You are welcome Paul. With big block mopars, about the worst that happens
is the timing gets really messed up and it runs like crap. If there is a
catastrophic failure and it slips a tooth it might quit running. On some
brand X cars (mainly imports but I know it happened to an Olds 350 once) the
valve train can actually contact the piston if they get out of sync due to a
timing chain problem. Can you say EXPENSIVE!
Kerry
----- Original Message -----
From: <RandalPark@xxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Friday, December 05, 2003 4:23 PM
Subject: Re: IML: IML DIGEST rebuilding 440 in 1968 Crown
> Kerry,
>
> Thank you for the information. I was aware that the timing set could be
easily replaced as I have done it on two of my brand "X" cars myself. I just
hadn't heard anything about this for a long time. Back in the late '70s this
problem took many of our cars off the road for good, since even though it
was an easy repair, at that time our cars weren't worth the $500.00 repair
bill it would have taken to fix them, so many were junked.
>
> Paul
>
> In a message dated 12/5/2003 5:18:40 AM Eastern Standard Time, "Kerry
Pinkerton" <pinkertonk@xxxxxxxxx> writes:
>
> >Paul, replacing the timing gears/chain is not usually called an overhaul
as
> >it is frequently done standalone. However it is usually done as part of
an
> >overhaul. It's a pretty simple process and can be done with the motor in
> >the car. You are correct about the plastic coated timing gears. My 73
> >Imperial (now owned by Phil Brust) had many chipped and broken teeth when
I
> >replaced them at about 120K. This process is documented at:
> >
> >http://imperialclub.com/Yr/1973/Kerrys73saga/73part20.htm
> >
> >Kerry
> >
> >----- Original Message -----
> >From: <RandalPark@xxxxxxx>
> >To: <mailing-list@xxxxxxxxxxxxxxxx>
> >Sent: Thursday, December 04, 2003 11:48 PM
> >Subject: Re: IML: IML DIGEST rebuilding 440 in 1968 Crown
> >
> >
> >> I have a question regarding this topic. It has been stated here that
with
> >only 114,000 miles that it is unlikely that the engine has been over
hauled.
> >>
> >> Back when they were still quite new, I remember several early 440
> >Imperials ('66, '67, &'68) experiencing a failure in the timing gears
and/or
> >timing chain right around 100,000 miles. When disassembled, the problem
was
> >usually due to the excessive wear in the synthetic coating on the teeth
of
> >the gears.
> >>
> >> I haven't heard much about this on the IML since I have been reading
here
> >since July. I have driven some newer cars that have done this as well,
but
> >at much higher mileage. Has anyone experienced this with their cars?
> >>
> >> Paul
> >>
> >> In a message dated 12/4/2003 3:21:11 PM Eastern Standard Time,
> >dardal@xxxxxxxxxxxxxxx writes:
> >>
> >> >
> >> >
> >> > Quoting Kate Triplett <ad_ablurr@xxxxxxxxxxxxxxxxxxxxx>:
> >> >
> >> > > This thread is of considerable interest to me - I have as yet been
> >unable to
> >> > > obtain any previous maintenance records for my '68 Crown other than
> >the few
> >> > > receipts that "came with" in the glove box. The car does run
> >splendidly with
> >> > > nary a ping on 89 octane gas, though, so I suspect the engine has
been
> >> > > through an overhaul once in its life - mileage is now just over
> >114,000. I
> >> >
> >> > With only 114K, its unlikely that the engine was rebuilt, unless it
> >suffered a
> >> > catastrophic failure. The factory timing specs were often a bit
> >conservative,
> >> > and that might explain why it does not ping. Also, you may not be
> >advanced all
> >> > the way to the recommended 8 degrees. Most pinging problems in these
> >old cars
> >> > are more likely to be related to deposits due to too much city
driving
> >and not
> >> > enough high speed.
> >> >
> >> > >
> >> > > Did the dealers do a "warranty" change to these cars when the fuel
> >changes
> >> > > took place, or was the timing such that it was strictly after
market
> >> > > rebuilding?
> >> >
> >> > When unleaded gas was phased out, the 68 model year was long done
with
> >its
> >> > warranty.
> >> >
> >> > D^2
> >> >
> >> >
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