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vibration/shudder at 70 - possible alternatives (other than wheel balance?)
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i agree with this theory, but i just shot it out of the water tonight =
--- i put in a fresh set of rebuilt half shafts. while it did help the =
issue slightly, the shudder at 70 is still there. over the past week of =
narrowing the problem down, i have these facts remaining:
- vibration seems to be coming from front right.
- front right is the wheel is the one i had sent off to the straightener =
(it came back *very* close to perfectally true.
- jacked up front right and spun it (via engine). the wheel seems to be =
straight as it spins, but the tire seems like it may be slightly out of =
round. i'll have to check this out some more later.
Al
----- Original Message -----=20
From: L F=20
To: Michael Abatzis ; scirocco-l@scirocco.org=20
Sent: Wednesday, April 23, 2003 7:33 PM
Subject: Re: vibration/shudder at 70 - possible alternatives (other =
than wheel balance?)
I gotta' chime in here fellas; I've been driving cars for a lot of =
years and learned that a harmonic vibration most likely is NOT a wheel =
imbalance. =20
I'd lean towards CV joint or engine imbalance (I've had both of these =
situations result in harmonics)
Larry
sandiego16v
----- Original Message -----=20
From: Michael Abatzis=20
To: scirocco-l@scirocco.org=20
Sent: Tuesday, April 22, 2003 8:41 AM
Subject: RE: vibration/shudder at 70 - possible alternatives (other =
than wheel balance?)
try getting a mounted balance--the wheels are balanced on the car, =
so it=20
essentially balances all that rotating mass (rotors, hubs, etc). my =
shop=20
does it for $8 wheel. i had the wheels/tires balanced unmounted =
first, then=20
mounted; i was amazed how much tweaking needed to be done with the =
mounted=20
balance. the car is lowered, and is rock solid as fast as i care to =
go...
-Michael Abatzis
Hotlanta! GA-->Soon to be New Orleans!
1988 Scirocco 2L 16v RIP-->parting, finally taking orders:=20
www.learnlink.emory.edu/~mabatzi/mikes_page1.html
1987 Scirocco 2L 16v...
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<DIV><FONT face=3DArial size=3D2>i agree with this theory, but i just =
shot it out of=20
the water tonight --- i put in a fresh set of rebuilt half shafts. while =
it did=20
help the issue slightly, the shudder at 70 is still there. over the past =
week of=20
narrowing the problem down, i have these facts remaining:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>- vibration seems to be coming from =
front=20
right.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>- front right is the wheel is the one i =
had sent=20
off to the straightener (it came back *very* close to perfectally=20
true.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>- jacked up front right and spun it =
(via engine).=20
the wheel seems to be straight as it spins, but the tire seems like it =
may be=20
slightly out of round. i'll have to check this out some more =
later.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Al</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Drocco16v@netzero.net href=3D"mailto:rocco16v@netzero.net";>L =
F</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dabatzis2@hotmail.com=20
href=3D"mailto:abatzis2@hotmail.com";>Michael Abatzis</A> ; <A=20
title=3Dscirocco-l@scirocco.org=20
href=3D"mailto:scirocco-l@scirocco.org";>scirocco-l@scirocco.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, April 23, 2003 =
7:33=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: vibration/shudder =
at 70 -=20
possible alternatives (other than wheel balance?)</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>I gotta' chime in here fellas; =
I've been=20
driving cars for a lot of years and learned that a=20
<EM>harmonic</EM> <EM>vibration </EM>most likely is NOT a wheel=20
imbalance. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2> I'd lean towards CV joint or =
engine=20
imbalance (I've had both of these situations result in =
harmonics)</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Larry</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>sandiego16v</FONT></DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dabatzis2@hotmail.com =
href=3D"mailto:abatzis2@hotmail.com";>Michael=20
Abatzis</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dscirocco-l@scirocco.org=20
href=3D"mailto:scirocco-l@scirocco.org";>scirocco-l@scirocco.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, April 22, 2003 =
8:41=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: =
vibration/shudder at 70 -=20
possible alternatives (other than wheel balance?)</DIV>
<DIV><BR></DIV>try getting a mounted balance--the wheels are =
balanced on the=20
car, so it <BR>essentially balances all that rotating mass (rotors, =
hubs,=20
etc). my shop <BR>does it for $8 wheel. i had the wheels/tires =
balanced=20
unmounted first, then <BR>mounted; i was amazed how much tweaking =
needed to=20
be done with the mounted <BR>balance. the car is lowered, and =
is rock=20
solid as fast as i care to go...<BR><BR><BR>-Michael =
Abatzis<BR>Hotlanta!=20
GA-->Soon to be New Orleans!<BR>1988 Scirocco 2L 16v =
RIP-->parting,=20
finally taking orders: <BR><A=20
=
href=3D"http://www.learnlink.emory.edu/~mabatzi/mikes_page1.html";>www.lea=
rnlink.emory.edu/~mabatzi/mikes_page1.html</A><BR>1987=20
Scirocco 2L=20
=
16v...<BR><BR><BR><BR><BR>_______________________________________________=
__________________<BR>MSN=20
8 helps eliminate e-mail viruses. Get 2 months FREE*. <BR><A=20
=
href=3D"http://join.msn.com/?page=3Dfeatures/virus";>http://join.msn.com/?=
page=3Dfeatures/virus</A><BR><BR><BR>____________________________________=
___________<BR>Scirocco-l=20
mailing list<BR><A=20
=
href=3D"mailto:Scirocco-l@scirocco.org";>Scirocco-l@scirocco.org</A><BR><A=
=20
=
href=3D"http://neubayern.net/mailman/listinfo/scirocco-l";>http://neubayer=
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