New gm ls1 head bolt ?
New style 04-06 gm ls1 head bolt ? I bought a new 347 from tsp and i didnt know that since its a new ls1 block that i would need a diffrent type of head bolt. I gusse it needs a shorter type any was i know i need to get them but the ? then becomes do the head torqueing procedure diffrent? are they still torque to yeild bolts or are they just tightend in and walk away i really need some help
Last edited by KilerTA; Sep 9, 2006 at 07:20 AM.
The length of the bolt varies on LS1 blocks!
When I went in to purchase a set of ARP head bolts for my LS1 block, I was luckly enough that the speed shop knew about the this problem. In some cases the standard LS1 bolt kit would have worked, in other cases the LS6 style kit is needed.
To be safe, I bought both sets of head botls for my mechanic and he shop agreed to refund me the for the un-used set after my install.
Hope that helps.
When I went in to purchase a set of ARP head bolts for my LS1 block, I was luckly enough that the speed shop knew about the this problem. In some cases the standard LS1 bolt kit would have worked, in other cases the LS6 style kit is needed.
To be safe, I bought both sets of head botls for my mechanic and he shop agreed to refund me the for the un-used set after my install.
Hope that helps.
I know i need the shorter one i didnt realize that i need the shorter untill the big one bottomed out and there was still 6 inches of thread left lol i need the longer one but the ? is are they torque to yeild bolts? or are they just tighten them in ? or do i need to strech the bolts?
Mid '04 the bolts changed to all short bolts. I think the break was Feb built engines but could be wrong. I know mine took the same length bolts. They are torque to yield.
They also changed the water pumps over at the same time.
They also changed the water pumps over at the same time.
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A new block shouldn't need anything different than another block. When using torque to yield (stock) bolts, you cannot re-use them though. Either pony up the cash for some new ones or buy some studs.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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Originally Posted by Patrick G
A new block shouldn't need anything different than another block. When using torque to yield (stock) bolts, you cannot re-use them though. Either pony up the cash for some new ones or buy some studs.
Sorry, I don't know the answer though.
Originally Posted by KilerTA
Yeah thats what im asking
But IMO, I agree above, and go with the ARP studs. I wish I did studs right from the start now myself.
so does that mean the ARP set - ARP-134-3610 (Summit's number), the pro series, fit mine? found out today that all of the bolt holes are the same size and about 2 inches shorter than my old bolts, the new GM bolts that came with my Patriot heads and my ARP bolts I have now...
Originally Posted by Fedge
so does that mean the ARP set - ARP-134-3610 (Summit's number), the pro series, fit mine? found out today that all of the bolt holes are the same size and about 2 inches shorter than my old bolts, the new GM bolts that came with my Patriot heads and my ARP bolts I have now...
My block ended up using the 134-3609 set, which is what was an LS1 is 'expected' to use. If your bolt holes are a bit shallower, then yeah, I think thats the 134-3610 set.
In 2004 gm changed to equal length head bolts on the ls engines. I used ARP 234-4317 pro series studs. Once you go through the tedious gasket cleaning procedure once, studs make perfect sense.
Originally Posted by smask04C5
In 2004 gm changed to equal length head bolts on the ls engines. I used ARP 234-4317 pro series studs. Once you go through the tedious gasket cleaning procedure once, studs make perfect sense.
even MLS gaskets?
Originally Posted by Michael02hawk
You'll either need the 134-3610 or 134-3609.
My block ended up using the 134-3609 set, which is what was an LS1 is 'expected' to use. If your bolt holes are a bit shallower, then yeah, I think thats the 134-3610 set.
My block ended up using the 134-3609 set, which is what was an LS1 is 'expected' to use. If your bolt holes are a bit shallower, then yeah, I think thats the 134-3610 set.
already have the 3609's...shipping them back to Summit, my 3610's are on the way...the mods on these sites are right, the search function is my friend
thanks guys!
I would assume the same torque method would be used, pattern and torque, but I would just call tsp or someone and ask for a second opinion, I don't see why the pattern would be different, but maybe the torque is different i dunno
