[Diy_efi] vortec engine piston noise?
Eric Deslauriers
eric.deslauriers at oracle.com
Tue May 21 17:39:48 GMT 2002
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Define rattling. My 93 5.7L Suburban rattled a bit after startup. About
10-15 seconds worth in hot weather (Southern AZ). It did this for 237,000
miles until I traded it for my new one. At the end, the oil still came out
clean and nearly full after 3000 miles. Plus it rattled less, believe it or
not.
If my '01 Yukon XL starts doing it, I'm not going to worry.
I do hear that the newer ones may do this going down the road. That I don't
know about.
Eric D
-----Original Message-----
From: diy_efi-admin at diy-efi.org [mailto:diy_efi-admin at diy-efi.org]On
Behalf Of Todd
Sent: Tuesday, May 21, 2002 9:31 AM
To: Diy_efi at diy-efi.org
Subject: Re: [Diy_efi] vortec engine piston noise?
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 -----
From: Ruffruff8888 at aol.com
To: Diy_efi at diy-efi.org
Cc: sravet at arm.com
Sent: Tuesday, May 21, 2002 10:25 AM
Subject: Re: [Diy_efi] vortec engine piston noise?
I do.
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.
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.
GM has a Techincal service bulletin on the issue and it plan and simple
saids "DO NOT REPLACE MOTOR" .
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.
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.
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.
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.
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.
Loyde
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
diagnosed, what it sounds like, etc., can you get back to me directly?
thanks,
--steve
--
Steve Ravet
steve.ravet at arm.com
ARM,Inc.
www.arm.com
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<DIV><SPAN class=3D387283217-21052002><FONT face=3DArial color=3D#0000ff =
size=3D2>Define=20
rattling. My 93 5.7L Suburban rattled a bit after startup. About 10-15 =
seconds=20
worth in hot weather (Southern AZ). It did this for 237,000 miles until =
I traded=20
it for my new one. At the end, the oil still came out clean and nearly =
full=20
after 3000 miles. Plus it rattled less, believe it or =
not.</FONT></SPAN></DIV>
<DIV><SPAN class=3D387283217-21052002><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D387283217-21052002><FONT face=3DArial color=3D#0000ff =
size=3D2>If my=20
'01 Yukon XL starts doing it, I'm not going to worry. =
</FONT></SPAN></DIV>
<DIV><SPAN class=3D387283217-21052002><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D387283217-21052002><FONT face=3DArial color=3D#0000ff =
size=3D2>I do=20
hear that the newer ones may do this going down the road. That I don't =
know=20
about.</FONT></SPAN></DIV>
<DIV><SPAN class=3D387283217-21052002><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D387283217-21052002><FONT face=3DArial color=3D#0000ff =
size=3D2>Eric=20
D</FONT></SPAN></DIV>
<DIV><SPAN class=3D387283217-21052002><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid; MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> =
diy_efi-admin at diy-efi.org=20
[mailto:diy_efi-admin at diy-efi.org]<B>On Behalf Of =
</B>Todd<BR><B>Sent:</B>=20
Tuesday, May 21, 2002 9:31 AM<BR><B>To:</B>=20
Diy_efi at diy-efi.org<BR><B>Subject:</B> Re: [Diy_efi] vortec engine =
piston=20
noise?<BR><BR></FONT></DIV>
<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"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=3DRuffruff8888 at aol.com=20
href=3D"mailto:Ruffruff8888 at aol.com">Ruffruff8888 at aol.com</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3DDiy_efi at diy-efi.org=20
href=3D"mailto:Diy_efi at diy-efi.org">Diy_efi at diy-efi.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Cc:</B> <A title=3Dsravet at arm.com =
href=3D"mailto:sravet 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.=20
I 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=20
motor, put the oil back in and brought the truck in for warrantty on =
a new=20
motor. The factory uses different motors than what goes down the =
mass=20
assembley line so, you get a better motor under warrantty. <BR><BR>I =
traded=20
my 2001 for a 2002 after only 30K of miles. Mine rattled ALL the =
time. I=20
could not stand it. Sounded like a deasil. <BR><BR>Heres another bit =
of=20
info. The corvettes had the same problem. Loose bores. GM replaced =
the=20
pistons only on those motors under warranty. Well, I dont have a =
corvette,=20
but this what the dealer told me when I was getting my new 2002. =
<BR><BR>GM=20
seems to have resolved the problem for the 2002 6.0. I have 12K on =
mine and=20
it seems to have only normal noises. <BR><BR>I have owned the 99 =
(first year=20
for 6.0 in 2500) and 2001, and 2002 trucks. The 99's were the best =
year. I=20
could run with a North* cad with that truck. However, it was a 3/4 =
ton light=20
and weight was lower with the 6.0 engine. <BR><BR>Loyde <BR><BR><BR>
<BLOCKQUOTE=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff =
2px solid; MARGIN-RIGHT: 0px"=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 =
lang=3D0=20
face=3DArial color=3D#000000 size=3D3=20
FAMILY=3D"SANSSERIF"></BLOCKQUOTE><BR></FONT><FONT lang=3D0 =
face=3DArial=20
color=3D#000000 size=3D2=20
FAMILY=3D"SANSSERIF"><BR></BLOCKQUOTE></BLOCKQUOTE></FONT></FONT></BODY><=
/HTML>
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