i'm new to the forum, and new to the cobalt. this is my girlfriends car, it's a 2007 cobalt LS, 2.2l ecotech.
it recently blew the headgasket, so i went about tearing the motor down to remove the head to send to the machine shop.
first mistake i made(was in a big hurry...) i didnt make sure the car was at Top dead center on the compression stroke.
so now i need to figure out HOW to get the crankshaft and pistons to top dead center on the compression stroke, with the head removed.....i could just put it at TDC, but how do i know if it's on the compression stroke? does it matter?
after i do that, i can install the newly machined head, gasket, and bolts.
but then i need to figure out how to get the camshafts back in the proper positions.
what i'm wanting to know is how the heck do i tell where the cams are(position wise...) i'm pretty sure i can do this, if i knew which valves were open/closed at the position they should be in, which is the intake sprocket diamond at 12 o'clock.
or could i just, put the #1 piston at TDC...then install head and rotate cams until all valves are closed on cylinder #1 then install timing chain properly and call that TDC on the compression stroke?
---------- Post added at 12:09 PM ---------- Previous post was at 12:07 PM ----------
i'm totally new to DOHC engines, i have rebuilt a few old Toyota motors, 20R,22R, and 3vze.