A friend just took delivery of an LS-2 vette, and is planning on trading
it back for a ZO6. He's already on the waiting list.
One of the reasons he wants to trade up is that he blew the rear end out
of the LS-2 with less than 5000 miles and no modifications to the
powertrain. You just shouldn't be able to do that. The ZO6 has a beefier
rear end in addition to the bigger engine.
The thing I didn't like about his car when I saw it was the whole
"keyless car" idea. I don't really want to always have to carry a remote
all the time, and I don't really want to just push a button to start the
car. But hey, that's just me. Other than that, its quite an impressive
I'm impressed that GM is able to push a small block to 427ci in a
production vehicle. What started as a 265ci design in the 1950's sure
has come a long way. Just hope it doesn't have the uneven cooling
problems like the 70's 400ci SB had. Anybody know if the cylinder
walls are 'siamesed' like the old 400??
Al, no matter what you read about this engine, it has nothing in common
with the old small block chevy engine. You can "call" it a small block,
but seriously, it is nothing like the old chevy engine. I've got one apart
at work, I'll have to take some pictures of it, so folks can appreciate
what a difference there is in design. The only similarity is the fact that
it's a "pushrod" engine.
From what little bit I've read about it, they sleeved the engine in order
to get the large bore...as opposed to cast in liners. I'll be very
if there aren't "issues" with this engine. Thankfully, not that many will
be sold out of our dealership, so we shouldn't have to deal with more
the one or two of them.
Thanks Ian, that makes sense. Guess I'm showing my age. Last time I
got 'intimate' with a SBC thay were still all cast iron, top & bottom
Yep, like anything, best to avoid the 'beta' version. I was
considering buying the upcoming new Impala but a new body AND a new
3.5/3.9 engine might just be asking for trouble. Gonna have to keep
the '99 Malibu a while longer (sigh).
Well, they still are....in some versions. The truck engines all have
cast iron blocks, except for one version of the 5.3 that appears
in the Trailblazers and the SSR (which is nothing more then a
two wheel drive Trailblazer). I've seen a few 6.0 litre engines
that also have cast iron heads....I assume that this is some sort
of heavy duty version. The 6.0 litre engines also seem to use
a superior head gasket when compared to the 4.8/5.3 truck
engines. But supposedly....they tend to be noisier (piston
slap) then the smaller engines.
I think that the 3.5 has "got" to be better then the engine
you have in the Malibu. The 3.9 looks like it has a number
of design changes even when comparing it to the 3.5.
Get something like a Buick Allure with the VVT 3.6 DOHC
engine. That's a Caddy engine, and I think it may just end
up being bullet-proof. Certainly no intake manifold gasket
problems to worry about.
The current "Gen III" v8 has no relationship to the small-block Chevy
based on the 265. It quietly went out of production several years ago.
The new engines (including the LS-1, LS-2, and 427) are all-aluminum,
have reverse-flow cooling, iron sleeves, and few or no interchangeable
parts with the old SBC.
The only response I can think of is "duh!" The question being addressed
was if the new 427 would have any of the problems that the larger
small-blocks (like the 400) had, not whether it would be a
pushrod-bender like the old Chevy big-blocks.
Even if the bore spacing hasn't changed, they could avoid the iron 400's
problems a number of ways. Getting to 427 with a smaller bore would be
one thing, plus using an aluminum block with liners could avoid the
cylinders actually being "siamesed" the way the 400's were.
"7-Liter" makes me think Ford 428 instead of Chevy. The high-performance
Galaxy 500s were tagged "7-Liter" for a while back in the 60s.
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