2004 GTO Head Bolts?
2004 GTO Head Bolts? I need some new head bolts for when I swap my cam and heads but I have been told 2 different things. 1 I have to take the bolt out first to make sure that I dont have a LS1 with short and long head bolts. 2. That no they are the short style head bolts. which is correct and were is a good place to get head bolts I was looking speed inc they have APR head bolts for 115 shipped? or can someone tell me were to get GM head bolts?
In 2004 GM swithced to uniform length head bolts. The confusion lies in the fact that some 2004 vehicles could presumably have the pre-2004 holes/bolts which involved more than one length.
Yea, I read that the switch was like in the middle of the production year. I had the same problem, had to pull the heads to find out.
I just took the heads off my 04 GTO ls1, and I have the early style (long and short). I wish I had the all short bolts because the arp short head bolts are just over $100 but the arp long/short bolts are about $170 :/ I just went with a set of new OEM GM head bolts for $50 because im on a budget lol.
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Flip a coin and order to have something on hand and hope you guessed correctly, or pull a cover and two bolts to be sure. We stock both the GM and ARP bolt/stud sets for both early and late model. Let us know if we can help!
Flip a coin and order to have something on hand and hope you guessed correctly, or pull a cover and two bolts to be sure. We stock both the GM and ARP bolt/stud sets for both early and late model. Let us know if we can help!
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Negative....the ones that "try" don't understand how their system works and will essentially be guessing as well.
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Joined: Dec 2004
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From: Miami, FL
Build date is printed on the driver side door panel sticker or the metal data tag affixed to the core support above the drivers headlamp
According to the GM book it is thus:
12498545 - 97-12/03 LS1 & LS6 Engine Head Bolts – 15.48 per head
17800568 – 01/04 – present LS1/LS6/LS2 Head Bolts – 14.95 per head
But....
From the GTO website where members posted their build dates and bolt types. Process of elimination provided the following dates:
Up to and including Feb 2004 it is first design
Some time in March 2004 is is second design
We do not know when in February or March the change occurred.
According to the GM book it is thus:
12498545 - 97-12/03 LS1 & LS6 Engine Head Bolts – 15.48 per head
17800568 – 01/04 – present LS1/LS6/LS2 Head Bolts – 14.95 per head
But....
From the GTO website where members posted their build dates and bolt types. Process of elimination provided the following dates:
Up to and including Feb 2004 it is first design
Some time in March 2004 is is second design
We do not know when in February or March the change occurred.
Last edited by Felix C; May 10, 2012 at 03:33 PM.
A good guess, but we've seen MANY build dates that have broken that "rule." I've personally seen as late as November 2004 use long/short bolts.
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COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
