This is GM's third attempt to mitigate the oil consumption issues plaguing LS1 engines and 1999-2013 LS engine trucks. For some reason the engine eats oil through the PCV setup and people who run catch cans catch a significant amount of oil. For millions of engines that don't it pools up in the intake. I was surprised when I pulled the intake manifold on my truck to see oil weeping out of the intake runner outlets.
New GM valve cover. Includes new gasket and grommets. Part number 12570427 for 2009-prior LS engines which has the hose connector barb for the PCV tubing. 12642655 is for 2010-2013 LS engines which uses a push on fitting connector.
Underside of the valve cover. Compare to the original cover the new cover has less openings and protruding tabs over the single opening to mitigate oil splashing mixing with the blowby fumes...eh
New valve cover features and revisions:
Compare to the old version:
The orifice is now integrated into the valve cover:
Production date as fresh as it gets (Oct 06, 2015.) I like my valve covers free range, vegan and GMO-free fed with the highest quality ingredients:
LM7 valvetrain pic with 140,400mi on it. I Lexus V8's:
4th PCV valve grommet junk already:
Inside the PCV baffle in the valve cover:
Whoops no finished pic but it's easy than baking a pie. You need a 10mm socket to remove 5 bolts then move the coil packs out of the way and a 5/16" socket to remove the 4 valve cover bolts. Clean gasket mating surface. Then installation is the reverse of removal.
New GM valve cover. Includes new gasket and grommets. Part number 12570427 for 2009-prior LS engines which has the hose connector barb for the PCV tubing. 12642655 is for 2010-2013 LS engines which uses a push on fitting connector.
Underside of the valve cover. Compare to the original cover the new cover has less openings and protruding tabs over the single opening to mitigate oil splashing mixing with the blowby fumes...eh
New valve cover features and revisions:
Compare to the old version:
The orifice is now integrated into the valve cover:
Production date as fresh as it gets (Oct 06, 2015.) I like my valve covers free range, vegan and GMO-free fed with the highest quality ingredients:
LM7 valvetrain pic with 140,400mi on it. I Lexus V8's:
4th PCV valve grommet junk already:
Inside the PCV baffle in the valve cover:
Whoops no finished pic but it's easy than baking a pie. You need a 10mm socket to remove 5 bolts then move the coil packs out of the way and a 5/16" socket to remove the 4 valve cover bolts. Clean gasket mating surface. Then installation is the reverse of removal.