timing my ka24de need help

[HitItSideways]

i rebuilt the bottom end in my ka out of my 91 240sx hatch i got everything back together but when i went to put my cam gears on and my chain my intake valves are hitting the #4 piston pushing it down. i double checked my bottom chain everything seems to be lined up right the marks on the idler gear are in the correct spo. can anyone tell me why this would be happening please

[SQUAREroot]

Did you make sure you were at top dead center on #1/#4 cylinders before you started?

Also, check these videos out. This dude does a pretty good step by step:

Lower chain (http://www.youtube.com/watch?v=jbaFoxm-5lE)

Upper Chain (http://www.youtube.com/watch?v=ofV4eghOP_w)

If you dont have the colored chain, at least you can count the chain rivets to make sure your correct.

[HitItSideways]

thanks for the videos im pretty sure i have my cams on the wrong side somehow. im going to flip them and see if that helps before i put my motor in.

[SQUAREroot]

thanks for the videos im pretty sure i have my cams on the wrong side somehow. im going to flip them and see if that helps before i put my motor in.

LOL, didnt even think of that... Your probably right.

[HitItSideways]

no not until about 2 seconds into the first video lol i should of checked that first this isnt my first rebuild