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Next, disconnect the sensor plugs off the throttle body, pull off the coolant lines going to the bottom of the throttle body, disconnect the throttle cable and pull off the cruise control cable, as well as the cable bracket, if you have it, corvettes will have no throttle cables or bracket as they are fly by wire. If you have a C5, unscrew the airbridge where it connects to the throttlebody, then unscrew the clamp where your maf goes into your air filter assembly.remove the whole tube/maf piece and set it aside. If you have an F-body, just loosen the screw on the intake tubing going to the throttle body, unclip the lid, and pull it all off in one piece.
#Ls6 intake manifold install#
Some pictures from this install will be from an F-body, some from a C5, however, none of the car differences will matter in the photographs.įirst step is to remove the air intake/maf assembly. Note: f-body specific instructions will be blue, andĬ5 specific instructions will be green. To the "LS6 manifold" and pipes will also have the new coolant vent tube. NOTE: You must have the 2001+ style coolant vent tube as well for the LS6 valley cover to fit! All 2001+ LS1's will have this, and any LS1's that have upgraded We will do this all for about $65 in parts (or $120+ if you buy the LS6 pcv hose rather than constructing one yourself as I show below). In this writeup, I'll show you what all is needed to convert your LS1 over to the new LS6 style PCV setup. This is the cover that resides under the intake manifold, and sits between the 2 cylinder heads. The LS6 setup pulls the pressure not from the valve cover, but from the VALLEY cover. The LS1 system just happens to force oil along with the air as well, so GM seemed to take a stab at fixing the issue with the LS6 system. The oil consumption issue seems to be one of the most common issues on all LS1's out there, and this is due to the way the stock PCV (Positive Crankcase Ventilation) system is setup.Ī PCV system is designed to force any positive crankcase pressure into the intake manifold, rather than continue allowing the engine to build up pressure inside. There's the oil pumps that randomly die, the rod bolts that randomly break, roller rockers that randomly lose their bearings, and the oil consumption issue that seems to haunt some and not others. Many LS1 owners are faced with a few issues. None needed (valley cover comes with new gasket already) 1 5/16" vacuum cap, if your LS6 cover doesn't come with a red one pre-installed 10 inches of 5/16 ID Rubber fuel line from autoparts store OR 1x GMPN 12568010 (expensive!) Dremel with 5-10 small fiberglass reinforced cutoff wheels LS1 to LS6 PCV conversion E-mail jmX with corrections Click here for a printable version Tools Needed: