Trying to set mechanical timing on a KA24DE i'm putting together and i'm having piston to valve contact with the exhaust valves. I bought a brand new timing chain set and it matches the OEM set that was on the engine when i got it. timing marks on the sprockets are the same, not sure about the actual chain itself because the original marks are worn off.

Here you can see the timing when lined up to the existing marks




However like i said when lined up the engine will not turn, and the exhaust valves are hitting the pistons. I know this because the first time this happened i pull the head off and you can see the tops of the pistons were marked up where the valves hit. To fix this i had to advance the engine 2 chain links (advanced by 1 link didn't work). Now the engine spins over freely but i have no idea where TDC is now.


The colored link is now facing down (it's a little hard to see in the pic)

Anyone had this happen before?

Crank is out of an altima KA24DE, the original one was fucked due to a spun bearing, but the casting numbers are the same "30R" and has the center ring for the flywheel. Monday i'm going back to the machine shop to pick up my old crank to see if the sprocket on it is any different.
JayZeeSilvia Posts: 24Joined: Sun Feb 13, 2011 11:37 am

 

It's not turning, because it isn't lined up correctly. I can see your #1 connecting rod cap all the way down. You're 180 degrees off.

Top dead center on the compression stroke = crank key pointing upwards.


Phase 2:

Phase 3: (Notice cam lobes pointing outward) 8 links from cam dot to dot or 14 pins between the two cam timing dots.