2007 silverado heads
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Staging Lane
Joined: May 2017
Posts: 83
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From: Wisconsin
2007 silverado heads Ive read a lot of information on cylinder heads, but I want to be sure before I buy them. I found some in a junkyard and asked the guy what the casting number was and he told me the numbers he had were 12564825, now is that a 799 head or something different? Thanks
TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
And just to add to brandon6.0's post, 799's and 243's are identical functionally. I believe the difference is, 243's are die-cast, and 799's are sand-cast. Neither is an advantage, just two different casting methods.
Oh bouy. Well need more information to give you accurate answer to your question.. Here's why 2007 had one of the widest applications of engine option . There were 2 body style in 2007 , nbs and nnbs or recyclers call classic and new . Classic 5.3 will have 862/706........... a nnbs 5.3 will have 799/243 .The casting number is only 3 or 4 digits in the case of a L92s .The numbers the junkman gave you is a gm part number for a bare 243 head , so go figure that one.
Thread Starter
Staging Lane
Joined: May 2017
Posts: 83
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From: Wisconsin
The heads should have the casting number on them, right? I wasn't sure why he gave me that number, I figured he'd look at the heads and find the number, unless they're still in the truck and he was busy.
The casting number is located in the lower right corner ,just outside the valve cover rail wall. If the engine is still in the vehicle it's easy to see from the passenger side , as it will be towards the front of engine. On the left side it's usually more difficult to see as it will be close to the firewall. Request the yard to shoot a pic , and send it to you , I always verify before I buy !
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Staging Lane
Joined: May 2017
Posts: 83
Likes: 0
From: Wisconsin
