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head bolt issue

Old 07-14-2007, 02:01 AM
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Default head bolt issue

I'm building a 6.0L for my 98 trans am, I went to bolt the heads on today and the bolts are too long. they're the same length as the ones in my LS1, so i turned my attention to the holes in the block. The ones in the LS1 are a full 1 1/4 deeper than the 6.0l. I bought the block as a new casting last fall. Do newer 6.0L take different bolts? anyone else ever had this problem?
Old 07-14-2007, 04:45 AM
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How new is the 6.0L engine? I checked the p/n for an LS1 and an 03 6.0L and they are the same.
Old 07-14-2007, 02:38 PM
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I bought it as a new casting last fall, i did the same thing i checked at the local parts store and gm, they both had the same part number.GM even told me the length and it is the same as the bolts i have.
Old 07-14-2007, 02:55 PM
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the 04 and up blocks require different bolts.
Old 07-14-2007, 02:57 PM
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the old ones are 12498545 short and long. the newer style are same size, dont remember the part number.
Old 07-14-2007, 04:24 PM
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thats what i wanted to know thanks.


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