96-97 and 98-03 heads? whats the difference - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-11-2006, 11:46 AM   #1
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Default 96-97 and 98-03 heads? whats the difference

i know that the 96-97 heads are different from the 98-03 heads, but what is the difference? me and 1337ssei were talkin about possibly getting some 98-03 heads and slapping them on for better compatibility. good idea? will that work even?
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Old 03-11-2006, 01:00 PM   #2
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Default Re: 96-97 and 98-03 heads? whats the difference

Quote:
Originally Posted by ELMACHOGERACHO
i know that the 96-97 heads are different from the 98-03 heads
I don't think you have the years right. Somewhere in the 1997 model year the heads had the diameter of the spring seat reduced around the guide (that'* why the LS6 springs don't fit some earlier heads), also the head and valve seats was slightly reconfigured to reduce the likelyhood of cracking the intake and exhaust valves. Doesn't mean to say the later heads don't crack because they certainly do.

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