Thefbomb13

Think I screwed the pooch on this one..

Currently doing timing chain.. and as I removed the timing chain the cam sprockets spun and now all valves are close.. the timing is definitely messed up..

cylinder 1 is at TDC but now I’m not sure if I twist the cam shafts that I won’t bend a valve..

anyone have any suggestions? I’ve gone thru the FSM and Haynes but would like another opinion if anyone has an easier method than just using the mating marks.

CK_32

iTrader: (1)

Why not just spin the cam back in the direction it spun in the first place? If it spun out of timing why can't you just spin it back. Shouldn't damage anything that wouldn't have been damaged before during the initial shift.

I partially spun one of mine about 1/2" and spun it back into position. But I also marked my chain and sprockets with pain pens for assurance. Which helped me realign everything to where it needed to be.

rancor

You will be able to spin the cams back to the position they were in when you removed the timing chain as long as you didnt move the crank. Get the cam timing lines back to the alignment to the rear timing cover and put the chain back on. Then turn the engin over by hand to check for valve piston contact. If you are very worried keep turning the engin over until all the timing chain marks, main chain and cam chains, line up with the marks on the crank and cam gears.