Is this normal??

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Nov 20, 2007 | 01:56 PM

LS1Silverado05

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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

Nov 20, 2007 | 02:05 PM

bowe1632

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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!

Nov 20, 2007 | 03:22 PM

BigBirdTA

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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.

Nov 20, 2007 | 06:58 PM

JPH

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they might be from a hand held/manual valve spring compressor maybe?

Nov 20, 2007 | 10:32 PM

massls1guy

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my 243s have them:

Nov 20, 2007 | 10:34 PM

massls1guy

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sorry, new at images:
http://www.putfile.com/pic.php?img=7138779

Nov 20, 2007 | 10:37 PM

NewJerseyBandit

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My 243's have them and they came off a 2003 Z06. I believe they are factory.

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Nov 21, 2007 | 12:47 AM

Dan_the_C5_Man

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From: Atlanta area, GA

Factory; nothing nefarious going on here.

Nov 21, 2007 | 12:34 PM

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chadtn

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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

Nov 21, 2007 | 01:26 PM

#11

LS1Silverado05

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Quote:

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

Nov 21, 2007 | 01:44 PM

#12

BlackScreaminMachine

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If your never cracked the valve covers I would say its normal, i'll be checking mine later this month.

Nov 21, 2007 | 02:57 PM

#13

blkbird

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From: san antonio, tx

One more vote for factory....... My heads (241 & 243) have them.

Nov 21, 2007 | 09:29 PM

#14

5.3LJimmy

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From: Napoleonville, LA

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.

Nov 21, 2007 | 11:08 PM

#15

BigBirdTA

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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...