan="2" width=210 BGCOLOR="#9999FF" TEXT="#080000" bgproperties="fixed" background="11e924263.jpg"> <bR> </td> <td valign="top" colspan=2 height=75 BGCOLOR="#99CCFF" TEXT="#080000"> <div> <B> </B><FONT SIZE="2" COLOR="#0000CC" FACE="Times New Roman" ><B>   |   </B></FONT><FONT SIZE="2" COLOR="#0000CC" FACE="Arial" ><A HREF="index.htm" TARGET="_top" TITLE=" "><U>home</U></A></FONT></div> <div> <A HREF="hints___tips.htm" TARGET="_top" TITLE="Hints Tips"><U><B><IMG SRC="0430e0e0.png" border=0 width="14" height="14" ALT="up" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></U></A><B>  </B><IMG BORDER="0" SRC="1x1.gif" HEIGHT="14" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" WIDTH="14"><B>     </B><A HREF="id121.htm" TARGET="_top" TITLE="Alloy Bolts"><U><B><IMG SRC="0440e0e0.png" border=0 width="14" height="14" ALT="previous" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></U></A><B>  </B><A HREF="id117.htm" TARGET="_top" TITLE="Swing Keel"><U><B><IMG SRC="0450e0e0.png" border=0 width="14" height="14" ALT="next" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></U></A></div> <div> </div> </td> </tr><tr> <td valign="top" height=405 colspan=2 BGCOLOR="#99CCFF" TEXT="#080000" bgproperties="fixed" background="91940403.png"> <div> Engine Vibes</div> <bR> <div> <B>Eliminating Engine Vibrations A Checklist by Gilles Sainte:</B></div> <div>   </div> <div> The solution to the problem is the elimination of variables, one by one:</div> <bR> <div> 1 - Check shaft trueness and wear on a flat glass or machinist surface, or with a gauge, not by eye</div> <div> 2 - check engine and flange alignment in water</div> <div> 3 - Check that the engine mounts are indeed the right ones (vibrations linked to rpms could be caused by  wrong mounts)</div> <div> 4 - Check that the mounts are bolted properly  </div> <div> 5 - Disconnect shaft from transmission.</div> <div> 6 - Operate engine in neutral at all rpm's. Engine should run smoothly, with a gradual increase in noise  and vibrations with speed, with some sweet spots.  If  it vibrates a lot at some rpm's, there is an engine  unbalance problem.</div> <div> 7 - Then do it with the transmission engaged. If the  vibration patterns change, there is a trans problem.</div> <div>   </div> <div> <B>Note</B>  6 and 7 are quite rare, although I've seen Volvos with  cracked or chipped flywheels. </div> <bR> </td> </tr></table></body>