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Is this normal??

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Old 11-20-2007, 01:56 PM
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Default Is this normal??

Are these factory clearancing marks? Or was something going on here? These are my stock 241 heads. If its not normal..what do you think caused it? http://i167.photobucket.com/albums/u...amaroSS016.jpg
Old 11-20-2007, 02:05 PM
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i don't believe those to be factory...i never have had 241s maybe its something on those? have you taken springs off maybe its gouged from a spring removal tool...looks like its cosmetic so no probs!
Old 11-20-2007, 03:22 PM
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Those are the rocker arms hitting the wall of the cylinder head. Are you running aftermarket rockers?

I went to aftermarket Yella Terras and when installing them, I noticed a couple of them would scrape the CH wall and wouldn't move freely. I took all of them off and using a Dremel grinder, ground down that same area for clearance.

Your valvetrain's gotta be noisy as hell running those like that.
Old 11-20-2007, 06:58 PM
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they might be from a hand held/manual valve spring compressor maybe?
Old 11-20-2007, 10:32 PM
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my 243s have them:
Old 11-20-2007, 10:34 PM
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sorry, new at images:
http://www.putfile.com/pic.php?img=7138779
Old 11-20-2007, 10:37 PM
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My 243's have them and they came off a 2003 Z06. I believe they are factory.
Old 11-21-2007, 12:31 AM
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Must be factory. All factory valvetrain and I highly doubt anything was changed. The springs that are in it now have red stripes?..the rockers also show no sign of rubbing
Old 11-21-2007, 12:47 AM
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Factory; nothing nefarious going on here.
Old 11-21-2007, 12:34 PM
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Just looked in the closet at the factory 241's that came off my 02 Camaro and they have those same marks on them.

Chad
Old 11-21-2007, 01:26 PM
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Originally Posted by chadtn
Just looked in the closet at the factory 241's that came off my 02 Camaro and they have those same marks on them.

Chad
Ok thanks for checking that out
Old 11-21-2007, 01:44 PM
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If your never cracked the valve covers I would say its normal, i'll be checking mine later this month.
Old 11-21-2007, 02:57 PM
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One more vote for factory....... My heads (241 & 243) have them.
Old 11-21-2007, 09:29 PM
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I have a set of 5.3 heads sitting on the floor behind me and they have the same marks. So has every set of LS1 heads I've ever worked on.
Old 11-21-2007, 11:08 PM
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Wow. That's interesting. My heads are Stage II Patriot LS6 style heads, which I think Patriot uses LQ9 truck heads and reworks them. Thing is, they didn't have the groove you guys are talking about. See pic, I had to go and grind down the wall of the head to allow enough clearance so the Yella Terras would clear the wall and not scrape.

Good thing I caught the problem as I was torquing the second set of rockers...
Old 11-21-2007, 11:24 PM
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They were on my 98 heads and on the 241 set I have now.




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