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what all should block balancing entail?
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Jeff,
You should not expect to have the machine shop dis-assemble and =
re-assemble your block for you for that price. You'll have to bring them =
everything dis-assembled, and then re-assemble it yourself. For that =
job, you will need my engine stand :)
The balancing job doesn't balance everything to factory specs, it =
balances them to better-than-factory specs. My motor is very much proof =
of that because it spins really smooth, even at very high rpms. What =
they really do is weigh all 4 of your pistons to figure out which one is =
the lightest. Then they shave non-structural metal off of the heavier =
ones to make them equal the weight of the lightest one. They continue to =
do that with all of the parts, including the nuts/bolts, wrist pins, =
rods, spin balance the crank, etc., etc. The more the better.
Now, it creates more work for you and more cost. Since you'll tear down =
the whole motor, you will probably replace the bearings and a lot of =
seals that you wouldn't have if you just did plug-n-play. Plus you'll =
need brand new rod bolts, and those have to be pressed in, and arguably =
the rods should be re-sized when you do that.
When I did mine the motor had over 100K on it. If I came across a motor =
like yours with only 20K, I don't think I would have opened the bottom =
end.
-- Craig Williams
1981 Scirocco S 2008cc 16V (As seen in 01-2001 Sport Compact Car) 15.114 =
@ 91 MPH
2001 Passat Wagon, 1.8t (For the Wife and Son)
1991 Passat Wagon 2.0 16V (For Sale)
2000 Saab Viggen (20 psi, Turbo charged monster)15.047 @ 94 MPH
Northern California, USA
----- Original Message -----=20
From: Jeff Toomasson=20
To: scirocco-l@scirocco.org=20
Sent: Tuesday, February 19, 2002 9:51 AM
Subject: what all should block balancing entail?
Ok - I'm poised to take my 9A to the machine shop to have it =
"balanced" - even though it only has 20k miles on it, it's been sitting =
for over a year and I just want to be safe. But when I sat back and =
thought about it, I don't know what balancing COMPLETELY entails...I =
know it involves balancing the rotating assemblies to verify they're =
within manufacturer's tolerances, but what else?
=20
Does the machinist take it apart completely and re-assemble? Will they =
sandblast and clean the coolant channels?
=20
The machinist quoted me $200 - what should I expect for that?
=20
Thanks in advance - hope you all had a good weekend!
=20
JT
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<DIV><FONT face=3DArial size=3D2>Jeff,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>You should not expect to have the =
machine shop=20
dis-assemble and re-assemble your block for you for that price. You'll =
have to=20
bring them everything dis-assembled, and then re-assemble it =
yourself. For=20
that job, you will need my engine stand :)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>The balancing job doesn't balance =
everything=20
to factory specs, it balances them to better-than-factory specs. My =
motor is=20
very much proof of that because it spins really smooth, even at very =
high rpms.=20
What they really do is weigh all 4 of your pistons to figure out =
which one=20
is the lightest. Then they shave non-structural metal off of the heavier =
ones to=20
make them equal the weight of the lightest one. They continue to do that =
with=20
all of the parts, including the nuts/bolts, wrist pins, rods, spin =
balance the=20
crank, etc., etc. The more the better.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Now, it creates more work for you =
and more=20
cost. Since you'll tear down the whole motor, </FONT> <FONT =
face=3DArial=20
size=3D2>you will probably replace the bearings and a lot of seals that =
you=20
wouldn't have if you just did plug-n-play. Plus you'll need brand new =
rod bolts,=20
and those have to be pressed in, and arguably the rods should be =
re-sized when=20
you do that.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>When I did mine the motor had over 100K =
on it. If I=20
came across a motor like yours with only 20K, I don't think I would have =
opened=20
the bottom end.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>-- Craig Williams<BR>1981 Scirocco S =
2008cc 16V (As=20
seen in 01-2001 Sport Compact Car) 15.114 @ 91 MPH<BR>2001 Passat Wagon, =
1.8t=20
(For the Wife and Son)<BR>1991 Passat Wagon 2.0 16V (For Sale)<BR>2000 =
Saab=20
Viggen (20 psi, Turbo charged monster)15.047 @ 94 MPH<BR>Northern =
California,=20
USA<BR></FONT></DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A href=3D"mailto:jtoomasson@yahoo.com"; =
title=3Djtoomasson@yahoo.com>Jeff=20
Toomasson</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
href=3D"mailto:scirocco-l@scirocco.org"=20
title=3Dscirocco-l@scirocco.org>scirocco-l@scirocco.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, February 19, =
2002 9:51=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> what all should block =
balancing=20
entail?</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>Ok - I'm poised to take my 9A to the =
machine shop=20
to have it "balanced" - even though it only has 20k miles on it, it's =
been=20
sitting for over a year and I just want to be safe. But when I sat =
back and=20
thought about it, I don't know what balancing COMPLETELY entails...I =
know it=20
involves balancing the rotating assemblies to verify they're within=20
manufacturer's tolerances, but what else?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Does the machinist take it apart =
completely and=20
re-assemble? Will they sandblast and clean the coolant =
channels?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>The machinist quoted me $200 - what =
should I=20
expect for that?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thanks in advance - hope you all had =
a good=20
weekend!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial =
size=3D2>JT</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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