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Old 08-04-2008, 06:14 PM   #1
cuff
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1999 SL2
Default '96 head on '99 block?

I read the sticky at the top of this forum but I just wanted to double check. I have a burnt valve and found a '96 SL2 in a wrecking yard with a new head. Would this be a "direct" fit onto my '99 SL2 block? I know I have to get the exhaust manifold, but what about any other parts? Would I need the intake manifold since my '99 doesn't have a FPR on the line at the rail? Are the ports in the manifold for the injectors different?
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Old 08-04-2008, 07:12 PM   #2
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Default Re: '96 head on '99 block?

If your 99 has the aluminum manifold, just use that one. Otherwise swap over the fuel rail and injectors from the 99 onto the 96 manifold. I think you'll have to swap the throttlebody over too.
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Old 08-05-2008, 01:49 AM   #3
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1999 SL2
Default Re: '96 head on '99 block?

Thanks for the response. At $40, it's too good of a deal to pass up if it will work. I was cross referencing parts at the Advance Auto site and all gaskets, except exhaust manifold, exchange. So that tells me those will work if I swap certain parts. The only parts I'm finding that don't swap, according to the site, are the crankshaft and both cam sprokets. Does anyone know why that is? Is it simply the material or something that would screw up my plan like the number of teeth on the gears? The timing chain itself will swap though.
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Old 08-05-2008, 10:04 AM   #4
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Default Re: '96 head on '99 block?

Quote:
Originally Posted by cuff View Post
Does anyone know why that is? Is it simply the material or something that would screw up my plan like the number of teeth on the gears? The timing chain itself will swap though.

Its because the 99+ heads are narrower than the 91-98 heads. And the timing chain will not swap either. The 99+ DOHC chain is shorter than the 91-98 timing chain.

Also, if you're going to the trouble of taking everything apart and swapping, I'd install a brand new timing chain kit.
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Old 08-05-2008, 01:00 PM   #5
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1999 SC2
Default Re: '96 head on '99 block?

Out of less than idle curiosity, does anyone know whether the '96 or '99 head is a better design? Other than the ability to use the '92 exhaust header, does one head or valve design have a practical or performance advantage over the other?

The reason I ask is that I'm planning on doing a DOHC rebuild, and am debating whether to re-use my '99 head, or get an older one.
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Old 08-05-2008, 01:08 PM   #6
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Default Re: '96 head on '99 block?

From a performance standpoint, the older 91-98 heads are better.
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