First off, if anyone knows, when reassembling the cylinder head on an EcoTec, the hydraulic lash adjusters, are they installed "dry" with just a coat of oil on them, or are they recommended to be installed fully "pumped up", as in soaked in oil for days to let all the air out of the lifters???
Secondly, I'm using the Cobalt SS head gasket on the 2.2 Ecotec, with ARP head studs. Is the same torque down specs recommended for either head gasket???
Thanks for any and all info.
Currently #4 in Ecotec Forced Induction horsepower ratings. 505.8 WHP 414WTQ!!!
Currently 3rd quickest Ecotec on the .org - 10.949 @ 131.50 MPH!!!
Yes, it's a good idea to immerse new lash adjusters in oil, but in practice, they do pump up pretty quickly once they see oil pressure upon engine startup. If the engine's been run previously, this step can be omitted, as the followers will already be oil-filled.
The SS headgasket is close enough to the 2.2 to not require any different procedure. Follow ARP's instructions on torquing, for this is more about the fastener being correctly stretched than the type of gasket used. A note...always make sure your torque settings are achieved while the torque wrench is "on the move". If you have to stop to reset the position, and the wrench then clicks before the nut starts moving again, loosen it slightly and take another shot at it. For best results, torque in three steps, starting at the middle studs and working your way outwatds in a spiral motion. Count the nuts as you tighten them so you don't miss one. Never tell yourself you are so good you don't need to count them...I've been torquing heads down for 40 years (yes, I am only 47, so I did start early, it was a family thang!), and I still count the nuts as I torque.
Enjoy!
Bill Hahn Jr.
Hahn RaceCraft
World's Quickest and Fastest Street J-Bodies
Turbocharging GM FWD's since 1988
www.turbosystem.com
Thanks Bill, I appreciate the quick reply!
Currently #4 in Ecotec Forced Induction horsepower ratings. 505.8 WHP 414WTQ!!!
Currently 3rd quickest Ecotec on the .org - 10.949 @ 131.50 MPH!!!
