z24 code

[Mike Rolica]

Have you looked into a gm replacement 3.4l long block:  2.8 suck rocks,
small mains, bad rods ect.  A 3.4 would be a direct bolt in.  So if you are
going to do any computer mods, might as well do it with a 3.4 ;0)
Mike Rolica
Meridian Magnesium Products
Strathroy, Ont 
Ext. 260


	-----Original Message-----
	From:	Rodney Fulk [SMTP:elixir at pathwaynet.com]
	Sent:	Wednesday, December 15, 1999 11:18 PM
	To:	gmecm at efi332.eng.ohio-state.edu
	Subject:	Re: z24 code

	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.
	>
	>