3.4 dohc o2 sensor and spark plugs

[Shannen Durphey]

Yep.  GM moved to chains late in the life of the engine, but most of 'em had a
steel lower gear and a fiber upper gear.  When the fiber gear wears, it knocks
really badly.  Right before the gear fails, the knock is at its worst.  

The GM Performance Parts book lists a steel gearset.  I think I'd try one of those
if I were to own another 2.5.  BTW, you should see some of the things that have
been done with the super duty 2.5.

Shannen

Bruce Plecan wrote:
> 
> It's the timing gears,
> GM's has had recalls over the years to replace them, and some of the
> replacements were even worse then the ones they replaced.
> Bruce
> 
> From: <ae2598 at wayne.edu>
> > Ouch!  Shot down with the 'ol double-barrel!  Rodney Dangerfield must
> > drive an Iron Duke powered vehicle.. They sure don't get any respect!
> > Probably the hardest thing to explain to people is that even the healthy
> > ones sound like they have a severe rod knock.  Nobody I've talked to knows
> > why, but its generally accepted by those of us that have owned a few.
> 
> > On Mon, 30 Apr 2001, Gonyou, Jeremy (.) wrote:
> > > >Wow, all that for plugs, huh?  Makes me real glad our lumina is Iron
> Duke
> > > >powered!  Plug changes are trivial..
> > > But so is your power :)
> 
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