[Diy_efi] vortec engine piston noise?
Todd
todd at digital-forever.com
Tue May 21 18:19:40 GMT 2002
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I know the startup thing is usually piston slap... it happens in newer =
chevys =3D/ check out www.fullsizechevy.com and check their forums for =
more info on it.
----- Original Message -----=20
From: Eric Deslauriers=20
To: Diy_efi at diy-efi.org=20
Sent: Tuesday, May 21, 2002 12:43 PM
Subject: RE: [Diy_efi] vortec engine piston noise?
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.
=20
If my '01 Yukon XL starts doing it, I'm not going to worry.=20
=20
I do hear that the newer ones may do this going down the road. That I =
don't know about.
=20
Eric D
=20
-----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 -----=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=20
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>I know the startup thing is usually =
piston slap...=20
it happens in newer chevys =3D/ check out <A=20
href=3D"http://www.fullsizechevy.com">www.fullsizechevy.com</A> and =
check their=20
forums for more info on it.</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=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:eric.deslauriers at oracle.com"=20
title=3Deric.deslauriers at oracle.com>Eric Deslauriers</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>Sent:</B> Tuesday, May 21, 2002 =
12:43=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: [Diy_efi] vortec =
engine=20
piston noise?</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=3D387283217-21052002><FONT color=3D#0000ff =
face=3DArial=20
size=3D2>Define rattling. My 93 5.7L Suburban rattled a bit after =
startup. About=20
10-15 seconds worth in hot weather (Southern AZ). It did this for =
237,000=20
miles until I traded it for my new one. At the end, the oil still came =
out=20
clean and nearly full after 3000 miles. Plus it rattled less, believe =
it or=20
not.</FONT></SPAN></DIV>
<DIV><SPAN class=3D387283217-21052002><FONT color=3D#0000ff =
face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D387283217-21052002><FONT color=3D#0000ff =
face=3DArial size=3D2>If=20
my '01 Yukon XL starts doing it, I'm not going to worry. =
</FONT></SPAN></DIV>
<DIV><SPAN class=3D387283217-21052002><FONT color=3D#0000ff =
face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D387283217-21052002><FONT color=3D#0000ff =
face=3DArial 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 color=3D#0000ff =
face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D387283217-21052002><FONT color=3D#0000ff =
face=3DArial size=3D2>Eric=20
D</FONT></SPAN></DIV>
<DIV><SPAN class=3D387283217-21052002><FONT color=3D#0000ff =
face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; =
MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">
<DIV align=3Dleft class=3DOutlookMessageHeader dir=3Dltr><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=20
should be some post about it or post a msg and they can help=20
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=20
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=20
miles. I thought it would quit at about 12K. It got worse. =
<BR><BR>I=20
contacted a service manager I was good friends with and he =
indicated the=20
problem was a loose bore in the engine and the pistons are rocking =
in the=20
sleeves. (piston slap). GM dyno'ed the engines until death and =
decided=20
that 150K was the life of the motor and these noisy motors would =
make it=20
there. <BR><BR>GM has a Techincal service bulletin on the issue =
and it=20
plan and simple saids "DO NOT REPLACE MOTOR" . <BR><BR>The service =
manager=20
told me a couple of farmers in his area would not take no for the =
answer=20
and drained the oil, blew the motor, put the oil back in and =
brought the=20
truck in for warrantty on a new motor. The factory uses different =
motors=20
than what goes down the mass assembley line so, you get a better =
motor=20
under warrantty. <BR><BR>I traded my 2001 for a 2002 after only =
30K of=20
miles. Mine rattled ALL the time. I could not stand it. Sounded =
like a=20
deasil. <BR><BR>Heres another bit of info. The corvettes had the =
same=20
problem. Loose bores. GM replaced the pistons only on those motors =
under=20
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=20
problem for the 2002 6.0. I have 12K on mine and it seems to have =
only=20
normal noises. <BR><BR>I have owned the 99 (first year for 6.0 in =
2500)=20
and 2001, and 2002 trucks. The 99's were the best year. I could =
run with a=20
North* cad with that truck. However, it was a 3/4 ton light and =
weight was=20
lower with the 6.0 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=20
it, how it's <BR>diagnosed, what it sounds like, etc., can you =
get back=20
to me 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 =
color=3D#000000 face=3DArial lang=3D0 size=3D3=20
FAMILY=3D"SANSSERIF"></BLOCKQUOTE><BR></FONT><FONT color=3D#000000 =
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lang=3D0 size=3D2=20
FAMILY=3D"SANSSERIF"><BR></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></FONT></=
FONT></BODY></HTML>
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