Which head bolts i need ??

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Feb 14, 2011 | 08:26 PM

deangoodin

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From: STATESVILLE N.C

Which head bolts i need ??

I have ls2 alum block ,ls1 cath heads which head bolts do i need ???

Feb 14, 2011 | 09:22 PM

LS1MCSS

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Quote:

Originally Posted by deangoodin

I have ls2 alum block ,ls1 cath heads which head bolts do i need ???

Stick something down in the head bolt holes to see if all of the big ones are the same length. If they are, order the bolts accordingly. There are only two types. One has all the big bolts the same length and the other type has two different lengths.

Feb 14, 2011 | 10:01 PM

TransWS6Am

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From: Battlecreek, MI / Mansfield, OH

2004+ blocks the big bolts are all the same length (LS2,LS3,LS7, ECT.)
PRE 2004 Blocks have the short and long big bolts (LS1, LS6)
Thats according to ARP.
I'm missing something though, didn't the 04 gto have an LS1? So wouldn't it have long and short bolts?
anyway, id say its safe to say all LS2's have the same length big head bolts. can someone confirm??

Feb 15, 2011 | 02:59 AM

redhotwheel98

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i believe he is right on all ls2s should be the same length

Feb 15, 2011 | 07:03 AM

ND400

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Ls6 headbolts is what arp list them as mate. All gen4 engines use ls6 headbolts.

Feb 16, 2011 | 09:08 PM

deangoodin

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From: STATESVILLE N.C

thanks guys the big bolts were the same,call s& d yesterday and they are on the way,thanks again

Feb 16, 2011 | 10:03 PM

GTO1_OHIO

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Quote:

Originally Posted by TransWS6Am

The early 2004 GTOs, like mine with a DEC 2003 build date, have the older short and long bolts. They switched to the all long bolts in the LS1 GTOs sometime in early 2004. I'm not sure of the date.