The 5.3 in trucks has an iron block---5.3 in Trailblazers, Envoys, and others
is Alloy----the problem is mostly piston slap as I understand it---I have never
heard of one failing,,,If you force GM to change it most likely will still be
there and you will have agreed that nothing else will be done---I have heard
of people being able to get and extended warranty out of it---my recomendation
if it just drives you crazy----I have never heard of being able to stop it
completely---Mobil 1 will help some I have been told.---wmts
-----Original Message-----
From: John Beckett [mailto:saltracer@servusa.com]
Sent: Saturday, December 27, 2003 7:04 AM
To: land-speed@autox.team.net
Subject: Re: Piston Slap ? Non LSR
Well there you go, I would have voted for piston slap and told Bill that
they should fix it. Never considered that the 5.3 was an alloy block.
Wonder if cutting the outer edge of the piston top by .020" would help
eliminate the problem?
JB
----- Original Message -----
From: "Dave Dahlgren" <ddahlgren@snet.net>
To: "bennevl" <bennevl@netzero.net>; <land-speed@autox.team.net>
Sent: Saturday, December 27, 2003 7:32 AM
Subject: RE: Piston Slap ? Non LSR
> Found this one as well and makes the most sesnse so far it about halfway
> down the page. With an alloy block it grows about 0.015 inches from cold
to
> hot. If the bearings are loose fit as this suggestes then the piston can
hit
> the carbon on the heads with the engine cold as they are 0.015 closer.
> dave
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