2004 changes from 2002-03 Z06's?

[george]

I was just asked what's the difference in the 2004 Z06 from the 2002-03's
Z06 models.

I thought I read something had been upgraded or changed to the fuel system and something about the suspension. Nothing major but can't recall any other mentionable changes. Any info appreciated.

Happy New year

[proexpert]

Shocks were new in 2004, that's all I can remember.

[DennyM]

Off the top ... and to add to Steve's post ... they also changed the durometer of the rear bushings (harder).
In 2003 they had a running change to FFS in-tank fuel pump (around Nov '02) and to steel shift forks (around Feb '03) Any '04 would have these changes.

[george]

Originally Posted by DennyM

Off the top ... and to add to Steve's post ... they also changed the durometer of the rear bushings (harder).
In 2003 they had a running change to FFS in-tank fuel pump (around Nov '02) and to steel shift forks (around Feb '03) Any '04 would have these changes.

Thanks. Fuel tank components that was it. I remember the change on the shifiting forks from 02's. Had no issues with mine. Didn't know about the bushings at all. Did recall the shocks once reminded as earlier thread mentioned.

At least the C5 Z06 hartops don't have any C6 Flying roof issues. I hope that has been resolved. Imagine going down the track and having your roof lifting off ?

Happy New Year friend

[proexpert]

From Dave Hill about the 2004 Z06:

… a very very special Z06, that I believe the Z06 crowd is gonna be very happy with [not only] the commemorative Z06, but all of the Z06’s in 2004, cause, while they all don’t all have the hood, and they don’t all have the wheels, and they don’t all have the graphics, they all got the suspension. It makes a surprising upgrade to the car, in the area of performance, that Z06 people really appreciate.

[Jim Lembo]

I also think that GM straightened out the PCM a bit, because 2004's seem to make more rwhp bone stock than any of the earlier models. FRCTom may have something to say about this, but from what I have seen, it seems to be true!

Jimbo

[z06nut]

Battery posts were moved back to the top. '03's had side posts

[Melsy]

Also the Z06 came with specific Sachs shock absorbers (suppose to be great) and they removed the aux electrical connector from the passenger footwell.

[dennisZ06]

top post battery
shocks
front upper control arm bushings
pcv replaced by orifice
thermostat and housing
iridium spark plugs
red spark plug wires
head bolts changed to all the same length(short)12/03
valve springs(same as ls-2/ls-3)
ls-6 sticker on throttle body
aux.power hook-up in passenger footwell removed
steel trans.shift forks(mid 03 model year)
fuel system(late 03 model year)
clutch slave and master
pcm and o2 sensors
A&B pillar interior pieces
rear sway bar bushings
i found this info from various sources. if your sure something is wrong please correct me. this is a list i started when i traded my 01z in for my 04z a year ago

[ZO6 AL-X]

^ That sounds about right.