No thoughts on this? I'm having the same problem with my 99OB 2.5 DOHC after a rebuild. Hey Paur4s, what mark did you use on the crank sprocket when you turned it 180. I guess the crank keyway was then at the 12 O'clock position when the cam gears lined up with their marks?Follow-up to Replaced Head Gaskets; engine won't start
After weeks of searching through posts on this site and elsewhere and not finding the answer to my problem, I used my own logic to finally resolve the issue. I had spark, fuel and compression and my DOHC 2.5L would not start. It did crank, but would not start. I kept feeling like it was a timing issue, but everything I read said if all of the timing marks are all lined-up, it can't be miss-timed. After trying numerous other avenues i.e., using TDC on crankshaft by mistake, fuses, electrical components, fouled plugs, weak ignitor, bad wires, low fuel pressure, broken crank gear tab, bad crank position sensor, bad cam position sensor, bad wiring, loose ground, plugged exhaust, bent valves, bad neutral safety switch, bad ignition switch etc..., I kept coming back to the timing issue in my gut. I don't have a 3D model to work with to see the position of each piston in relation to each cam and the sensors, but it seemed to me that it DID matter where the #1 piston was in relation to everything else. It also made sense to me that if the cam pulleys lined up to the marks correctly and if I just rotated the crankshaft 180 degrees and lined-up those marks, I would effectively move the #1 position back into synchronization with the camshafts. Well, it worked!
I will let the "experts" say it isn't so and try to tell me the engine can't be out of time if all of the timing marks are lined-up either way, but I know what worked for me.