Just Discovered New 243 Heads!!
Just Discovered New 243 Heads!! I dont know if this has been covered, but I have a 2013 Chevrolet Silverado 5.3 Liter and today I was looking to see if I needed to change the oil already and I found the 243 stamp on the head!! There isnt another version of 243's out there are there? And if this is the same 243 that everyone looks for, is this the new vehicle to be looking for at the junk yard??
I dont know if this has been covered, but I have a 2013 Chevrolet Silverado 5.3 Liter and today I was looking to see if I needed to change the oil already and I found the 243 stamp on the head!! There isnt another version of 243's out there are there? And if this is the same 243 that everyone looks for, is this the new vehicle to be looking for at the junk yard??
Good deal, I guess Im slow on this game. At the track in San Antonio in february, SDPC said that GM stopped making 243's, I guess this is proof they were wrong. Thanks for the update guys
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Joined: Sep 2009
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From: PA/MD
I dont know if this has been covered, but I have a 2013 Chevrolet Silverado 5.3 Liter and today I was looking to see if I needed to change the oil already and I found the 243 stamp on the head!! There isnt another version of 243's out there are there? And if this is the same 243 that everyone looks for, is this the new vehicle to be looking for at the junk yard??
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Staging Lane
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On The Tree
Joined: Aug 2012
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Hey guys I've got a 2007 suburban 2500 6.0 liter. I have no idea what heads are on there I gotta check, but would I see any benefit to putting 799 or 243 heads on here? I'm looking for more power this thing tows like a dog.
You probably have 317 heads, they flow similar to 243/799 castings, but have larger combustion chambers. 243/799s would give you a nice bump in compression. If you have the LQ4 motor, 243s should raise to around 10:5, LQ9 would be around 11:1
TECH Fanatic
Joined: Aug 2011
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From: Marengo, Ia
All 243 heads are the same casting and 799's are nearly identical also. The only 243's that have the light weight hollow intake and sodium filled exhaust valves are one's that came on LS6 motors. All of this info is readily available so stop asking about it and just look it up.
On The Tree
Joined: Aug 2012
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How would you tell if you didn't know the origin of the heads?
All 243 heads
are the same casting and 799's are nearly identical also. The only 243's that have the light weight hollow intake and sodium filled exhaust valves are one's that came on LS6 motors. All of this info is readily available so stop asking about it and just look it up.
are the same casting and 799's are nearly identical also. The only 243's that have the light weight hollow intake and sodium filled exhaust valves are one's that came on LS6 motors. All of this info is readily available so stop asking about it and just look it up.
That is new body style so its a L76 .... the heads will be L92 just look for the following casting numbers 2716 , 5364 or 823. Don't change the heads something else is wrong, it should pull strong.
On The Tree
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Pull strong as compared to what? My trailer/race car is 8000 lbs and going up hills I need to bury my foot just to maintain speed. What I'd really like to do is put a diesel in this thing. It's pathetic that nobody makes a diesel suv these days.
I don't get why GM dint offer the dura max in the suburbans, that would be a sweet rig if they would have! Hopefully soon they will bring the 4.6 duramax proto back to testing and offer it in suburbans and 1/2 ton trucks and Tahoe!