z24 code

[Rodney Fulk]

Not sure if the worn out A/C compressor had anything to do with it but...
(Had shavings on the frame below it.. And the A/C doesnt work..)
I was on a trip to detroit and had to stop due to a gravel truck being
turned over.
It was close to 100 degrees that day and I noticed a puddle under my car..
Water pump was toast..
Heated up the motor..
To make a long story short... After I replaced the water pump the car would
overheat after I shut it off..
A mechanic looked at it and told me it wasnt worth fixing. But didn't tell
me what was wrong with it.
The ONLY symptom was as soon as I turned it off it would overheat and water
would come out of the
over flow tube.
While running it would be fine...
Has 128,000 miles on it..
Another mechanic said "Well heck, maybe the thermostat is stuck.".
So I attempted to change the thermostat...
Ended up breaking one of the bolts off in the intake..
And it has sat everysince...
Block is probly ok..
Probly just needs a head gasket.
But if I have it apart anyhow I will likely build it up... ;)
Would be nice to be able to reprogram the computer it has for the upgrades
but doesnt look like it will be simple to do..

----- Original Message -----
From: <dhardin at ovec.com>
To: <gmecm at efi332.eng.ohio-state.edu>
Sent: Wednesday, December 15, 1999 7:32 AM
Subject: Re: z24 code


> I believe that you are correct.  The ARDC code should work in the 89.  The
89
> however may of had some tuning changes etc and that is why the ardc was
not used
> that year. I believe that both years use the 730 computer.  Mine runs
really
> well.
> BTW ....what happened to the 2.8?  Its pretty hard to kill one.  They run
great.
> I rebuit mine after 190K miles and the only thing that was wrong with it
was the
> timing chain was slapping around.  When I got it apart you could still see
the
> crosshatch honing marks on the cyl. walls.  The bearings had wear, but
were
> good, the cam seemed to be ok.  I was amazed.  I would probably made it to
250K,
> but the timing chain might have eventually skipped.  Anyway I went ahead
and
> rebuilt it using the 1985 model year pistons because they were flattops.
> However I had to put copper shims under the heads to keep the compression
> reasonable.  Without them I would have had about 12:1 CR.  A little to
high.
> Now I've got about 10.8.  I really wanted about 10, but that is close.  I
used
> the MPG camshaft from NAPA.  Basically that cam is stock with the "EGR
effect"
> removed.  I wanted a smooth idle for a daily driver.  The rest of the
engine
> went stock.  I also rebuilt the 125C.  All together I spent no more than
$1100
> on both engine and trans.  Also put the Gill Younger shift kit from NAPA
in the
> trans.  I highly recommend that.  It's only about $10.   I made the tuning
> changes to the ARDC and WOW it's got power.  Of cource it ran great stock,
but
> the high compression really helped it.  I imagine it would really have
some good
> power if I went radical with the cam, but I hate the rough idle.  Besides
I got
> a 68 GTO for that kind of stuff.  Anyway I only burn 87 octane, no
problem.
>
>