[Diy_efi] vortec engine piston noise?
Todd
todd at digital-forever.com
Tue May 21 16:35:47 GMT 2002
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Piston slap. I belive. check www.fullsizechevy.com and there should be =
some post about it or post a msg and they can help you.
----- Original Message -----=20
From: Ruffruff8888 at aol.com=20
To: Diy_efi at diy-efi.org=20
Cc: sravet at arm.com=20
Sent: Tuesday, May 21, 2002 10:25 AM
Subject: Re: [Diy_efi] vortec engine piston noise?
I do.=20
I purchased a 2001 silverrado 6.0 liter. It starting rattleing at 3000 =
miles. I thought it would quit at about 12K. It got worse.=20
I contacted a service manager I was good friends with and he indicated =
the problem was a loose bore in the engine and the pistons are rocking =
in the sleeves. (piston slap). GM dyno'ed the engines until death and =
decided that 150K was the life of the motor and these noisy motors would =
make it there.=20
GM has a Techincal service bulletin on the issue and it plan and =
simple saids "DO NOT REPLACE MOTOR" .=20
The service manager told me a couple of farmers in his area would not =
take no for the answer and drained the oil, blew the motor, put the oil =
back in and brought the truck in for warrantty on a new motor. The =
factory uses different motors than what goes down the mass assembley =
line so, you get a better motor under warrantty.=20
I traded my 2001 for a 2002 after only 30K of miles. Mine rattled ALL =
the time. I could not stand it. Sounded like a deasil.=20
Heres another bit of info. The corvettes had the same problem. Loose =
bores. GM replaced the pistons only on those motors under warranty. =
Well, I dont have a corvette, but this what the dealer told me when I =
was getting my new 2002.=20
GM seems to have resolved the problem for the 2002 6.0. I have 12K on =
mine and it seems to have only normal noises.=20
I have owned the 99 (first year for 6.0 in 2500) and 2001, and 2002 =
trucks. The 99's were the best year. I could run with a North* cad with =
that truck. However, it was a 3/4 ton light and weight was lower with =
the 6.0 engine.=20
Loyde=20
If anyone has some concrete information on the piston noise problems =
with the new Chevy vortec truck engines, like what causes it, how =
it's=20
diagnosed, what it sounds like, etc., can you get back to me =
directly?=20
thanks,=20
--steve=20
--=20
Steve Ravet=20
steve.ravet at arm.com=20
ARM,Inc.=20
www.arm.com
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<DIV><FONT face=3DArial size=3D2>Piston slap. I belive. check <A=20
href=3D"http://www.fullsizechevy.com">www.fullsizechevy.com</A> and =
there should=20
be some post about it or post a msg and they can help you.</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-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 href=3D"mailto:Ruffruff8888 at aol.com"=20
title=3DRuffruff8888 at aol.com>Ruffruff8888 at aol.com</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
href=3D"mailto:Diy_efi at diy-efi.org"=20
title=3DDiy_efi at diy-efi.org>Diy_efi at diy-efi.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Cc:</B> <A =
href=3D"mailto:sravet at arm.com"=20
title=3Dsravet at arm.com>sravet at arm.com</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, May 21, 2002 =
10:25=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [Diy_efi] vortec =
engine=20
piston noise?</DIV>
<DIV><BR></DIV><FONT face=3Darial,helvetica><FONT size=3D2>I do. =
<BR><BR>I=20
purchased a 2001 silverrado 6.0 liter. It starting rattleing at 3000 =
miles. I=20
thought it would quit at about 12K. It got worse. <BR><BR>I contacted =
a=20
service manager I was good friends with and he indicated the problem =
was a=20
loose bore in the engine and the pistons are rocking in the sleeves. =
(piston=20
slap). GM dyno'ed the engines until death and decided that 150K was =
the life=20
of the motor and these noisy motors would make it there. <BR><BR>GM =
has a=20
Techincal service bulletin on the issue and it plan and simple saids =
"DO NOT=20
REPLACE MOTOR" . <BR><BR>The service manager told me a couple of =
farmers in=20
his area would not take no for the answer and drained the oil, blew =
the motor,=20
put the oil back in and brought the truck in for warrantty on a new =
motor. The=20
factory uses different motors than what goes down the mass assembley =
line so,=20
you get a better motor under warrantty. <BR><BR>I traded my 2001 for a =
2002=20
after only 30K of miles. Mine rattled ALL the time. I could not stand =
it.=20
Sounded like a deasil. <BR><BR>Heres another bit of info. The =
corvettes had=20
the same problem. Loose bores. GM replaced the pistons only on those =
motors=20
under warranty. Well, I dont have a corvette, but this what the dealer =
told me=20
when I was getting my new 2002. <BR><BR>GM seems to have resolved the =
problem=20
for the 2002 6.0. I have 12K on mine and it seems to have only normal =
noises.=20
<BR><BR>I have owned the 99 (first year for 6.0 in 2500) and 2001, and =
2002=20
trucks. The 99's were the best year. I could run with a North* cad =
with that=20
truck. However, it was a 3/4 ton light and weight was lower with the =
6.0=20
engine. <BR><BR>Loyde <BR><BR><BR>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; =
MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"=20
TYPE=3D"CITE">If anyone has some concrete information on the piston =
noise=20
problems <BR>with the new Chevy vortec truck engines, like what =
causes it,=20
how it's <BR>diagnosed, what it sounds like, etc., can you get back =
to me=20
directly? <BR><BR>thanks, <BR>--steve <BR><BR>-- <BR>Steve Ravet=20
<BR>steve.ravet at arm.com <BR>ARM,Inc. <BR>www.arm.com</FONT><FONT=20
color=3D#000000 face=3DArial lang=3D0 size=3D3=20
FAMILY=3D"SANSSERIF"></BLOCKQUOTE><BR></FONT><FONT color=3D#000000 =
face=3DArial=20
lang=3D0 size=3D2 =
FAMILY=3D"SANSSERIF"><BR></BLOCKQUOTE></FONT></FONT></BODY></HTML>
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