[DMCForum] Re: Jeep Inline 6 (Robert)

["content22207" <brobertson@xxxxxxxxxxxx>]

According to online Jeep forums, you're off by 3 years (1999). They
also claim the only changes were on the topside (intake manifold,
head, and fuel delivery). This may be when fuel injection moved into
the head -- I had heard that Chrysler fuel injected the 258 in the
head, but when I looked at a mid 90's Jeep at a shop once the
injectors were clearly in the intake.  I couldn't find a single
reference of anything changing inside the engine. In fact, the Jeep
boys are rather emphatic that the "redesigned" 4.0 "Power Tech" is
pretty much the same 4.0 and that moniker more properly belongs to a 
totally new 3.7 liter V6 (which doesn't get good reviews BTW).

Bill Robertson
#5939

>--- In DMCForum@xxxxxxxxxxxxxxx, "therealdmcvegas" <dmcvegas@xxxx> wrote:
> If you're talking about the straight six, it is NOT the same motor. 
> 1996 was the final year for the AMC design. The block itself was 
> completely redesigned, is much stronger structurally, and has better 
> vibration dampening, although the heads are interchangable.
> 
> It's a damn fine engine, that's pretty easy to work on, and straight 
> forward. The old Magnum 2.5 that they canceled was literally the same 
> engine, with 2 cylinders lopped off. I have that one in my Dakota. 
> Everything is in reach, and is easily accessable.
> 
> If I end up keeping my truck, a swap over to an I-6, with a 6-speed 
> gearbox is definetly a long-term goal. An engine swap on a truck I 
> already like is a far cheaper alternative than buying a new pick-up.
> 
> -Robert
> 
> 
> 
> --- In DMCForum@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> 
> wrote:
> > That's because it is the old AMC 232/258. One of the single best
> > engines ever built. In a fit of genius Chrysler threw away their 225
> > when Lee Iacoca reinvented the company. We all know the sad story of
> > its aluminum replacement (that's the reason Chrysler resorted to the
> > PRV in the LH platform, which was designed by former AMC people 
> BTW).
> > When Chrysler bought AMC they were smart enough to drop fuel 
> injection
> > on the 258 and keep using it all the way until 2004.
> > 
> > You can't kill a 232/258. I don't think you could even hurt it
> > intentionally. The things are truly indestructible.
> > 
> > Do you realize the engine in your 1998 Jeep is a 1964 design? Fuel
> > injection is of course late model, but that's in the intake manifold
> > only. Rest of the block is pure vintage quality design. It's also a
> > torque monster -- something like 215 lbs at no more than 1,800 RPM.
> > 
> > Bill Robertson
> > #5939
> > 
> > >--- In DMCForum@xxxxxxxxxxxxxxx, DMC Erik <dmcerik@xxxx> wrote:
> > > A quick chime in on the Jeep mention.  My parents bought a new 
> Jeep
> > Cherokee in 1998.  Its the biggest work horse I've seen!  That I-6 
> has
> > hauled more deloreans across country...hauled more (fill in the 
> blank)
> > on our flatbed trailer than I can remember.  The thing even hauled 
> the
> > original D-rex from Texas to Chicago through the mountains.  Sure, 
> we
> > weren't going 80MPH through the mountains, but a nice steady 55mph 
> got
> > us there and back with no issues.  When my dad found out they were
> > cancelling the Cherokee he shook his head in disbelief.
> > > 160K miles later the 1998 Cherokee is still going along, as good 
> as
> > it was when it was new.
> > >  
> > > erik
> > > 4512
> > > 
> > > 
> > >  
> > > 
> > >  
> > > 
> > >  
> > > 
> > >  
> > > 
> > > Once upon a time before the Cherokee got canceled (and now 
> brought 
> > > back), the I-6 engine was able to fit in both the Cherokee, and 
> the 
> > > Wrangler. And even the Commanche pick-up truck once upon a time 
> ago. 
> > > It's a great engine, but what else could you shove it into 
> because of 
> > > it's length? So when the time comes to retool, it gets dumped in 
> > > favor of more compact engines that are used on multiple 
> platforms. 
> > > And many Jeep owners (including myself) are not happy about the 
> > > demise of such a rugged, reliable engine. But Jeeps keep selling, 
> so 
> > > it's not a loss of profit motivation from consumer input. It's 
> just 
> > > what's cheaper in the long run, despite customer loyalty in many 
> > > cases. Kinda like the F-body too...
> > > 
> > >             
> > > ---------------------------------
> > >  Start your day with Yahoo! - make it your home page 
> > > 
> > > [Non-text portions of this message have been removed]

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